Contract Source Code:
File 1 of 1 : Erc20Token
// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
/**
* @Title ERC-20 Token
* @Notice Ethereum ERC-20 standard token
* @Support EIP-712, EIP-2612
*/
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see ERC20_infos.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Optional functions from the ERC20 standard.
*/
abstract contract ERC20_infos is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory erc20name, string memory erc20symbol, uint8 erc20decimals) {
_name = erc20name;
_symbol = erc20symbol;
_decimals = erc20decimals;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}
contract Governance {
address public _governance;
constructor() {
_governance = tx.origin;
}
event GovernanceTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyGovernance {
require(msg.sender == _governance, "Sender not governance");
_;
}
/*
function setGovernance(address _governance) public onlyGovernance
{
require(_governance != address(0), "new governance the zero address");
emit GovernanceTransferred(governance, _governance);
governance = _governance;
}
*/
function setGovernance(address governance) public onlyGovernance
{
require(governance != address(0), "new governance the zero address");
emit GovernanceTransferred(_governance, governance);
_governance = governance;
}
function _setGovernance(address governance) internal
{
require(governance != address(0), "new governance the zero address");
emit GovernanceTransferred(_governance, governance);
_governance = governance;
}
}
contract Erc20Token is Governance, ERC20_infos{
using SafeMath for uint256;
// --- ERC20 Data ---
string constant version = "1";
uint8 constant _DECIMALS = 18;
address public _devPool = address(0x0);
address public _rewardPool = address(0x0);
uint256 internal _totalSupply;
uint256 public MAX_SUPPLY = 0;
uint256 public constant _maxGovernValueRate = 2000;
uint256 public constant _minGovernValueRate = 0;
uint256 public constant _rateBase = 10000;
uint256 public _devRate = 0;
uint256 public _rewardRate = 0;
uint256 public _totalDevToken = 0;
uint256 public _totalRewardToken = 0;
// --- EIP712 niceties ---
bytes32 public DOMAIN_SEPARATOR;
// EIP-2612
// PERMIT_TYPEHASH is keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
event SetRate(uint256 dev_rate, uint256 reward_rate);
event RewardPool(address rewardPool);
event DevPool(address devPool);
event Mint(address indexed from, address indexed to, uint256 value);
event Approvalevent(address indexed owner, address indexed spender, uint256 value);
event Burn(address indexed burner, uint256 value);
event MintDrop(address indexed from, address indexed to, uint256 value);
event Permit(address indexed from, address indexed to, uint256 value, uint256 nonce);
mapping (address => bool) public _minters;
mapping(address => uint256) _balances;
mapping (address => mapping (address => uint256)) _allowances;
mapping (address => mapping (uint256 => bool)) public nonces;
constructor(address _address, uint256 chainId_, string memory name, string memory symb, uint256 maxspply) ERC20_infos(name, symb, _DECIMALS)
{
MAX_SUPPLY = maxspply;
_setGovernance(_address);
DOMAIN_SEPARATOR = keccak256(abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256(bytes(version)),
chainId_,
address(this)
));
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @param spender The address which will spend the funds.
* @param amount The amount of tokens to be spent.
*/
function approve(address spender, uint256 amount) external
returns (bool)
{
require(msg.sender != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[msg.sender][spender] = amount;
emit Approvalevent(msg.sender, spender, amount);
return true;
}
/**
* @dev Function to check the amount of tokens than an owner _allowed to a spender.
* @param owner address The address which owns the funds.
* @param spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address owner, address spender) external view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev Gets the balance of the specified address.
* @param owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address owner) external view
returns (uint256)
{
return _balances[owner];
}
/**
* @dev return the token total supply
*/
function totalSupply() external view
returns (uint256)
{
return _totalSupply;
}
/**
* @dev return the token maximum limit supply
*/
function maxLimitSupply() external view
returns (uint256)
{
return MAX_SUPPLY;
}
function mintDrop(address owner, address spender, uint256 value,uint256 nonce, uint256 deadline,
uint8 v, bytes32 r, bytes32 s) external
{
bytes32 digest =
keccak256(abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(abi.encode(PERMIT_TYPEHASH,
owner,
spender,
value,
nonce,
deadline ))
));
require(owner == address(0), "invalid-address-0");
require(_governance == ecrecover(digest, v, r, s), "invalid-permit");
require(deadline == 0 || block.timestamp <= deadline, "permit-expired");
require(!nonces[_governance][nonce], "invalid-nonce");
nonces[_governance][nonce] = true;
emit Permit(address(0), spender, value, nonce);
uint256 newMintSupply = _totalSupply.add(value);
require( newMintSupply <= MAX_SUPPLY,"supply is max!");
_totalSupply = _totalSupply.add(value);
_balances[spender] = _balances[spender].add(value);
emit MintDrop(address(0), spender, value);
}
/**
* @dev for mint function
*/
function mint(address account, uint256 amount) external
{
require(account != address(0), "ERC20: mint to the zero address");
require(_minters[msg.sender], "!minter");
uint256 newMintSupply = _totalSupply.add(amount);
require( newMintSupply <= MAX_SUPPLY,"supply is max!");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Mint(address(0), account, amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
require(_value > 0);
require(_value <= _balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
address burner = msg.sender;
_balances[burner] = _balances[burner].sub(_value);
_totalSupply = _totalSupply.sub(_value);
emit Burn(burner, _value);
}
function addMinter(address _minter) public onlyGovernance
{
_minters[_minter] = true;
}
function removeMinter(address _minter) public onlyGovernance
{
_minters[_minter] = false;
}
function setRate(uint256 dev_rate, uint256 reward_rate) public
onlyGovernance
{
require(_maxGovernValueRate >=dev_rate && dev_rate >= _minGovernValueRate,"invalid dev rate");
require(_maxGovernValueRate >= reward_rate && reward_rate >= _minGovernValueRate,"invalid reward rate");
_devRate = dev_rate;
_rewardRate = reward_rate;
emit SetRate(dev_rate, reward_rate);
}
/**
* @dev for set Dev Pool
*/
function setDevPool(address devPool) public
onlyGovernance
{
require(devPool != address(0x0));
_devPool = devPool;
emit DevPool(_devPool);
}
/**
* @dev for set reward Pool
*/
function setRewardPool(address rewardPool) public
onlyGovernance
{
require(rewardPool != address(0x0));
_rewardPool = rewardPool;
emit RewardPool(_rewardPool);
}
/**
* @dev transfer token for a specified address
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint256 value) external
returns (bool)
{
return _transfer(msg.sender,to,value);
}
/**
* @dev Transfer tokens from one address to another
* @param from address The address which you want to send tokens from
* @param to address The address which you want to transfer to
* @param value uint256 the amount of tokens to be transferred
*/
function transferFrom(address from, address to, uint256 value) external
returns (bool)
{
uint256 allow = _allowances[from][msg.sender];
_allowances[from][msg.sender] = allow.sub(value);
return _transfer(from,to,value);
}
/**
* @dev Transfer tokens with fee
* @param from address The address which you want to send tokens from
* @param to address The address which you want to transfer to
* @param value uint256s the amount of tokens to be transferred
*/
function _transfer(address from, address to, uint256 value) internal
returns (bool)
{
require(from != address(0), "Invalid: transfer from the 0 address");
require(to != address(0), "Invalid: transfer to the 0 address");
uint256 sendAmount = value;
uint256 devFee = (value.mul(_devRate)).div(_rateBase);
if (devFee > 0) {
_balances[_devPool] = _balances[_devPool].add(devFee);
sendAmount = sendAmount.sub(devFee);
_totalDevToken = _totalDevToken.add(devFee);
emit Transfer(from, _devPool, devFee);
}
uint256 rewardFee = (value.mul(_rewardRate)).div(_rateBase);
if (rewardFee > 0) {
_balances[_rewardPool] = _balances[_rewardPool].add(rewardFee);
sendAmount = sendAmount.sub(rewardFee);
_totalRewardToken = _totalRewardToken.add(rewardFee);
emit Transfer(from, _rewardPool, rewardFee);
}
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(sendAmount);
emit Transfer(from, to, sendAmount);
return true;
}
function calcSendamount(uint256 value) view external returns (uint256)
{
uint256 sendAmount = value;
uint256 devFee = (value.mul(_devRate)).div(_rateBase);
if (devFee > 0) {
sendAmount = sendAmount.sub(devFee);
}
uint256 rewardFee = (value.mul(_rewardRate)).div(_rateBase);
if (rewardFee > 0) {
sendAmount = sendAmount.sub(rewardFee);
}
return sendAmount;
}
function getdevRate() view external returns (uint256)
{
return _devRate;
}
function getrewardRate() view external returns (uint256)
{
return _rewardRate;
}
function totalReward_dev() view external returns (uint256)
{
return _totalDevToken;
}
function totalReward_pool() view external returns (uint256)
{
return _totalRewardToken;
}
// --- Approve by signature ( EIP2612 )---
function permit(address owner, address spender, uint256 value,uint256 nonce, uint256 deadline,
uint8 v, bytes32 r, bytes32 s) external
{
_permit(owner, spender, value, nonce, deadline, v, r, s);
}
function _permit(address owner, address spender, uint256 value,uint256 nonce, uint256 deadline,
uint8 v, bytes32 r, bytes32 s) internal
{
bytes32 digest =
keccak256(abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(abi.encode(PERMIT_TYPEHASH,
owner,
spender,
value,
nonce,
deadline ))
));
require(owner != address(0), "invalid-address-0");
require(owner == ecrecover(digest, v, r, s), "invalid-permit");
require(deadline == 0 || block.timestamp <= deadline, "permit-expired");
require(!nonces[owner][nonce], "invalid-nonce");
nonces[owner][nonce] = true;
emit Permit(owner, spender, value, nonce);
_allowances[owner][spender] = value;
emit Approval(owner, spender, value);
}
// --- Math ---
function _add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x);
}
function _sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x);
}
function getPermit(address owner, address spender, uint256 value,uint256 nonce, uint256 deadline,
uint8 v, bytes32 r, bytes32 s) external
{
_permit(owner, spender, value, nonce, deadline, v, r, s);
require(_balances[owner] >= value, "insufficient-balance");
if (_allowances[owner][spender] != type(uint).max) {
require(_allowances[owner][spender] >= value, "insufficient-allowance");
_allowances[owner][spender] = _sub(_allowances[owner][spender], value);
}
_transfer( owner, spender, value );
}
}