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ERC-20
Overview
Max Total Supply
231,000,000,000 UCX
Holders
16,800
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 0 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
UNIVERSALCoin
Compiler Version
v0.4.18+commit.9cf6e910
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2018-10-24 */ pragma solidity ^0.4.18; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ 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) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold 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; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0)); OwnershipTransferred(owner, newOwner); owner = newOwner; } } /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/179 */ contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public view 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); } /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) balances; uint256 totalSupply_; /** * @dev total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); // SafeMath.sub will throw if there is not enough balance. balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } } /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * @dev https://github.com/ethereum/EIPs/issues/20 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_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; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance(address _owner, address _spender) public view returns (uint256) { return allowed[_owner][_spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval(address _spender, uint _addedValue) public returns (bool) { allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue); Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) { uint oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } /** * @title Mintable token * @dev Simple ERC20 Token example, with mintable token creation * @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120 * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol */ contract MintableToken is StandardToken, Ownable { event Mint(address indexed to, uint256 amount); event MintFinished(); bool public mintingFinished = false; modifier canMint() { require(!mintingFinished); _; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) { totalSupply_ = totalSupply_.add(_amount); balances[_to] = balances[_to].add(_amount); Mint(_to, _amount); Transfer(address(0), _to, _amount); return true; } /** * @dev Function to stop minting new tokens. * @return True if the operation was successful. */ function finishMinting() onlyOwner canMint public returns (bool) { mintingFinished = true; MintFinished(); return true; } } /** * @title Capped token * @dev Mintable token with a token cap. */ contract CappedToken is MintableToken { uint256 public cap; function CappedToken(uint256 _cap) public { require(_cap > 0); cap = _cap; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) { require(totalSupply_.add(_amount) <= cap); return super.mint(_to, _amount); } } /** * @title Burnable Token * @dev Token that can be irreversibly burned (destroyed). */ contract BurnableToken is BasicToken { event Burn(address indexed burner, uint256 value); /** * @dev Burns a specific amount of tokens. * @param _value The amount of token to be burned. */ function burn(uint256 _value) public { require(_value <= balances[msg.sender]); // no need to require value <= totalSupply, since that would imply the // sender's balance is greater than the totalSupply, which *should* be an assertion failure address burner = msg.sender; balances[burner] = balances[burner].sub(_value); totalSupply_ = totalSupply_.sub(_value); Burn(burner, _value); } } /** * @title Pausable * @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is Ownable { event Pause(); event Unpause(); bool public paused = false; /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() onlyOwner whenNotPaused public { paused = true; Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() onlyOwner whenPaused public { paused = false; Unpause(); } } /** * @title Pausable token * @dev StandardToken modified with pausable transfers. **/ 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 increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) { return super.increaseApproval(_spender, _addedValue); } function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) { return super.decreaseApproval(_spender, _subtractedValue); } } contract UNIVERSALCoin is StandardToken { string public constant name = 'UNIVERSAL Coin'; string public constant symbol = 'UCX'; uint8 public constant decimals = 0; function UNIVERSALCoin () public payable { uint premintAmount = 231000000000*10**uint(decimals); totalSupply_ = totalSupply_.add(premintAmount); balances[msg.sender] = balances[msg.sender].add(premintAmount); Transfer(address(0), msg.sender, premintAmount); } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Contract Creation Code
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Deployed Bytecode
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Swarm Source
bzzr://f2172b377df451b32b237e8f2d1f0e5fcd6ca303915346f4e2c52866bbe6a413
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