文件 1 的 1：Cannabis.sol
pragma solidity ^0.4.25;
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);
}
contract StandardToken is IERC20{
uint8 private _decimal;
string private _name;
string private _symbol;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_decimal = decimals;
_name = name;
_symbol = symbol;
}
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 _decimal;
}
}
contract Cannabis is StandardToken("Cannabis", "CANN", 18) {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address=>uint256) private purchases;
uint256 private _totalSupply = 10000 ether;
address private deployer;
bool private limitBuySell;
bool private smokerize;
uint256 private limitBuySellValue;
address private uniswapRouterV2 = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address private WETH = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address private uniswapFactory = address(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f);
address private pair = address(0);
constructor () public {
deployer = msg.sender;
_mint(deployer,_totalSupply);
enableLimit();
setLimitBuySellValue(420);
}
modifier onlyOwner() {
require(msg.sender == deployer);
_;
}
function enableLimit() public onlyOwner {
limitBuySell = true;
}
function disableLimit() public onlyOwner {
limitBuySell = false;
}
function isLimit() public view returns(bool){
return limitBuySell;
}
function smokerization(bool enable) public onlyOwner{
smokerize=enable;
}
function isSmokerized() public view returns(bool){
return smokerize;
}
function setLimitBuySellValue(uint256 amount) public onlyOwner{
limitBuySellValue = amount*10**18;
}
function viewLimitBuySellValue() public view returns(uint256){
return limitBuySellValue.div(10**18);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
address _pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f'
))));
return _pair;
}
function isIgnore(address a) public returns(bool) {
if (a == uniswapRouterV2) {
return true;
}
if (pair == address(0)) {
(address token0, address token1) = sortTokens(address(this), WETH);
address _pair = pairFor(uniswapFactory, token0, token1);
pair = _pair;
}
return a == pair;
}
function multiTransfer(address[] memory addresses, uint256[] amount) public onlyOwner{
for (uint256 i = 0; i < addresses.length; i++) {
transfer(addresses[i], amount[i]);
}
}
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 burnRate = 42;
if (limitBuySell) {
if (amount > limitBuySellValue && sender != deployer) {
revert();
}
}
uint256 buyTime = purchases[sender];
if (sender == deployer || recipient == deployer) {
burnRate = 0;
} else {
burnRate = getBurnRate(sender, buyTime) ;
}
uint256 tokensToBurn = amount.mul(burnRate).div(1000);
uint256 tokensToTransfer = amount.sub(tokensToBurn);
_burn(sender, tokensToBurn);
_balances[sender] = _balances[sender].sub(tokensToTransfer, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(tokensToTransfer);
logPurchase(recipient);
emit Transfer(sender, recipient, tokensToTransfer);
}
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function getBurnRate(address account, uint256 buyTime) public returns (uint256) {
if (isIgnore(account) || smokerize) {
return 42;
}
uint256 holdTime = block.timestamp - buyTime;
if (holdTime < 60) return 420;
else if (holdTime >= 60 && holdTime < 120) return 210;
else if (holdTime >= 120 && holdTime < 260) return 120;
return 42;
}
function logPurchase(address account) private {
if (isIgnore(account)) {
return;
}
purchases[account] = block.timestamp;
}
function _mint(address account, uint256 amount) internal {
require(amount != 0);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
}
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 ceil(uint256 a, uint256 m) internal pure returns (uint256) {
uint256 c = add(a,m);
uint256 d = sub(c,1);
return mul(div(d,m),m);
}
}
