文件 1 的 1：RunesToken.sol
pragma solidity 0.8.6;
interface IERC20 {
function totalSupply() external view returns (uint);
function balanceOf(address account) external view returns (uint);
function transfer(address recipient, uint amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint amount) external returns (bool);
function transferFrom(address sender, address recipient, uint amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
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) {
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
function mod(uint a, uint b) internal pure returns (uint) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b != 0, errorMessage);
return a % b;
}
}
contract RunesToken is IERC20{
using SafeMath for uint;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
mapping (address => uint) private _balances;
mapping (address => mapping (address => uint)) private _allowances;
mapping (address => bool) public isWhite;
string private _symbol = "Runes";
string private _name = "Runes Token";
uint private constant E18 = 1000000000000000000;
uint private _totalSupply = 10000000000 * E18;
uint private _decimals = 18;
address _owner;
bool cantransfer;
constructor(){
_owner = msg.sender;
isWhite[_owner] = true;
_balances[_owner] = _totalSupply;
emit Transfer(address(0), _owner, _totalSupply);
}
function decimals() public view returns(uint) {
return _decimals;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function name() public view returns (string memory) {
return _name;
}
function totalSupply() public override view returns (uint) {
return _totalSupply;
}
function balanceOf(address account) public override view returns (uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint 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, uint addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address to, uint amount) internal {
require(isWhite[sender] || isWhite[to] || cantransfer,"can not transfer now");
require(sender != address(0), "ERC20: transfer from the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(_balances[sender] >= amount,"exceed balance!");
_balances[sender] = _balances[sender].sub(amount);
_balances[to] = _balances[to].add(amount);
emit Transfer(sender, to, 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);
}
function setcantransfer(bool _cantransfer) external {
require(msg.sender == _owner,"not owner");
cantransfer = _cantransfer;
}
function setwhite(address _user,bool _iswhite) external {
require(msg.sender == _owner,"not owner");
isWhite[_user] = _iswhite;
}
function renounceOwnership() external {
require(msg.sender == _owner,"not owner");
_owner = address(0);
emit OwnershipTransferred(_owner, address(0));
}
}
