Le Token (LEB) is an ERC-20 airdrop token from July 2018 whose 2 billion LEB supply anyone could claim through a public getTokens() function.
Token Information
Key Facts
Heuristic Analysis
The following characteristics were detected through bytecode analysis and may not be accurate.
Byzantium Era
First Metropolis hard fork. Added zk-SNARK precompiles, REVERT opcode, and staticcall.
Bytecode Overview
Verified Source Available
This contract has verified source code on Etherscan.
Show source code (Solidity)
{{
"sources": {
"LEB.sol": {
"content": "// Submitted by EthereumHistory (ethereumhistory.com)\npragma solidity ^0.4.21;\n\n\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a / b;\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract ForeignToken {\n function balanceOf(address _owner) constant public returns (uint256);\n function transfer(address _to, uint256 _value) public returns (bool);\n}\n\ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) public constant returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) public constant returns (uint256);\n function transferFrom(address from, address to, uint256 value) public returns (bool);\n function approve(address spender, uint256 value) public returns (bool);\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n\ninterface Token {\n function distr(address _to, uint256 _value) public returns (bool) ;\n function totalSupply() constant public returns (uint256 supply);\n function balanceOf(address _owner) constant public returns (uint256 balance);\n}\n\ncontract LEB is ERC20 {\n\n using SafeMath for uint256;\n address owner = msg.sender;\n\n mapping (address => uint256) balances;\n mapping (address => mapping (address => uint256)) allowed;\n mapping (address => bool) public blacklist;\n\n string public constant name = \"Le Token\";\n string public constant symbol = \"LEB\";\n uint public constant decimals = 18;\n\n uint256 public totalSupply = 2000000000e18;\n uint256 public totalDistributed = 2000000000e18;\n uint256 public totalRemaining = totalSupply.sub(totalDistributed);\n uint256 public value;\n\n mapping (address => bool) public frozenAccount;\n event FrozenFunds(address target, bool frozen);\n\n event Transfer(address indexed _from, address indexed _to, uint256 _value);\n event Approval(address indexed _owner, address indexed _spender, uint256 _value);\n\n event Distr(address indexed to, uint256 amount);\n event DistrFinished();\n\n event Burn(address indexed burner, uint256 value);\n\n bool public distributionFinished = false;\n\n modifier canDistr() {\n require(!distributionFinished);\n _;\n }\n\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n modifier onlyWhitelist() {\n require(blacklist[msg.sender] == false);\n _;\n }\n\n constructor () public {\n owner = msg.sender;\n value = 100e18;\n //distr(owner, totalDistributed);\n balances[owner] += totalDistributed;\n emit Transfer(address(0), owner, totalDistributed);\n }\n\n function transferOwnership(address newOwner) onlyOwner public {\n if (newOwner != address(0)) {\n owner = newOwner;\n }\n }\n\n function freezeAccount(address target, bool freeze) onlyOwner public {\n frozenAccount[target] = freeze;\n emit FrozenFunds(target, freeze);\n }\n \n\n function enableWhitelist(address[] addresses) onlyOwner public {\n for (uint i = 0; i < addresses.length; i++) {\n blacklist[addresses[i]] = false;\n }\n }\n\n function disableWhitelist(address[] addresses) onlyOwner public {\n for (uint i = 0; i < addresses.length; i++) {\n blacklist[addresses[i]] = true;\n }\n }\n\n function finishDistribution() onlyOwner canDistr public returns (bool) {\n distributionFinished = true;\n emit DistrFinished();\n return true;\n }\n\n function distr(address _to, uint256 _amount) canDistr private returns (bool) {\n totalDistributed = totalDistributed.add(_amount);\n totalRemaining = totalRemaining.sub(_amount);\n balances[_to] = balances[_to].add(_amount);\n emit Distr(_to, _amount);\n emit Transfer(address(0), _to, _amount);\n return true;\n\n if (totalDistributed >= totalSupply) {\n distributionFinished = true;\n }\n }\n\n function airdrop(address[] addresses) onlyOwner canDistr public {\n\n require(addresses.length <= 255);\n require(value <= totalRemaining);\n\n for (uint i = 0; i < addresses.length; i++) {\n require(value <= totalRemaining);\n distr(addresses[i], value);\n }\n\n if (totalDistributed >= totalSupply) {\n distributionFinished = true;\n }\n }\n\n function distribution(address[] addresses, uint256 amount) onlyOwner canDistr public {\n\n require(addresses.length <= 255);\n require(amount <= totalRemaining);\n\n for (uint i = 0; i < addresses.length; i++) {\n require(amount <= totalRemaining);\n distr(addresses[i], amount);\n }\n\n if (totalDistributed >= totalSupply) {\n distributionFinished = true;\n }\n }\n\n function distributeAmounts(address[] addresses, uint256[] amounts) onlyOwner canDistr public {\n\n require(addresses.length <= 255);\n require(addresses.length == amounts.length);\n\n for (uint8 i = 0; i < addresses.length; i++) {\n require(amounts[i] <= totalRemaining);\n distr(addresses[i], amounts[i]);\n\n if (totalDistributed >= totalSupply) {\n distributionFinished = true;\n }\n }\n }\n\n function () external payable {\n getTokens();\n }\n\n function getTokens() payable canDistr onlyWhitelist public {\n\n if (value > totalRemaining) {\n value = totalRemaining;\n }\n\n require(value <= totalRemaining);\n\n address investor = msg.sender;\n uint256 toGive = value;\n\n distr(investor, toGive);\n\n if (toGive > 0) {\n blacklist[investor] = true;\n }\n\n if (totalDistributed >= totalSupply) {\n distributionFinished = true;\n }\n\n value = value.div(100000).mul(99999);\n }\n\n function balanceOf(address _owner) constant public returns (uint256) {\n\t return balances[_owner];\n }\n\n // mitigates the ERC20 short address attack\n modifier onlyPayloadSize(uint size) {\n assert(msg.data.length >= size + 4);\n _;\n }\n\n function transfer(address _to, uint256 _amount) onlyPayloadSize(2 * 32) public returns (bool success) {\n\n require(_to != address(0));\n require(_amount <= balances[msg.sender]);\n require(!frozenAccount[msg.sender]);\n\n balances[msg.sender] = balances[msg.sender].sub(_amount);\n balances[_to] = balances[_to].add(_amount);\n emit Transfer(msg.sender, _to, _amount);\n return true;\n }\n\n function transferFrom(address _from, address _to, uint256 _amount) onlyPayloadSize(2 * 32) public returns (bool success) {\n\n require(_to != address(0));\n require(_amount <= balances[_from]);\n require(_amount <= allowed[_from][msg.sender]);\n require(!frozenAccount[msg.sender]);\n\n balances[_from] = balances[_from].sub(_amount);\n allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);\n balances[_to] = balances[_to].add(_amount);\n emit Transfer(_from, _to, _amount);\n return true;\n }\n\n function approve(address _spender, uint256 _value) public returns (bool success) {\n // mitigates the ERC20 spend/approval race condition\n if (_value != 0 && allowed[msg.sender][_spender] != 0) { return false; }\n allowed[msg.sender][_spender] = _value;\n emit Approval(msg.sender, _spender, _value);\n return true;\n }\n\n function allowance(address _owner, address _spender) constant public returns (uint256) {\n return allowed[_owner][_spender];\n }\n\n function getTokenBalance(address tokenAddress, address who) constant public returns (uint){\n ForeignToken t = ForeignToken(tokenAddress);\n uint bal = t.balanceOf(who);\n return bal;\n }\n\n function withdraw() onlyOwner public {\n uint256 etherBalance = address(this).balance;\n owner.transfer(etherBalance);\n }\n\n function burn(uint256 _value) onlyOwner public {\n require(_value <= balances[msg.sender]);\n // no need to require value <= totalSupply, since that would imply the\n // sender's balance is greater than the totalSupply, which *should* be an assertion failure\n\n address burner = msg.sender;\n balances[burner] = balances[burner].sub(_value);\n totalSupply = totalSupply.sub(_value);\n totalDistributed = totalDistributed.sub(_value);\n emit Burn(burner, _value);\n }\n\n function withdrawForeignTokens(address _tokenContract) onlyOwner public returns (bool) {\n ForeignToken token = ForeignToken(_tokenContract);\n uint256 amount = token.balanceOf(address(this));\n return token.transfer(owner, amount);\n }\n}"
}
},
"language": "Solidity",
"settings": {
"optimizer": {
"runs": 200,
"enabled": true
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}
}}External Links
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