ERC-20
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Overview
Max Total Supply
11,499,999,988.999999999989999985 DTA
Holders
185,181 ( 0.001%)
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
10 DTAValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
DataToken
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 2018-02-09 */ pragma solidity ^0.4.18; contract ERC20 { uint256 public totalSupply; event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); function allowance(address owner, address spender) public view returns (uint256); function approve(address spender, uint256 value) public returns (bool); function transferFrom(address from, address to, uint256 value) public returns (bool); } interface TokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; } contract TokenERC20 is ERC20 { // Public variables of the token string public name; string public symbol; uint8 public decimals = 18; // 18 decimals is the strongly suggested default, avoid changing it // Balances mapping (address => uint256) balances; // Allowances mapping (address => mapping (address => uint256)) allowances; // ----- Events ----- event Burn(address indexed from, uint256 value); /** * Constructor function */ function TokenERC20(uint256 _initialSupply, string _tokenName, string _tokenSymbol, uint8 _decimals) public { name = _tokenName; // Set the name for display purposes symbol = _tokenSymbol; // Set the symbol for display purposes decimals = _decimals; totalSupply = _initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount balances[msg.sender] = totalSupply; // Give the creator all initial tokens } function balanceOf(address _owner) public view returns(uint256) { return balances[_owner]; } function allowance(address _owner, address _spender) public view returns (uint256) { return allowances[_owner][_spender]; } /** * Internal transfer, only can be called by this contract */ function _transfer(address _from, address _to, uint _value) internal returns(bool) { // Prevent transfer to 0x0 address. Use burn() instead require(_to != 0x0); // Check if the sender has enough require(balances[_from] >= _value); // Check for overflows require(balances[_to] + _value > balances[_to]); // Save this for an assertion in the future uint previousBalances = balances[_from] + balances[_to]; // Subtract from the sender balances[_from] -= _value; // Add the same to the recipient balances[_to] += _value; Transfer(_from, _to, _value); // Asserts are used to use static analysis to find bugs in your code. They should never fail assert(balances[_from] + balances[_to] == previousBalances); return true; } /** * Transfer tokens * * Send `_value` tokens to `_to` from your account * * @param _to The address of the recipient * @param _value the amount to send */ function transfer(address _to, uint256 _value) public returns(bool) { return _transfer(msg.sender, _to, _value); } /** * Transfer tokens from other address * * Send `_value` tokens to `_to` in behalf of `_from` * * @param _from The address of the sender * @param _to The address of the recipient * @param _value the amount to send */ function transferFrom(address _from, address _to, uint256 _value) public returns(bool) { require(_value <= allowances[_from][msg.sender]); // Check allowance allowances[_from][msg.sender] -= _value; return _transfer(_from, _to, _value); } /** * Set allowance for other address * * Allows `_spender` to spend no more than `_value` tokens in your behalf * * @param _spender The address authorized to spend * @param _value the max amount they can spend */ function approve(address _spender, uint256 _value) public returns(bool) { allowances[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } /** * Set allowance for other address and notify * * Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it * * @param _spender The address authorized to spend * @param _value the max amount they can spend * @param _extraData some extra information to send to the approved contract */ function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns(bool) { if (approve(_spender, _value)) { TokenRecipient spender = TokenRecipient(_spender); spender.receiveApproval(msg.sender, _value, this, _extraData); return true; } return false; } /** * Destroy tokens * * Remove `_value` tokens from the system irreversibly * * @param _value the amount of money to burn */ function burn(uint256 _value) public returns(bool) { require(balances[msg.sender] >= _value); // Check if the sender has enough balances[msg.sender] -= _value; // Subtract from the sender totalSupply -= _value; // Updates totalSupply Burn(msg.sender, _value); return true; } /** * Destroy tokens from other account * * Remove `_value` tokens from the system irreversibly on behalf of `_from`. * * @param _from the address of the sender * @param _value the amount of money to burn */ function burnFrom(address _from, uint256 _value) public returns(bool) { require(balances[_from] >= _value); // Check if the targeted balance is enough require(_value <= allowances[_from][msg.sender]); // Check allowance balances[_from] -= _value; // Subtract from the targeted balance allowances[_from][msg.sender] -= _value; // Subtract from the sender's allowance totalSupply -= _value; // Update totalSupply Burn(_from, _value); return true; } /** * approve should be called when allowances[_spender] == 0. To increment * allowances value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol */ function increaseApproval(address _spender, uint _addedValue) public returns (bool) { // Check for overflows require(allowances[msg.sender][_spender] + _addedValue > allowances[msg.sender][_spender]); allowances[msg.sender][_spender] += _addedValue; Approval(msg.sender, _spender, allowances[msg.sender][_spender]); return true; } function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) { uint oldValue = allowances[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowances[msg.sender][_spender] = 0; } else { allowances[msg.sender][_spender] = oldValue - _subtractedValue; } Approval(msg.sender, _spender, allowances[msg.sender][_spender]); return true; } } contract DataToken is TokenERC20 { function DataToken() TokenERC20(11500000000, "Data Token", "DTA", 18) public { } }
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://12029d144dd9d20a347b891f62e0c857faabc19fabca0c3421a2d1299254765e
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