文件 1 的 4:ERC20Contract.sol
pragma solidity ^0.6.0;
abstract contract ERC20Interface {
function totalSupply() public virtual view returns (uint);
function balanceOf(address tokenOwner) public virtual view returns (uint256 balance);
function allowance(address tokenOwner, address spender) public virtual view returns (uint256 remaining);
function transfer(address to, uint256 tokens) public virtual returns (bool success);
function approve(address spender, uint256 tokens) public virtual returns (bool success);
function transferFrom(address from, address to, uint256 tokens) public virtual returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint256 tokens);
}
文件 2 的 4:HATCH.sol
pragma solidity ^0.6.0;
import './SafeMath.sol';
import './ERC20Contract.sol';
import './Owned.sol';
contract HatchToken is ERC20Interface, Owned {
using SafeMath for uint256;
string public symbol = "HATCH";
string public name = "HatchDAO";
uint256 public decimals = 18;
uint256 private maxCapSupply = 1e7 * 10**(decimals);
uint256 _totalSupply = 520000 * 10 ** (decimals);
address incubator;
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;
constructor() public {
balances[owner] = balances[owner].add(_totalSupply);
emit Transfer(address(0),owner, _totalSupply);
}
function SetIncubator(address _address) external onlyOwner{
require(_address != address(0), "Invalid address");
incubator = _address;
}
function MintTokens(uint256 _amount, address _beneficiary) public returns(bool){
require(msg.sender == incubator);
require(_beneficiary != address(0), "Invalid address");
require(_totalSupply.add(_amount) <= maxCapSupply, "exceeds max cap supply 10 million");
_totalSupply = _totalSupply.add(_amount);
balances[_beneficiary] = balances[_beneficiary].add(_amount);
emit Transfer(address(0),_beneficiary, _amount);
return true;
}
function BurnTokens(uint256 _amount) external {
_burn(_amount, msg.sender);
}
function _burn(uint256 _amount, address _account) internal {
require(balances[_account] >= _amount, "insufficient account balance");
_totalSupply = _totalSupply.sub(_amount);
balances[_account] = balances[_account].sub(_amount);
emit Transfer(_account, address(0), _amount);
}
function totalSupply() public override view returns (uint256){
return _totalSupply;
}
function balanceOf(address tokenOwner) public override view returns (uint256 balance) {
return balances[tokenOwner];
}
function transfer(address to, uint256 tokens) public override returns (bool success) {
require(address(to) != address(0));
require(balances[msg.sender] >= tokens );
require(balances[to].add(tokens) >= balances[to]);
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender,to,tokens);
return true;
}
function approve(address spender, uint256 value) public override returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 tokens) public override returns (bool success){
require(tokens <= allowed[from][msg.sender]);
require(balances[from] >= tokens);
require(from != address(0), "Invalid address");
require(to != address(0), "Invalid address");
balances[from] = balances[from].sub(tokens);
balances[to] = balances[to].add(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
emit Transfer(from,to,tokens);
return true;
}
function allowance(address tokenOwner, address spender) public override view returns (uint256 remaining) {
return allowed[tokenOwner][spender];
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, allowed[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, allowed[msg.sender][spender].sub(subtractedValue));
return true;
}
function _approve(address owner, address spender, uint256 value) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
allowed[owner][spender] = value;
emit Approval(owner, spender, value);
}
}
文件 3 的 4:Owned.sol
pragma solidity ^0.6.0;
contract Owned {
address payable public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address payable _newOwner) public onlyOwner {
owner = _newOwner;
emit OwnershipTransferred(msg.sender, _newOwner);
}
}
文件 4 的 4:SafeMath.sol
pragma solidity ^0.6.0;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
function ceil(uint a, uint m) internal pure returns (uint r) {
return (a + m - 1) / m * m;
}
}
{
"compilationTarget": {
"HATCH.sol": "HatchToken"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}