土狗合约规则或机制：
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代币合约源码：
/**
*Submitted for verification at BscScan.com on 2022-02-16
*/
pragma solidity ^0.8.6;
// 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
);
}
abstract contract Ownable {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = msg.sender;
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == msg.sender, "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 {
/**
* @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;
}
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
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(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
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,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
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,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
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);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
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;
}
contract FiveToken is IERC20, Ownable {
using SafeMath for uint256;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping (address => bool) isDividendExempt;
mapping(address => bool) private _isExcludedFromFee;
mapping(address => bool) private _updated;
uint256 private _tFeeTotal;
string private _name = "Five";
string private _symbol = "Five";
uint8 private _decimals = 9;
uint256 public _burnFee = 400;
uint256 private _previousburnFee;
uint256 public _lpFee = 200;
uint256 private _previousLpFee;
uint256 public _cakeFee = 0;
uint256 private _previousCakeFee;
uint256 public _inviterFee = 700;
uint256 private _previousInviterFee;
uint256 currentIndex;
uint256 private _tTotal = 100 * 10**8 * 10**9;
uint256 distributorGas = 500000;
uint256 public minPeriod = 1 hours;
uint256 public lpFeeShareTime;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address private fromAddress;
address private toAddress;
mapping(address => address) public inviter;
address[] shareholders;
mapping (address => uint256) shareholderIndexes;
bool inSwapAndLiquify;
modifier lockTheSwap() {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor() {
_tOwned[msg.sender] = _tTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E);
// 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[msg.sender] = true;
_isExcludedFromFee[address(this)] = true;
isDividendExempt[address(this)] = true;
isDividendExempt[address(0)] = true;
emit Transfer(address(0), msg.sender, _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint256) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _tOwned[account];
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_transfer(msg.sender, 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(msg.sender, spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
msg.sender,
_allowances[sender][msg.sender].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
msg.sender,
spender,
_allowances[msg.sender][spender].add(addedValue)
);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
msg.sender,
spender,
_allowances[msg.sender][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function isExcludedFromFee(address account) public view returns (bool) {
return _isExcludedFromFee[account];
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function removeAllFee() private {
_previousburnFee = _burnFee;
_previousLpFee = _lpFee;
_previousCakeFee = _cakeFee;
_previousInviterFee = _inviterFee;
_burnFee = 0;
_lpFee = 0;
_inviterFee = 0;
_cakeFee = 0;
}
function restoreAllFee() private {
_burnFee = _previousburnFee;
_lpFee = _previousLpFee;
_inviterFee = _previousInviterFee;
_cakeFee = _previousCakeFee;
}
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");
//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] || to == uniswapV2Pair || from == address(uniswapV2Router)) {
takeFee = false;
}
bool shouldSetInviter = balanceOf(to) == 0 && inviter[to] == address(0) && from != uniswapV2Pair;
//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from, to, amount, takeFee);
if (shouldSetInviter) {
inviter[to] = from;
}
if(fromAddress == address(0) ) fromAddress = from;
if(toAddress == address(0)) toAddress = to;
if(!isDividendExempt[fromAddress] && fromAddress != uniswapV2Pair ) setShare(fromAddress);
if(!isDividendExempt[toAddress] && toAddress != uniswapV2Pair ) setShare(toAddress);
fromAddress = from;
toAddress = to;
if(_tOwned[address(this)] >= 1 * 10**4 * 10**9 && from !=address(this) && lpFeeShareTime.add(minPeriod) <= block.timestamp) {
process(distributorGas) ;
lpFeeShareTime = block.timestamp;
}
}
function process(uint256 gas) private {
uint256 shareholderCount = shareholders.length;
if(shareholderCount == 0)return;
uint256 nowbanance = _tOwned[address(this)];
uint256 gasUsed = 0;
uint256 gasLeft = gasleft();
uint256 iterations = 0;
while(gasUsed < gas && iterations < shareholderCount) {
if(currentIndex >= shareholderCount){
currentIndex = 0;
}
uint256 amount = nowbanance.mul(IERC20(uniswapV2Pair).balanceOf(shareholders[currentIndex])).div(IERC20(uniswapV2Pair).totalSupply());
if( amount < 1 * 10**9) {
currentIndex++;
iterations++;
return;
}
if(_tOwned[address(this)] < amount )return;
distributeDividend(shareholders[currentIndex],amount);
gasUsed = gasUsed.add(gasLeft.sub(gasleft()));
gasLeft = gasleft();
currentIndex++;
iterations++;
}
}
function distributeDividend(address shareholder ,uint256 amount) internal {
_tOwned[address(this)] = _tOwned[address(this)].sub(amount);
_tOwned[shareholder] = _tOwned[shareholder].add(amount);
emit Transfer(address(this), shareholder, amount);
}
function setShare(address shareholder) private {
if(_updated[shareholder] ){
if(IERC20(uniswapV2Pair).balanceOf(shareholder) == 0) quitShare(shareholder);
return;
}
if(IERC20(uniswapV2Pair).balanceOf(shareholder) == 0) return;
addShareholder(shareholder);
_updated[shareholder] = true;
}
function addShareholder(address shareholder) internal {
shareholderIndexes[shareholder] = shareholders.length;
shareholders.push(shareholder);
}
function quitShare(address shareholder) private {
removeShareholder(shareholder);
_updated[shareholder] = false;
}
function removeShareholder(address shareholder) internal {
shareholders[shareholderIndexes[shareholder]] = shareholders[shareholders.length-1];
shareholderIndexes[shareholders[shareholders.length-1]] = shareholderIndexes[shareholder];
shareholders.pop();
}
//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();
_transferStandard(sender, recipient, amount);
if (!takeFee) restoreAllFee();
}
//
function _takeburnFee(
address sender,
uint256 tAmount
) private {
if (_burnFee == 0) return;
if(_tFeeTotal >= 999 * 10**7 * 10**9)_burnFee = 0;
_tOwned[address(0)] = _tOwned[address(0)].add(tAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
emit Transfer(sender, address(0), tAmount);
}
function _takeLPFee(address sender,uint256 tAmount) private {
if (_lpFee == 0 && _cakeFee == 0) return;
_tOwned[address(this)] = _tOwned[address(this)].add(tAmount);
emit Transfer(sender, address(this), tAmount);
}
function _takeInviterFee(
address sender,
address recipient,
uint256 tAmount
) private {
if (_inviterFee == 0) return;
address cur;
if (sender == uniswapV2Pair) {
cur = recipient;
} else if (recipient == uniswapV2Pair) {
cur = sender;
} else {
_tOwned[address(this)] = _tOwned[address(this)].add(tAmount.div(10000).mul(_inviterFee));
emit Transfer(sender, address(this), tAmount.div(10000).mul(_inviterFee));
return;
}
uint256 accurRate;
for (int256 i = 0; i < 8; i++) {
uint256 rate;
if (i == 0) {
rate = 250;
} else if(i == 1 ){
rate = 150;
} else {
rate = 50;
}
cur = inviter[cur];
if (cur == address(0)) {
break;
}
accurRate = accurRate.add(rate);
uint256 curTAmount = tAmount.div(10000).mul(rate);
_tOwned[cur] = _tOwned[cur].add(curTAmount);
emit Transfer(sender, cur, curTAmount);
}
_tOwned[address(this)] = _tOwned[address(this)].add(tAmount.div(10000).mul(_inviterFee.sub(accurRate)));
emit Transfer(sender, address(this), tAmount.div(10000).mul(_inviterFee.sub(accurRate)));
}
function _transferStandard(
address sender,
address recipient,
uint256 tAmount
) private {
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_takeburnFee(sender, tAmount.div(10000).mul(_burnFee));
_takeLPFee(sender, tAmount.div(10000).mul(_lpFee.add(_cakeFee)));
_takeInviterFee(sender, recipient, tAmount);
uint256 recipientRate = 10000 - _burnFee -_lpFee - _cakeFee - _inviterFee;
_tOwned[recipient] = _tOwned[recipient].add(tAmount.div(10000).mul(recipientRate));
emit Transfer(sender, recipient, tAmount.div(10000).mul(recipientRate));
}
}申明：作者只是感兴趣收集，研究区块链技术。其它一切事项与本人无关，也欢迎其他人与我技术沟通交流,合约源码源自网络
https://bscscan.com/address/0xea2f070c1b72012afb0ec30c267a792424027688#code
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