文件 1 的 1:CAP25.sol
pragma solidity 0.7.0;
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 {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0);
uint256 c = a / b;
return c;
}
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);
}
}
abstract contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) {
_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 CAP25 is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
mapping (address => bool) private _whitelist;
address private constant _router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address private _owner;
string constant tokenName = "CAP25";
string constant tokenSymbol = "CAP25";
uint8 constant tokenDecimals = 0;
uint256 public burnPct = 10;
uint256 private _totalSupply = 1_000_000_000;
uint256 private _txCap = 25_000_000;
constructor() ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
_owner = msg.sender;
_balances[_owner] = _totalSupply;
_modifyWhitelist(_owner, true);
_modifyWhitelist(_router, true);
}
function totalSupply() external view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) external view override returns (uint256) {
return _balances[owner];
}
function allowance(address owner, address spender) external view override returns (uint256) {
return _allowed[owner][spender];
}
function findBurnAmount(uint256 rate, uint256 value) public pure returns (uint256) {
return value.ceil(100).mul(rate).div(100);
}
function _modifyWhitelist(address adr, bool state) internal {
_whitelist[adr] = state;
}
function _checkWhitelist(address adr) internal view returns (bool) {
return _whitelist[adr];
}
function transfer(address to, uint256 value) external override returns (bool) {
require(value <= _balances[msg.sender]);
require(to != address(0));
if (_checkWhitelist(msg.sender)) {
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(msg.sender, to, value);
return true;
} else {
require (value <= _txCap || _checkWhitelist(to),
"amount exceeds tx cap");
uint256 tokensToBurn = findBurnAmount(burnPct, value);
uint256 tokensToTransfer = value.sub(tokensToBurn);
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(tokensToTransfer);
_totalSupply = _totalSupply.sub(tokensToBurn);
emit Transfer(msg.sender, to, tokensToTransfer);
emit Transfer(msg.sender, address(0), tokensToBurn);
return true;
}
}
function approve(address spender, uint256 value) external override 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) external override returns (bool) {
require(value <= _balances[from]);
require(value <= _allowed[from][msg.sender]);
require(to != address(0));
if (_checkWhitelist(from)) {
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(from, to, value);
return true;
} else {
require (value <= _txCap || _checkWhitelist(to),
"amount exceeds tx cap");
_balances[from] = _balances[from].sub(value);
uint256 tokensToBurn = findBurnAmount(burnPct, value);
uint256 tokensToTransfer = value.sub(tokensToBurn);
_balances[to] = _balances[to].add(tokensToTransfer);
_totalSupply = _totalSupply.sub(tokensToBurn);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
emit Transfer(from, to, tokensToTransfer);
emit Transfer(from, address(0), tokensToBurn);
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;
}
}
{
"compilationTarget": {
"CAP25.sol": "CAP25"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}