Adding WSB Token sol file

Author: Chainsulting - DLT Consulting & Development

Wallstreetbets/wsb_token.sol

@@ -0,0 +1,192 @@
+pragma solidity ^0.5.0;
+
+/**
+ * @dev Wrappers over Solidity's arithmetic operations with added overflow
+ * checks.
+ *
+ * Arithmetic operations in Solidity wrap on overflow. This can easily result
+ * in bugs, because programmers usually assume that an overflow raises an
+ * error, which is the standard behavior in high level programming languages.
+ * `SafeMath` restores this intuition by reverting the transaction when an
+ * operation overflows.
+ *
+ * Using this library instead of the unchecked operations eliminates an entire
+ * class of bugs, so it's recommended to use it always.
+ */
+
+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);
+  }
+}
+
+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);
+
+  event Transfer(address indexed from, address indexed to, uint256 value);
+  event Approval(address indexed owner, address indexed spender, uint256 value);
+}
+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 WallstreetbetsToken is ERC20Detailed {
+
+  using SafeMath for uint256;
+  mapping (address => uint256) private _balances;
+  mapping (address => mapping (address => uint256)) private _allowed;
+
+  string constant tokenName = "Wallstreetbets";
+  string constant tokenSymbol = "WSB";
+  uint8  constant tokenDecimals = 18;
+  uint256 _totalSupply = 1E27;
+
+  constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
+    _mint(msg.sender, _totalSupply);
+  }
+
+  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 transfer(address to, uint256 value) public returns (bool) {
+    require(value <= _balances[msg.sender]);
+    require(to != address(0));
+
+    _balances[msg.sender] = _balances[msg.sender].sub(value);
+    _balances[to] = _balances[to].add(value);
+
+    _totalSupply = _totalSupply.sub(value);
+
+    emit Transfer(msg.sender, to, value);
+    return true;
+  }
+
+  function multiTransfer(address[] memory receivers, uint256[] memory amounts) public {
+    for (uint256 i = 0; i < receivers.length; i++) {
+      transfer(receivers[i], amounts[i]);
+    }
+  }
+
+  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(to != address(0));
+
+    _balances[from] = _balances[from].sub(value);
+    _balances[to] = _balances[to].add(value);
+    _totalSupply = _totalSupply.sub(value);
+
+    _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
+
+    emit Transfer(from, to, value);
+
+    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) internal {
+    require(amount != 0);
+    _balances[account] = _balances[account].add(amount);
+    emit Transfer(address(0), account, amount);
+  }
+
+  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);
+  }
+}