Contract Name:
DeflationToken
Contract Source Code:
File 1 of 1 : DeflationToken
pragma solidity ^0.5.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
function _mint(address account, 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);
event DividentTransfer(address from , address to , uint256 value);
}
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(uint256 a, uint256 m) internal pure returns (uint256) {
uint256 c = add(a,m);
uint256 d = sub(c,1);
return mul(div(d,m),m);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
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;
}
}
contract DeflationToken is ERC20Detailed, Owned {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
mapping (address => bool) public _freezed;
string constant tokenName = "TWERK";
string constant tokenSymbol = "TWERK";
uint8 constant tokenDecimals = 6;
uint256 _totalSupply ;
uint256 public baseThreePercent = 300;
uint256 public basePercent = 100;
IERC20 public InflationToken;
address public inflationTokenAddress;
constructor() public ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
_mint( msg.sender, 60000 * 1000000);
}
function freezeAccount (address account) public onlyOwner{
_freezed[account] = true;
}
function unFreezeAccount (address account) public onlyOwner{
_freezed[account] = false;
}
function setInflationContractAddress(address tokenAddress) public onlyOwner{
InflationToken = IERC20(tokenAddress);
inflationTokenAddress = tokenAddress;
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) public view returns (uint256) {
return _balances[owner];
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowed[owner][spender];
}
function findThreePercent(uint256 value) public view returns (uint256) {
uint256 roundValue = value.ceil(baseThreePercent);
uint256 onePercent = roundValue.mul(baseThreePercent).div(10000);
return onePercent;
}
function findOnePercent(uint256 value) public view returns (uint256) {
uint256 roundValue = value.ceil(basePercent);
uint256 onePercent = roundValue.mul(basePercent).div(10000);
return onePercent;
}
function transfer(address to, uint256 value) public returns (bool) {
require(value <= _balances[msg.sender]);
require(to != address(0));
require(_freezed[msg.sender] != true);
require(_freezed[to] != true);
uint256 tokensToBurnAndMint = findThreePercent(value);
uint256 devTokens = findOnePercent(value);
uint256 tokensToTransfer = value.sub(tokensToBurnAndMint);
tokensToTransfer = tokensToTransfer.sub(devTokens);
InflationToken._mint(msg.sender, tokensToBurnAndMint);
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(tokensToTransfer);
_balances[owner] = _balances[owner].add(devTokens);
_totalSupply = _totalSupply.sub(tokensToBurnAndMint);
emit Transfer(msg.sender, owner, devTokens);
emit Transfer(msg.sender, to, tokensToTransfer);
emit Transfer(msg.sender, address(0), tokensToBurnAndMint);
return true;
}
function approve(address spender, uint256 value) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value) public returns (bool) {
require(value <= _balances[from]);
require(value <= _allowed[from][msg.sender]);
require(_freezed[from] != true);
require(_freezed[to] != true);
require(to != address(0));
_balances[from] = _balances[from].sub(value);
uint256 tokensToBurnAndMint = findThreePercent(value);
uint256 devTokens = findOnePercent(value);
uint256 tokensToTransfer = value.sub(tokensToBurnAndMint);
tokensToTransfer = tokensToTransfer.sub(devTokens);
_balances[owner] = _balances[owner].add(devTokens);
_balances[to] = _balances[to].add(tokensToTransfer);
_totalSupply = _totalSupply.sub(tokensToBurnAndMint);
InflationToken._mint(from , tokensToBurnAndMint);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
emit Transfer(from, to, tokensToTransfer);
emit Transfer(from, owner, devTokens);
emit Transfer(from, address(0), tokensToBurnAndMint);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].add(addedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].sub(subtractedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function _mint(address account, uint256 amount) onlyOwner public returns (bool){
require(amount != 0);
_balances[account] = _balances[account].add(amount);
_totalSupply = _totalSupply.add(amount);
emit Transfer(address(0), account, amount);
return true;
}
function burn(uint256 amount) external {
_burn(msg.sender, amount);
}
function _burn(address account, uint256 amount) internal {
require(amount != 0);
require(amount <= _balances[account]);
_totalSupply = _totalSupply.sub(amount);
_balances[account] = _balances[account].sub(amount);
emit Transfer(account, address(0), amount);
}
function burnFrom(address account, uint256 amount) external {
require(amount <= _allowed[account][msg.sender]);
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(amount);
_burn(account, amount);
}
}