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KOKContract
- Verified, Token
- Fungible Token
- ERC-20
Verified
The following smart contract is an ERC20 token contract named KOKContract. It has a total supply of 5 billion tokens with 18 decimal places. The contract allows for blacklisting of addresses and has a function for airdropping tokens to multiple addresses. The contract also has a stop/start function to pause token transfers. The transfer, transferFrom, approve, and allowance functions are implemented to allow for token transfers and approvals.
0x9b9647431632af44be02ddd22477ed94d14aacaa
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pragma solidity ^0.4.21;
// smart contract for KOK coin
// ownership contract
contract Owned {
address public owner;
event TransferOwnership(address oldaddr, address newaddr);
modifier onlyOwner() { if (msg.sender != owner) return; _; }
function Owned() public {
owner = msg.sender;
}
function transferOwnership(address _new) onlyOwner public {
address oldaddr = owner;
owner = _new;
emit TransferOwnership(oldaddr, owner);
}
}
// erc20
contract ERC20Interface {
uint256 public totalSupply;
function balanceOf(address _owner) public constant returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract KOKContract is ERC20Interface, Owned {
string public constant symbol = "KOK";
string public constant name = "KOK Coin";
uint8 public constant decimals = 18;
uint256 public constant totalSupply = 5000000000000000000000000000;
bool public stopped;
mapping (address => int8) public blackList;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
event Blacklisted(address indexed target);
event DeleteFromBlacklist(address indexed target);
event RejectedPaymentToBlacklistedAddr(address indexed from, address indexed to, uint256 value);
event RejectedPaymentFromBlacklistedAddr(address indexed from, address indexed to, uint256 value);
modifier notStopped {
require(!stopped);
_;
}
// constructor
function KOKContract() public {
balances[msg.sender] = totalSupply;
}
// function made for airdrop
function airdrop(address[] _to, uint256[] _value) onlyOwner notStopped public {
for(uint256 i = 0; i < _to.length; i++){
if(balances[_to[i]] > 0){
continue;
}
transfer(_to[i], _value[i]);
}
}
// blacklist management
function blacklisting(address _addr) onlyOwner public {
blackList[_addr] = 1;
emit Blacklisted(_addr);
}
function deleteFromBlacklist(address _addr) onlyOwner public {
blackList[_addr] = -1;
emit DeleteFromBlacklist(_addr);
}
// stop the contract
function stop() onlyOwner {
stopped = true;
}
function start() onlyOwner {
stopped = false;
}
// ERC20 functions
function balanceOf(address _owner) public constant returns (uint256 balance){
return balances[_owner];
}
function transfer(address _to, uint256 _value) notStopped public returns (bool success){
require(balances[msg.sender] >= _value);
if(blackList[msg.sender] > 0){
emit RejectedPaymentFromBlacklistedAddr(msg.sender, _to, _value);
return false;
}
if(blackList[_to] > 0){
emit RejectedPaymentToBlacklistedAddr(msg.sender, _to, _value);
return false;
}
balances[msg.sender] -= _value;
balances[_to] += _value;
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) notStopped public returns (bool success){
require(balances[_from] >= _value
&& allowed[_from][msg.sender] >= _value);
if(blackList[_from] > 0){
emit RejectedPaymentFromBlacklistedAddr(_from, _to, _value);
return false;
}
if(blackList[_to] > 0){
emit RejectedPaymentToBlacklistedAddr(_from, _to, _value);
return false;
}
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
balances[_to] += _value;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) notStopped public returns (bool success){
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining){
return allowed[_owner][_spender];
}
}KOKContract ABI
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[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"stop","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balances","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"blackList","outputs":[{"name":"","type":"int8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowed","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address[]"},{"name":"_value","type":"uint256[]"}],"name":"airdrop","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"stopped","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_addr","type":"address"}],"name":"blacklisting","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_addr","type":"address"}],"name":"deleteFromBlacklist","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"start","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_new","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"target","type":"address"}],"name":"Blacklisted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"target","type":"address"}],"name":"DeleteFromBlacklist","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"RejectedPaymentToBlacklistedAddr","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"RejectedPaymentFromBlacklistedAddr","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"oldaddr","type":"address"},{"indexed":false,"name":"newaddr","type":"address"}],"name":"TransferOwnership","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"}]KOKContract Bytecode
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