文件 1 的 4:IOwnershipTransferrable.sol
pragma solidity ^0.7.0;
interface IOwnershipTransferrable {
function transferOwnership(address owner) external;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
}
文件 2 的 4:Ownable.sol
pragma solidity ^0.7.0;
import "./IOwnershipTransferrable.sol";
abstract contract Ownable is IOwnershipTransferrable {
address private _owner;
constructor(address owner) {
_owner = owner;
emit OwnershipTransferred(address(0), _owner);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == msg.sender, "Ownable: caller is not the owner");
_;
}
function transferOwnership(address newOwner) override external onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
文件 3 的 4:SafeMath.sol
pragma solidity ^0.7.0;
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 mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
文件 4 的 4:Vybe.sol
pragma solidity ^0.7.0;
import "./SafeMath.sol";
import "./Ownable.sol";
contract Vybe is Ownable {
using SafeMath for uint256;
uint256 constant UINT256_MAX = ~uint256(0);
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
constructor() Ownable(msg.sender) {
_name = "Vybe";
_symbol = "VYBE";
_decimals = 18;
_totalSupply = 2000000 * 1e18;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function name() external view returns (string memory) {
return _name;
}
function symbol() external view returns (string memory) {
return _symbol;
}
function decimals() external view returns (uint8) {
return _decimals;
}
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
function transfer(address recipient, uint256 amount) external returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function approve(address spender, uint256 amount) external returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
_transfer(sender, recipient, amount);
if (_allowances[msg.sender][sender] != UINT256_MAX) {
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
}
return true;
}
function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0));
require(recipient != address(0));
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0));
require(spender != address(0));
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function mint(address account, uint256 amount) external onlyOwner {
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function burn(uint256 amount) external returns (bool) {
_balances[msg.sender] = _balances[msg.sender].sub(amount);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(msg.sender, address(0), amount);
return true;
}
}
{
"compilationTarget": {
"Vybe.sol": "Vybe"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 250
},
"remappings": []
}