Address Contract Partially Verified
Address
0x2Fc246aA66F0da5bB1368F688548ecBBE9bdee5d
Balance
0 ETH
Nonce
1
Code Size
10538 bytes
Creator
0x3f11bcFe...88fe at tx 0x5e0259e8...4b2b80
Indexed Transactions
0 (1 on-chain, 1.5% indexed)
Contract Bytecode
10538 bytes
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Verified Source Code Partial Match
Compiler: v0.4.24+commit.e67f0147
EVM: byzantium
Optimization: No
TemcoToken.sol 228 lines
pragma solidity ^0.4.24;
import "./Ownable.sol";
import "./ERC20.sol";
import "./SafeMath.sol";
import "./Lockable.sol";
/**
* @title TEMCO token
* @dev Based on code by https://https://github.com/OpenZeppelin/zeppelin-solidity
* @author Geunil(Brian) Lee
*/
contract TemcoToken is ERC20, Ownable, Lockable {
using SafeMath for uint256;
event OwnedValue(address owner, uint256 value);
event Mint(address to, uint256 amount);
event MintFinished();
event Burn(address burner, uint256 value);
mapping(address => uint256) public balances;
mapping (address => mapping (address => uint256)) internal allowed;
uint256 public totalSupply;
function totalSupply() public view returns (uint256) {
return totalSupply;
}
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 18;
bool public mintingFinished = false;
/**
* Constructor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor (
uint256 initialSupply,
string tokenName,
string tokenSymbol
)public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
emit OwnedValue(msg.sender, 0);
balances[msg.sender] = totalSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
}
/**
* @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 whenNotLockedUp returns (bool) {
emit OwnedValue(msg.sender, _value);
require(_to != address(0));
require(_to != address(this));
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);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @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(_to != address(this));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
if(nolockedUp(_from) == false){
return false;
}
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 whenNotLockedUp returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query 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];
}
/**
* @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) whenNotLockedUp 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) whenNotLockedUp 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;
}
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) external onlyOwner {
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);
emit Burn(burner, _value);
emit Transfer(burner, address(0), _value);
}
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 external returns (bool) {
require(_to != address(0) && _amount > 0);
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 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 mintTo(address _from, address _to, uint256 _amount) onlyOwner canMint external returns (bool) {
require(_from != address(0) && _to != address(0) && _amount > 0);
balances[_from] = balances[_from].sub(_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 external returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
ERC20.sol 16 lines
pragma solidity ^0.4.24;
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 {
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);
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);
}
Lockable.sol 65 lines
pragma solidity ^0.4.24;
import "./Ownable.sol";
/**
* @title Lockable
* @dev lock up token transfer during duration. This helps lock up private and pre-sale investor cannot sell token certain period.
* @author Geunil(Brian) Lee
*/
contract Lockable is Ownable {
/**
* @dev hold lock up address and duration
*/
mapping(address => uint256) public lockedUp;
uint public nowTime;
constructor () public {
nowTime = now;
}
/**
* @dev lock up by pass when duration is passed or not exist on lockedUp mapping.
*/
modifier whenNotLockedUp() {
require(lockedUp[msg.sender] < now || lockedUp[msg.sender] == 0 );
_;
}
/**
* @dev lock up status
* @return true - no lock up. false - locked up
*/
function nolockedUp(address sender) public view returns (bool){
if(lockedUp[sender] < now || lockedUp[sender] == 0){
return true;
}
return false;
}
/**
* @dev add lock up investor to mapping
* @param _investor lock up address
* @param _duration lock up period. unit is days
*/
function addLockUp(address _investor, uint _duration ) onlyOwner public {
require(_investor != address(0) && _duration > 0);
lockedUp[_investor] = now + _duration * 1 days;
}
/**
* @dev remove lock up address from mapping
* @param _investor lock up address to be removed from mapping
*/
function removeLockUp(address _investor ) onlyOwner public {
require(_investor != address(0));
delete lockedUp[_investor];
}
}
Ownable.sol 59 lines
pragma solidity ^0.4.24;
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
* based on https://https://github.com/OpenZeppelin/zeppelin-solidity. modified to have multiple ownership.
* @author Geunil(Brian) Lee
*/
contract Ownable {
/**
* Ownership can be owned by multiple owner. Useful when have multiple contract to communicate each other
**/
mapping (address => bool) public owner;
event OwnershipAdded(address newOwner);
event OwnershipRemoved(address noOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor () public {
owner[msg.sender] = true;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner[msg.sender] == true);
_;
}
/**
* @dev Add ownership
* @param _newOwner add address to the ownership
*/
function addOwnership(address _newOwner) public onlyOwner {
require(_newOwner != address(0));
owner[_newOwner] = true;
emit OwnershipAdded(_newOwner);
}
/**
* @dev Remove ownership
* @param _ownership remove ownership
*/
function removeOwner(address _ownership) public onlyOwner{
require(_ownership != address(0));
// owner cannot remove ownerhip itself
require(msg.sender != _ownership);
delete owner[_ownership];
emit OwnershipRemoved(_ownership);
}
}
SafeMath.sol 49 lines
pragma solidity ^0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
* based on https://https://github.com/OpenZeppelin/zeppelin-solidity.
*/
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;
}
}
Read Contract
allowance 0xdd62ed3e → uint256
balanceOf 0x70a08231 → uint256
balances 0x27e235e3 → uint256
decimals 0x313ce567 → uint8
lockedUp 0x84245968 → uint256
mintingFinished 0x05d2035b → bool
name 0x06fdde03 → string
nolockedUp 0x1506c7a8 → bool
nowTime 0x335f1b37 → uint256
owner 0x666e1b39 → bool
symbol 0x95d89b41 → string
totalSupply 0x18160ddd → uint256
Write Contract 13 functions
These functions modify contract state and require a wallet transaction to execute.
addLockUp 0xf342700a
address _investor
uint256 _duration
addOwnership 0xf5a55ff6
address _newOwner
approve 0x095ea7b3
address _spender
uint256 _value
returns: bool
burn 0x42966c68
uint256 _value
decreaseApproval 0x66188463
address _spender
uint256 _subtractedValue
returns: bool
finishMinting 0x7d64bcb4
No parameters
returns: bool
increaseApproval 0xd73dd623
address _spender
uint256 _addedValue
returns: bool
mint 0x40c10f19
address _to
uint256 _amount
returns: bool
mintTo 0xef9bcb27
address _from
address _to
uint256 _amount
returns: bool
removeLockUp 0x81b8c598
address _investor
removeOwner 0x173825d9
address _ownership
transfer 0xa9059cbb
address _to
uint256 _value
returns: bool
transferFrom 0x23b872dd
address _from
address _to
uint256 _value
returns: bool
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