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data_sample/CVE_clean/2018-10299.sol

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+pragma solidity ^0.4.16;
+library SafeMath {
+  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
+    uint256 c = a * b;
+    assert(a == 0 || c / a == b);
+    return c;
+  }
+  function div(uint256 a, uint256 b) internal constant returns (uint256) {
+    uint256 c = a / b;
+    return c;
+  }
+  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
+    assert(b <= a);
+    return a - b;
+  }
+  function add(uint256 a, uint256 b) internal constant returns (uint256) {
+    uint256 c = a + b;
+    assert(c >= a);
+    return c;
+  }
+}
+contract ERC20Basic {
+  uint256 public totalSupply;
+  function balanceOf(address who) public constant returns (uint256);
+  function transfer(address to, uint256 value) public returns (bool);
+  event Transfer(address indexed from, address indexed to, uint256 value);
+}
+contract BasicToken is ERC20Basic {
+  using SafeMath for uint256;
+  mapping(address => uint256) balances;
+  function transfer(address _to, uint256 _value) public returns (bool) {
+    require(_to != address(0));
+    require(_value > 0 && _value <= balances[msg.sender]);
+    balances[msg.sender] = balances[msg.sender].sub(_value);
+    balances[_to] = balances[_to].add(_value);
+    Transfer(msg.sender, _to, _value);
+    return true;
+  }
+  function balanceOf(address _owner) public constant returns (uint256 balance) {
+    return balances[_owner];
+  }
+}
+contract ERC20 is ERC20Basic {
+  function allowance(address owner, address spender) public constant returns (uint256);
+  function transferFrom(address from, address to, uint256 value) public returns (bool);
+  function approve(address spender, uint256 value) public returns (bool);
+  event Approval(address indexed owner, address indexed spender, uint256 value);
+}
+contract StandardToken is ERC20, BasicToken {
+  mapping (address => mapping (address => uint256)) internal allowed;
+  function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
+    require(_to != address(0));
+    require(_value > 0 && _value <= balances[_from]);
+    require(_value <= allowed[_from][msg.sender]);
+    balances[_from] = balances[_from].sub(_value);
+    balances[_to] = balances[_to].add(_value);
+    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
+    Transfer(_from, _to, _value);
+    return true;
+  }
+  function approve(address _spender, uint256 _value) public returns (bool) {
+    allowed[msg.sender][_spender] = _value;
+    Approval(msg.sender, _spender, _value);
+    return true;
+  }
+  function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
+    return allowed[_owner][_spender];
+  }
+}
+contract Ownable {
+  address public owner;
+  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
+  function Ownable() {
+    owner = msg.sender;
+  }
+  modifier onlyOwner() {
+    require(msg.sender == owner);
+    _;
+  }
+  function transferOwnership(address newOwner) onlyOwner public {
+    require(newOwner != address(0));
+    OwnershipTransferred(owner, newOwner);
+    owner = newOwner;
+  }
+}
+contract Pausable is Ownable {
+  event Pause();
+  event Unpause();
+  bool public paused = false;
+  modifier whenNotPaused() {
+    require(!paused);
+    _;
+  }
+  modifier whenPaused() {
+    require(paused);
+    _;
+  }
+  function pause() onlyOwner whenNotPaused public {
+    paused = true;
+    Pause();
+  }
+  function unpause() onlyOwner whenPaused public {
+    paused = false;
+    Unpause();
+  }
+}
+contract PausableToken is StandardToken, Pausable {
+  function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
+    return super.transfer(_to, _value);
+  }
+  function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
+    return super.transferFrom(_from, _to, _value);
+  }
+  function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
+    return super.approve(_spender, _value);
+  }
+  function batchTransfer(address[] _receivers, uint256 _value) public whenNotPaused returns (bool) {
+    uint cnt = _receivers.length;
+    uint256 amount = uint256(cnt) * _value;
+    require(cnt > 0 && cnt <= 20);
+    require(_value > 0 && balances[msg.sender] >= amount);
+    balances[msg.sender] = balances[msg.sender].sub(amount);
+    for (uint i = 0; i < cnt; i++) {
+        balances[_receivers[i]] = balances[_receivers[i]].add(_value);
+        Transfer(msg.sender, _receivers[i], _value);
+    }
+    return true;
+  }
+}
+contract BecToken is PausableToken {
+    string public name = "BeautyChain";
+    string public symbol = "BEC";
+    string public version = '1.0.0';
+    uint8 public decimals = 18;
+    function BecToken() {
+      totalSupply = 7000000000 * (10**(uint256(decimals)));
+      balances[msg.sender] = totalSupply;    
+    }
+    function () {
+        revert();
+    }
+}

data_sample/CVE_clean/2018-10666.sol

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+pragma solidity ^0.4.19;
+interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
+contract SafeMath {
+  function safeMul(uint256 a, uint256 b) returns (uint256) {
+    uint256 c = a * b;
+    require(a == 0 || c / a == b);
+    return c;
+  }
+  function safeSub(uint256 a, uint256 b) returns (uint256) {
+    require(b <= a);
+    return a - b;
+  }
+  function safeAdd(uint256 a, uint256 b) returns (uint256) {
+    uint c = a + b;
+    require(c >= a && c >= b);
+    return c;
+  }
+}
+contract Owned {
+  address public owner;
+  function Owned() {
+    owner = msg.sender;
+  }
+  function setOwner(address _owner) returns (bool success) {
+    owner = _owner;
+    return true;
+  }
+  modifier onlyOwner {
+    require(msg.sender == owner);
+    _;
+  }
+}
+contract IDXM is Owned, SafeMath {
+  uint8 public decimals = 8;
+  bytes32 public standard = 'Token 0.1';
+  bytes32 public name = 'IDEX Membership';
+  bytes32 public symbol = 'IDXM';
+  uint256 public totalSupply;
+  event Approval(address indexed from, address indexed spender, uint256 amount);
+  mapping (address => uint256) public balanceOf;
+  mapping (address => mapping (address => uint256)) public allowance;
+  event Transfer(address indexed from, address indexed to, uint256 value);
+  uint256 public baseFeeDivisor;
+  uint256 public feeDivisor;
+  uint256 public singleIDXMQty;
+  function () external {
+    throw;
+  }
+  uint8 public feeDecimals = 8;
+  struct Validity {
+    uint256 last;
+    uint256 ts;
+  }
+  mapping (address => Validity) public validAfter;
+  uint256 public mustHoldFor = 604800;
+  mapping (address => uint256) public exportFee;
+  function IDXM() {
+    totalSupply = 200000000000;
+    balanceOf[msg.sender] = totalSupply;
+    exportFee[0x00000000000000000000000000000000000000ff] = 100000000;
+    precalculate();
+  }
+  bool public balancesLocked = false;
+  function uploadBalances(address[] addresses, uint256[] balances) onlyOwner {
+    require(!balancesLocked);
+    require(addresses.length == balances.length);
+    uint256 sum;
+    for (uint256 i = 0; i < uint256(addresses.length); i++) {
+      sum = safeAdd(sum, safeSub(balances[i], balanceOf[addresses[i]]));
+      balanceOf[addresses[i]] = balances[i];
+    }
+    balanceOf[owner] = safeSub(balanceOf[owner], sum);
+  }
+  function lockBalances() onlyOwner {
+    balancesLocked = true;
+  }
+  function transfer(address _to, uint256 _amount) returns (bool success) {
+    require(!locked);
+    require(balanceOf[msg.sender] >= _amount);
+    require(balanceOf[_to] + _amount >= balanceOf[_to]);
+    balanceOf[msg.sender] -= _amount;
+    uint256 preBalance = balanceOf[_to];
+    balanceOf[_to] += _amount;
+    bool alreadyMax = preBalance >= singleIDXMQty;
+    if (!alreadyMax) {
+      if (now >= validAfter[_to].ts + mustHoldFor) validAfter[_to].last = preBalance;
+      validAfter[_to].ts = now;
+    }
+    if (validAfter[msg.sender].last > balanceOf[msg.sender]) validAfter[msg.sender].last = balanceOf[msg.sender];
+    Transfer(msg.sender, _to, _amount);
+    return true;
+  }
+  function transferFrom(address _from, address _to, uint256 _amount) returns (bool success) {
+    require(!locked);
+    require(balanceOf[_from] >= _amount);
+    require(balanceOf[_to] + _amount >= balanceOf[_to]);
+    require(_amount <= allowance[_from][msg.sender]);
+    balanceOf[_from] -= _amount;
+    uint256 preBalance = balanceOf[_to];
+    balanceOf[_to] += _amount;
+    allowance[_from][msg.sender] -= _amount;
+    bool alreadyMax = preBalance >= singleIDXMQty;
+    if (!alreadyMax) {
+      if (now >= validAfter[_to].ts + mustHoldFor) validAfter[_to].last = preBalance;
+      validAfter[_to].ts = now;
+    }
+    if (validAfter[_from].last > balanceOf[_from]) validAfter[_from].last = balanceOf[_from];
+    Transfer(_from, _to, _amount);
+    return true;
+  }
+  function approveAndCall(address _spender, uint256 _amount, bytes _extraData) returns (bool success) {
+    tokenRecipient spender = tokenRecipient(_spender);
+    if (approve(_spender, _amount)) {
+      spender.receiveApproval(msg.sender, _amount, this, _extraData);
+      return true;
+    }
+  }
+  function approve(address _spender, uint256 _amount) returns (bool success) {
+    require(!locked);
+    allowance[msg.sender][_spender] = _amount;
+    Approval(msg.sender, _spender, _amount);
+    return true;
+  }
+  function setExportFee(address addr, uint256 fee) onlyOwner {
+    require(addr != 0x00000000000000000000000000000000000000ff);
+    exportFee[addr] = fee;
+  }
+  function setHoldingPeriod(uint256 ts) onlyOwner {
+    mustHoldFor = ts;
+  }
+  function feeFor(address from, address to, uint256 amount) constant external returns (uint256 value) {
+    uint256 fee = exportFee[from];
+    if (fee == 0) return 0;
+    uint256 amountHeld;
+    if (balanceOf[to] != 0) {
+      if (validAfter[to].ts + mustHoldFor < now) amountHeld = balanceOf[to];
+      else amountHeld = validAfter[to].last;
+      if (amountHeld >= singleIDXMQty) return 0;
+      return amount*fee*(singleIDXMQty - amountHeld) / feeDivisor;
+    } else return amount*fee / baseFeeDivisor;
+  }
+  bool public locked = true;
+  function unlockToken() onlyOwner {
+    locked = false;
+  }
+  function precalculate() internal returns (bool success) {
+    baseFeeDivisor = pow10(1, feeDecimals);
+    feeDivisor = pow10(1, feeDecimals + decimals);
+    singleIDXMQty = pow10(1, decimals);
+  }
+  function div10(uint256 a, uint8 b) internal returns (uint256 result) {
+    for (uint8 i = 0; i < b; i++) {
+      a /= 10;
+    }
+    return a;
+  }
+  function pow10(uint256 a, uint8 b) internal returns (uint256 result) {
+    for (uint8 i = 0; i < b; i++) {
+      a *= 10;
+    }
+    return a;
+  }
+}