Contract Name:
ETPlanToken
Contract Source Code:
File 1 of 1 : ETPlanToken
pragma solidity >=0.4.23 <0.6.0;
/**
* eplans.vip
**/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin- solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b > 0);
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
contract Token {
/// @return total amount of tokens
//function totalSupply() public view returns (uint supply);
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) public view returns (uint 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, uint _value) public 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, uint _value) public 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, uint _value) public 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) public view returns (uint remaining);
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
}
contract RegularToken is Token {
using SafeMath for uint256;
function transfer(address _to, uint _value) public returns (bool) {
require(_to != address(0));
//Default assumes totalSupply can't be over max (2^256 - 1).
require(balances[msg.sender] >= _value);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint _value) public returns (bool) {
require(_to != address(0));
require(balances[_from] >= _value);
require(allowed[_from][msg.sender] >= _value);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint) {
return balances[_owner];
}
function approve(address _spender, uint _value) public returns (bool) {
require(_spender != address(0));
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint) {
return allowed[_owner][_spender];
}
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
uint public totalSupply;
}
contract UnboundedRegularToken is RegularToken {
uint constant MAX_UINT = 2 ** 256 - 1;
/// @dev ERC20 transferFrom, modified such that an allowance of MAX_UINT represents an unlimited amount.
/// @param _from Address to transfer from.
/// @param _to Address to transfer to.
/// @param _value Amount to transfer.
/// @return Success of transfer.
function transferFrom(address _from, address _to, uint _value)
public
returns (bool)
{
require(_to != address(0));
uint allowance = allowed[_from][msg.sender];
require(balances[_from] >= _value);
require(allowance >= _value);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
if (allowance < MAX_UINT) {
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
}
emit Transfer(_from, _to, _value);
return true;
}
}
contract ETPlanToken is UnboundedRegularToken {
uint8 constant public decimals = 18;
string constant public name = "ETPlanToken";
string constant public symbol = "ELS";
constructor() public {
totalSupply = 33 * 10 ** 25;
balances[msg.sender] = totalSupply;
emit Transfer(address(0), msg.sender, totalSupply);
}
}