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0x1e9bbc19a64c161407811005b3605d11e0352d8c8ce00de14a2aecc330a2075a | Transfer | (pending) | 19 days ago | IN | 0 ETH | (Pending) | |||
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5552772 | 2395 days ago | Contract Creation | 0 ETH |
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Contract Name:
HoldToken
Compiler Version
v0.4.23+commit.124ca40d
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2018-06-12 */ pragma solidity ^0.4.21; // File: zeppelin-solidity/contracts/math/SafeMath.sol /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { if (a == 0) { return 0; } c = a * b; assert(c / a == b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ 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 a / b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; assert(c >= a); return c; } } // File: zeppelin-solidity/contracts/ownership/Ownable.sol /** * @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)); emit OwnershipTransferred(owner, newOwner); owner = newOwner; } } // File: zeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol /** * @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); } // File: zeppelin-solidity/contracts/token/ERC20/BasicToken.sol /** * @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]); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit 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) { return balances[_owner]; } } // File: zeppelin-solidity/contracts/token/ERC20/ERC20.sol /** * @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); } // File: zeppelin-solidity/contracts/token/ERC20/StandardToken.sol /** * @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); emit 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; emit 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); emit 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); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } // File: zeppelin-solidity/contracts/token/ERC20/MintableToken.sol /** * @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); emit Mint(_to, _amount); emit 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; emit MintFinished(); return true; } } // File: contracts/HoldToken.sol contract HoldToken is MintableToken { using SafeMath for uint256; string public name = 'HOLD'; string public symbol = 'HOLD'; uint8 public decimals = 18; event Burn(address indexed burner, uint256 value); event BurnTransferred(address indexed previousBurner, address indexed newBurner); address burnerRole; modifier onlyBurner() { require(msg.sender == burnerRole); _; } function HoldToken(address _burner) public { burnerRole = _burner; } function transferBurnRole(address newBurner) public onlyBurner { require(newBurner != address(0)); BurnTransferred(burnerRole, newBurner); burnerRole = newBurner; } function burn(uint256 _value) public onlyBurner { require(_value <= balances[msg.sender]); balances[msg.sender] = balances[msg.sender].sub(_value); totalSupply_ = totalSupply_.sub(_value); Burn(msg.sender, _value); Transfer(msg.sender, address(0), _value); } } // File: contracts/Crowdsale.sol /** * @title Crowdsale * @dev Crowdsale is a base contract for managing a token crowdsale. * Crowdsales have a start and end timestamps, where investors can make * token purchases and the crowdsale will assign them tokens based * on a token per ETH rate. Funds collected are forwarded to a wallet * as they arrive. */ contract Crowdsale { using SafeMath for uint256; // The token being sold HoldToken public token; // start and end timestamps where investments are allowed (both inclusive) uint256 public startTime; uint256 public endTime; uint256 public rate; // address where funds are collected address public wallet; // amount of raised money in wei uint256 public weiRaised; /** * event for token purchase logging * @param beneficiary who got the tokens * @param value weis paid for purchase * @param amount amount of tokens purchased * @param transactionId identifier which corresponds to transaction under which the tokens were purchased */ event TokenPurchase(address indexed beneficiary, uint256 indexed value, uint256 indexed amount, uint256 transactionId); function Crowdsale( uint256 _startTime, uint256 _endTime, uint256 _rate, address _wallet, uint256 _initialWeiRaised ) public { require(_startTime >= now); require(_endTime >= _startTime); require(_wallet != address(0)); require(_rate > 0); token = new HoldToken(_wallet); startTime = _startTime; endTime = _endTime; rate = _rate; wallet = _wallet; weiRaised = _initialWeiRaised; } // @return true if crowdsale event has ended function hasEnded() public view returns (bool) { return now > endTime; } } // File: zeppelin-solidity/contracts/token/ERC20/SafeERC20.sol /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure. * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { function safeTransfer(ERC20Basic token, address to, uint256 value) internal { assert(token.transfer(to, value)); } function safeTransferFrom( ERC20 token, address from, address to, uint256 value ) internal { assert(token.transferFrom(from, to, value)); } function safeApprove(ERC20 token, address spender, uint256 value) internal { assert(token.approve(spender, value)); } } // File: zeppelin-solidity/contracts/token/ERC20/TokenTimelock.sol /** * @title TokenTimelock * @dev TokenTimelock is a token holder contract that will allow a * beneficiary to extract the tokens after a given release time */ contract TokenTimelock { using SafeERC20 for ERC20Basic; // ERC20 basic token contract being held ERC20Basic public token; // beneficiary of tokens after they are released address public beneficiary; // timestamp when token release is enabled uint256 public releaseTime; function TokenTimelock(ERC20Basic _token, address _beneficiary, uint256 _releaseTime) public { // solium-disable-next-line security/no-block-members require(_releaseTime > block.timestamp); token = _token; beneficiary = _beneficiary; releaseTime = _releaseTime; } /** * @notice Transfers tokens held by timelock to beneficiary. */ function release() public { // solium-disable-next-line security/no-block-members require(block.timestamp >= releaseTime); uint256 amount = token.balanceOf(this); require(amount > 0); token.safeTransfer(beneficiary, amount); } } // File: contracts/CappedCrowdsale.sol contract CappedCrowdsale is Crowdsale, Ownable { using SafeMath for uint256; uint256 public hardCap; uint256 public tokensToLock; uint256 public releaseTime; bool public isFinalized = false; TokenTimelock public timeLock; event Finalized(); event FinishMinting(); event TokensMinted( address indexed beneficiary, uint256 indexed amount ); function CappedCrowdsale(uint256 _hardCap, uint256 _tokensToLock, uint256 _releaseTime) public { require(_hardCap > 0); require(_tokensToLock > 0); require(_releaseTime > endTime); hardCap = _hardCap; releaseTime = _releaseTime; tokensToLock = _tokensToLock; timeLock = new TokenTimelock(token, wallet, releaseTime); } /** * @dev Must be called after crowdsale ends, to do some extra finalization * work. Calls the contract's finalization function. */ function finalize() onlyOwner public { require(!isFinalized); token.mint(address(timeLock), tokensToLock); Finalized(); isFinalized = true; } function finishMinting() onlyOwner public { require(token.mintingFinished() == false); require(isFinalized); token.finishMinting(); FinishMinting(); } function mint(address beneficiary, uint256 amount) onlyOwner public { require(!token.mintingFinished()); require(isFinalized); require(amount > 0); require(beneficiary != address(0)); token.mint(beneficiary, amount); TokensMinted(beneficiary, amount); } // overriding Crowdsale#hasEnded to add cap logic // @return true if crowdsale event has ended function hasEnded() public view returns (bool) { bool capReached = weiRaised >= hardCap; return super.hasEnded() || capReached || isFinalized; } } // File: contracts/OnlyWhiteListedAddresses.sol contract OnlyWhiteListedAddresses is Ownable { using SafeMath for uint256; address utilityAccount; mapping (address => bool) whitelist; mapping (address => address) public referrals; modifier onlyOwnerOrUtility() { require(msg.sender == owner || msg.sender == utilityAccount); _; } event WhitelistedAddresses( address[] users ); event ReferralsAdded( address[] user, address[] referral ); function OnlyWhiteListedAddresses(address _utilityAccount) public { utilityAccount = _utilityAccount; } function whitelistAddress (address[] users) public onlyOwnerOrUtility { for (uint i = 0; i < users.length; i++) { whitelist[users[i]] = true; } WhitelistedAddresses(users); } function addAddressReferrals (address[] users, address[] _referrals) public onlyOwnerOrUtility { require(users.length == _referrals.length); for (uint i = 0; i < users.length; i++) { require(isWhiteListedAddress(users[i])); referrals[users[i]] = _referrals[i]; } ReferralsAdded(users, _referrals); } function isWhiteListedAddress (address addr) public view returns (bool) { return whitelist[addr]; } } // File: contracts/HoldCrowdsale.sol contract HoldCrowdsale is CappedCrowdsale, OnlyWhiteListedAddresses { using SafeMath for uint256; struct TokenPurchaseRecord { uint256 timestamp; uint256 weiAmount; address beneficiary; } uint256 transactionId = 1; mapping (uint256 => TokenPurchaseRecord) pendingTransactions; mapping (uint256 => bool) completedTransactions; uint256 public referralPercentage; uint256 public individualCap; /** * event for token purchase logging * @param transactionId transaction identifier * @param beneficiary who will get the tokens * @param timestamp when the token purchase request was made * @param weiAmount wei invested */ event TokenPurchaseRequest( uint256 indexed transactionId, address beneficiary, uint256 indexed timestamp, uint256 indexed weiAmount, uint256 tokensAmount ); event ReferralTokensSent( address indexed beneficiary, uint256 indexed tokensAmount, uint256 indexed transactionId ); event BonusTokensSent( address indexed beneficiary, uint256 indexed tokensAmount, uint256 indexed transactionId ); function HoldCrowdsale( uint256 _startTime, uint256 _endTime, uint256 _icoHardCapWei, uint256 _referralPercentage, uint256 _rate, address _wallet, uint256 _tokensToLock, uint256 _releaseTime, uint256 _privateWeiRaised, uint256 _individualCap, address _utilityAccount ) public OnlyWhiteListedAddresses(_utilityAccount) CappedCrowdsale(_icoHardCapWei, _tokensToLock, _releaseTime) Crowdsale(_startTime, _endTime, _rate, _wallet, _privateWeiRaised) { referralPercentage = _referralPercentage; individualCap = _individualCap; } // fallback function can be used to buy tokens function () external payable { buyTokens(msg.sender); } // low level token purchase function function buyTokens(address beneficiary) public payable { require(!isFinalized); require(beneficiary == msg.sender); require(msg.value != 0); require(msg.value >= individualCap); uint256 weiAmount = msg.value; require(isWhiteListedAddress(beneficiary)); require(validPurchase(weiAmount)); // update state weiRaised = weiRaised.add(weiAmount); uint256 _transactionId = transactionId; uint256 tokensAmount = weiAmount.mul(rate); pendingTransactions[_transactionId] = TokenPurchaseRecord(now, weiAmount, beneficiary); transactionId += 1; TokenPurchaseRequest(_transactionId, beneficiary, now, weiAmount, tokensAmount); forwardFunds(); } function issueTokensMultiple(uint256[] _transactionIds, uint256[] bonusTokensAmounts) public onlyOwner { require(isFinalized); require(_transactionIds.length == bonusTokensAmounts.length); for (uint i = 0; i < _transactionIds.length; i++) { issueTokens(_transactionIds[i], bonusTokensAmounts[i]); } } function issueTokens(uint256 _transactionId, uint256 bonusTokensAmount) internal { require(completedTransactions[_transactionId] != true); require(pendingTransactions[_transactionId].timestamp != 0); TokenPurchaseRecord memory record = pendingTransactions[_transactionId]; uint256 tokens = record.weiAmount.mul(rate); address referralAddress = referrals[record.beneficiary]; token.mint(record.beneficiary, tokens); TokenPurchase(record.beneficiary, record.weiAmount, tokens, _transactionId); completedTransactions[_transactionId] = true; if (bonusTokensAmount != 0) { require(bonusTokensAmount != 0); token.mint(record.beneficiary, bonusTokensAmount); BonusTokensSent(record.beneficiary, bonusTokensAmount, _transactionId); } if (referralAddress != address(0)) { uint256 referralAmount = tokens.mul(referralPercentage).div(uint256(100)); token.mint(referralAddress, referralAmount); ReferralTokensSent(referralAddress, referralAmount, _transactionId); } } function validPurchase(uint256 weiAmount) internal view returns (bool) { bool withinCap = weiRaised.add(weiAmount) <= hardCap; bool withinCrowdsaleInterval = now >= startTime && now <= endTime; return withinCrowdsaleInterval && withinCap; } function forwardFunds() internal { wallet.transfer(msg.value); } } // File: contracts/Migrations.sol contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } function Migrations() public { owner = msg.sender; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } function upgrade(address new_address) public restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } }
Contract Security Audit
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Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000008c8675898360d4115e32c0196e8e0a35d4c29840
-----Decoded View---------------
Arg [0] : _burner (address): 0x8c8675898360D4115E32c0196e8e0a35D4c29840
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000008c8675898360d4115e32c0196e8e0a35d4c29840
Swarm Source
bzzr://8a3f88c91ff23d25f3d0c78392671af945fb85c2e97b9a8c13921a8318a1b527
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.