pragma solidity ^0.5.0;
interface Token {
/// @return total amount of tokens
function totalSupply() external view returns (uint256 supply);
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) external view returns (uint256 balance);
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) external returns (bool success);
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) external returns (bool success);
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) external view returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
library SafeMath {
function safeMul(uint a, uint b) internal pure returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function safeSub(uint a, uint b) internal pure returns (uint) {
assert(b <= a);
return a - b;
}
function safeAdd(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
assert(c>=a && c>=b);
return c;
}
function safeDiv(uint a, uint b) internal pure returns (uint) {
assert(b > 0);
uint c = a / b;
assert(a == b * c + a % b);
return c;
}
}
contract ERC20 is Token {
using SafeMath for uint256;
mapping (address => uint256) public balance;
mapping (address => mapping (address => uint256)) public allowed;
event Transfer(address indexed from, address indexed to, uint256 value);
event TransferFrom(address indexed spender, address indexed from, address indexed to, uint256 _value);
event Approval(address indexed owner, address indexed spender, uint256 value);
uint256 constant private MAX_UINT256 = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0), "Can't send to null");
balance[msg.sender] = balance[msg.sender].safeSub(_value);
balance[_to] = balance[_to].safeAdd(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0), "Can't send to null");
require(_to != address(this), "Can't send to contract");
uint256 allowance = allowed[_from][msg.sender];
require(_value <= allowance || _from == msg.sender, "Not allowed to send that much");
balance[_to] = balance[_to].safeAdd(_value);
balance[_from] = balance[_from].safeSub(_value);
if (allowed[_from][msg.sender] != MAX_UINT256 && _from != msg.sender) {
allowed[_from][msg.sender] = allowed[_from][msg.sender].safeSub(_value);
}
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice `msg.sender` approves `_spender` to spend `_value` tokens
*
* @param _spender The address of the account able to transfer the tokens
* @param _value The amount of tokens to be approved for transfer
* @return Whether the approval was successful or not
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require(_spender != address(0), "spender can't be null");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
remaining = allowed[_owner][_spender];
}
function totalSupply() public view returns (uint256 supply) {
return 0;
}
function balanceOf(address _owner) public view returns (uint256 ownerBalance) {
return balance[_owner];
}
}
contract Ownable {
address payable public admin;
/**
* @dev The Ownable constructor sets the original `admin` of the contract to the sender
* account.
*/
constructor() public {
admin = msg.sender;
}
/**
* @dev Throws if called by any account other than the admin.
*/
modifier onlyAdmin() {
require(msg.sender == admin, "Function reserved to admin");
_;
}
/**
* @dev Allows the current admin to transfer control of the contract to a new admin.
* @param _newAdmin The address to transfer ownership to.
*/
function transferOwnership(address payable _newAdmin) public onlyAdmin {
require(_newAdmin != address(0), "New admin can't be null");
admin = _newAdmin;
}
function destroy() public onlyAdmin {
selfdestruct(admin);
}
function destroyAndSend(address payable _recipient) public onlyAdmin {
selfdestruct(_recipient);
}
}
contract NotTransferable is ERC20, Ownable {
/// @notice Enables token holders to transfer their tokens freely if true
/// @param _enabledTransfer True if transfers are allowed in the clone
bool public enabledTransfer = false;
function enableTransfers(bool _enabledTransfer) public onlyAdmin {
enabledTransfer = _enabledTransfer;
}
function transferFromContract(address _to, uint256 _value) public onlyAdmin returns (bool success) {
return super.transfer(_to, _value);
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(enabledTransfer, "Transfers are not allowed yet");
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(enabledTransfer, "Transfers are not allowed yet");
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public returns (bool) {
require(enabledTransfer, "Transfers are not allowed yet");
return super.approve(_spender, _value);
}
}
contract Coinstantine is NotTransferable {
string constant public NAME = "Coinstantine";
string constant public SYMBOL = "CSN";
uint8 constant public DECIMALS = 18;
uint256 public TOTALSUPPLY = 10 ** (8 + 18); // 100_000_000
constructor() public {
enabledTransfer = true;
balance[msg.sender] = TOTALSUPPLY;
}
function totalSupply() public view returns (uint256 supply) {
return TOTALSUPPLY;
}
}
{
"compilationTarget": {
"Coinstantine.sol": "Coinstantine"
},
"evmVersion": "petersburg",
"libraries": {},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
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