Contract Source Code:
File 1 of 1 : meme000032
pragma solidity 0.5.17;
contract meme000032 {
using SafeMath for uint256;
// State variables
string public name;
string public symbol;
uint8 public decimals;
uint256 private _totalSupply;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
// Events as per ERC20 standard
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
constructor(
string memory tokenName,
string memory tokenSymbol,
uint8 decimalUnits,
uint256 initialSupply
) public {
name = tokenName;
symbol = tokenSymbol;
decimals = decimalUnits;
_totalSupply = initialSupply * (10 ** uint256(decimals));
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
// Core ERC20 transfer functions
function transfer(address recipient, uint256 amount) public returns (bool) {
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[msg.sender] = _balances[msg.sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(msg.sender, recipient, amount);
return true;
}
function approve(address spender, uint256 amount) public returns (bool) {
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
_allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount);
emit Transfer(sender, recipient, amount);
return true;
}
// Public functions
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
}
// SafeMath library for arithmetic operations
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
}