Hi everyone,
I have code for the ERC20 token which has freeze, unfreeze, lockUser & unlockUser functions. I want is:
- When I lock someone he will be automatically unlocked after x days or,
- Scheduled release of locked tokens. For example, 2% each day released.
I want any of these included in my current contract or create a new one for me.
Below Is My Code:
pragma solidity ^0.5.16;
// ----------------------------------------------------------------------------
// 'DexPortfolio' Token contract
//
// Symbol : ****
// Name : *****
// Total supply: *****
// Decimals : 18
//
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return add(a, b, "SafeMath: addition overflow");
}
function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, errorMessage);
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
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, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface BEP20Interface {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address _owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract Tokenlock is Ownable {
/// @notice Indicates if token is locked
uint8 isLocked = 0;
event Freezed();
event UnFreezed();
modifier validLock {
require(isLocked == 0, "Token is locked");
_;
}
function freeze() public onlyOwner {
isLocked = 1;
emit Freezed();
}
function unfreeze() public onlyOwner {
isLocked = 0;
emit UnFreezed();
}
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public;
}
// ----------------------------------------------------------------------------
// Limit users in blacklist
// ----------------------------------------------------------------------------
contract UserLock is Ownable {
mapping(address => bool) blacklist;
event LockUser(address indexed who);
event UnlockUser(address indexed who);
modifier permissionCheck {
require(!blacklist[msg.sender], "Blocked user");
_;
}
function lockUser(address who) public onlyOwner {
blacklist[who] = true;
emit LockUser(who);
}
function unlockUser(address who) public onlyOwner {
blacklist[who] = false;
emit UnlockUser(who);
}
}
contract DEXP is BEP20Interface, Tokenlock, UserLock {
using SafeMath for uint256;
/// @notice Official record of token balances for each account
mapping (address => uint256) private _balances;
/// @notice Allowance amounts on behalf of others
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
uint8 private _decimals;
string private _symbol;
string private _name;
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
constructor(address account) public {
_name = "*******";
_symbol = "******";
_decimals = 18;
_totalSupply = 1000000e18;
_balances[account] = _totalSupply;
emit Transfer(address(0), account, _totalSupply);
}
function getOwner() external view returns (address) {
return owner();
}
function decimals() external view returns (uint8) {
return _decimals;
}
function symbol() external view returns (string memory) {
return _symbol;
}
function name() external view returns (string memory) {
return _name;
}
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) external validLock permissionCheck returns (bool) {
emit Transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) external validLock permissionCheck returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function approveAndCall(address spender, uint256 amount, bytes memory data) public validLock permissionCheck returns (bool) {
_approve(_msgSender(), spender, amount);
ApproveAndCallFallBack(spender).receiveApproval(_msgSender(), amount, address(this), data);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external validLock permissionCheck returns (bool) {
emit Transfer(sender, recipient, amount);
address spender = _msgSender();
uint256 spenderAllowance = _allowances[sender][spender];
if (spenderAllowance != uint256(-1)) {
_approve(sender, spender, spenderAllowance.sub(amount, "The transfer amount exceeds allowance"));
}
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public validLock permissionCheck returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue, "The increased allowance overflows"));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public validLock permissionCheck returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "The decreased allowance below zero"));
return true;
}
function burn(uint256 amount) public validLock permissionCheck returns (bool) {
_burn(_msgSender(), amount);
return true;
}
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "Cannot approve from the zero address");
require(spender != address(0), "Cannot approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _burn(address account, uint256 amount) internal {
require(account != address(0), "Cannot burn from the zero address");
_balances[account] = _balances[account].sub(amount, "The burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}}