/
vikkysmartcontract.sol
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/
vikkysmartcontract.sol
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pragma solidity ^0.4.18;
// VikkyToken
// Token name: VikkyToken
// Symbol: VIK
// Decimals: 18
// Telegram community: https://t.me/vikkyglobal
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
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;
}
}
contract ForeignToken {
function balanceOf(address _owner) constant public returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant 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);
}
interface Token {
function distr(address _to, uint256 _value) external returns (bool);
function totalSupply() constant external returns (uint256 supply);
function balanceOf(address _owner) constant external returns (uint256 balance);
}
contract VikkyToken is ERC20 {
using SafeMath for uint256;
address owner = msg.sender;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
mapping (address => bool) public airdropClaimed;
mapping (address => bool) public refundClaimed;
mapping (address => bool) public locked;
/* Keep track of Ether contributed and tokens received during Crowdsale */
mapping(address => uint) public icoEtherContributed;
mapping(address => uint) public icoTokensReceived;
string public constant name = "VikkyToken";
string public constant symbol = "VIK";
uint public constant decimals = 18;
uint constant E18 = 10**18;
uint constant E6 = 10**6;
uint public totalSupply = 1000 * E6 * E18;
uint public totalDistributed = 220 * E6 * E18; //For team + Founder
uint public totalRemaining = totalSupply.sub(totalDistributed); //For ICO
uint public tokensPerEth = 20000 * E18;
uint public tokensAirdrop = 266 * E18;
uint public tokensClaimedAirdrop = 0;
uint public totalDistributedAirdrop = 20 * E6 * E18; //Airdrop
uint public constant MIN_CONTRIBUTION = 1 ether / 100; // 0.01 Ether
uint public constant MIN_CONTRIBUTION_PRESALE = 1 ether;
uint public constant MAX_CONTRIBUTION = 100 ether;
uint public constant MIN_FUNDING_GOAL = 5000 ether; // 5000 ETH
/* ICO dates */
uint public constant DATE_PRESALE_START = 1525244400; // 05/02/2018 @ 7:00am (UTC)
uint public constant DATE_PRESALE_END = 1526454000; // 05/16/2018 @ 7:00am (UTC)
uint public constant DATE_ICO_START = 1526454060; // 05/16/2018 @ 7:01am (UTC)
uint public constant DATE_ICO_END = 1533020400; // 07/31/2018 @ 7:00am (UTC)
uint public constant BONUS_PRESALE = 30;
uint public constant BONUS_ICO_ROUND1 = 20;
uint public constant BONUS_ICO_ROUND2 = 10;
uint public constant BONUS_ICO_ROUND3 = 5;
event TokensPerEthUpdated(uint _tokensPerEth);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Refund(address indexed _owner, uint _amount, uint _tokens);
event Distr(address indexed to, uint256 amount);
event DistrFinished();
event Airdrop(address indexed _owner, uint _amount, uint _balance);
event Burn(address indexed burner, uint256 value);
event LockRemoved(address indexed _participant);
bool public distributionFinished = false;
modifier canDistr() {
require(!distributionFinished);
_;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function VikkyToken () public {
owner = msg.sender;
distr(owner, totalDistributed); //Distribute for owner
}
// Information functions ------------
/* What time is it? */
function atNow() public constant returns (uint) {
return now;
}
/* Has the minimum threshold been reached? */
function icoThresholdReached() public constant returns (bool thresholdReached) {
address myAddress = this;
uint256 etherBalance = myAddress.balance;
if (etherBalance < MIN_FUNDING_GOAL) return false;
return true;
}
function transferOwnership(address newOwner) onlyOwner public {
if (newOwner != address(0)) {
owner = newOwner;
}
}
function finishDistribution() onlyOwner canDistr public returns (bool) {
distributionFinished = true;
emit DistrFinished();
return true;
}
function distr(address _to, uint256 _amount) canDistr private returns (bool) {
totalDistributed = totalDistributed.add(_amount);
totalRemaining = totalRemaining.sub(_amount);
balances[_to] = balances[_to].add(_amount);
icoTokensReceived[msg.sender] = icoTokensReceived[msg.sender].add(_amount);
// register Ether
icoEtherContributed[msg.sender] = icoEtherContributed[msg.sender].add(msg.value);
// locked
locked[msg.sender] = true;
emit Distr(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
function distribution(address[] addresses, uint256 amount) onlyOwner canDistr public {
require(amount <= totalRemaining);
for (uint i = 0; i < addresses.length; i++) {
require(amount <= totalRemaining);
distr(addresses[i], amount);
}
if (totalDistributed >= totalSupply) {
distributionFinished = true;
}
}
function distributeAmounts(address[] addresses, uint256[] amounts) onlyOwner canDistr public {
require(addresses.length == amounts.length);
for (uint8 i = 0; i < addresses.length; i++) {
require(amounts[i] <= totalRemaining);
distr(addresses[i], amounts[i]);
if (totalDistributed >= totalSupply) {
distributionFinished = true;
}
}
}
function doAirdrop(address _participant, uint airdrop) internal {
require( airdrop > 0 );
require(tokensClaimedAirdrop < totalDistributedAirdrop);
// update balances and token issue volume
airdropClaimed[_participant] = true;
balances[_participant] = balances[_participant].add(airdrop);
totalDistributed = totalDistributed.add(airdrop);
totalRemaining = totalRemaining.sub(airdrop);
tokensClaimedAirdrop = tokensClaimedAirdrop.add(airdrop);
// log
emit Airdrop(_participant, airdrop, balances[_participant]);
emit Transfer(address(0), _participant, airdrop);
}
function adminClaimAirdrop(address _participant, uint airdrop) external {
doAirdrop(_participant, airdrop);
}
function adminClaimAirdropMultiple(address[] _addresses, uint airdrop) external {
for (uint i = 0; i < _addresses.length; i++) doAirdrop(_addresses[i], airdrop);
}
function systemClaimAirdropMultiple(address[] _addresses) external {
uint airdrop = tokensAirdrop;
for (uint i = 0; i < _addresses.length; i++) doAirdrop(_addresses[i], airdrop);
}
/* Change tokensPerEth before ICO start */
function updateTokensPerEth(uint _tokensPerEth) public onlyOwner {
require( atNow() < DATE_PRESALE_START );
tokensPerEth = _tokensPerEth;
emit TokensPerEthUpdated(_tokensPerEth);
}
function () external payable {
buyTokens();
}
function buyTokens() payable canDistr public {
uint ts = atNow();
bool isPresale = false;
bool isIco = false;
uint tokens = 0;
// minimum contribution
require( msg.value >= MIN_CONTRIBUTION );
// one address transfer hard cap
require( icoEtherContributed[msg.sender].add(msg.value) <= MAX_CONTRIBUTION );
// check dates for presale or ICO
if (ts > DATE_PRESALE_START && ts < DATE_PRESALE_END) isPresale = true;
if (ts > DATE_ICO_START && ts < DATE_ICO_END) isIco = true;
require( isPresale || isIco );
// presale cap in Ether
if (isPresale) require( msg.value >= MIN_CONTRIBUTION_PRESALE);
address investor = msg.sender;
// get baseline number of tokens
tokens = tokensPerEth.mul(msg.value) / 1 ether;
// apply bonuses (none for last week)
if (isPresale) {
tokens = tokens.mul(100 + BONUS_PRESALE) / 100;
} else if (ts < DATE_ICO_START + 14 days) {
// round 1 bonus
tokens = tokens.mul(100 + BONUS_ICO_ROUND1) / 100;
} else if (ts < DATE_ICO_START + 28 days) {
// round 2 bonus
tokens = tokens.mul(100 + BONUS_ICO_ROUND2) / 100;
} else if (ts < DATE_ICO_START + 42 days) {
// round 3 bonus
tokens = tokens.mul(100 + BONUS_ICO_ROUND3) / 100;
}
// ICO token volume cap
require( totalDistributed.add(tokens) <= totalRemaining );
if (tokens > 0) {
distr(investor, tokens);
}
if (totalDistributed >= totalSupply) {
distributionFinished = true;
}
}
function balanceOf(address _owner) constant public returns (uint256) {
return balances[_owner];
}
// mitigates the ERC20 short address attack
modifier onlyPayloadSize(uint size) {
assert(msg.data.length >= size + 4);
_;
}
// Lock functions -------------------
/* Manage locked */
function removeLock(address _participant) public {
locked[_participant] = false;
emit LockRemoved(_participant);
}
function removeLockMultiple(address[] _participants) public {
for (uint i = 0; i < _participants.length; i++) {
removeLock(_participants[i]);
}
}
function transfer(address _to, uint256 _amount) onlyPayloadSize(2 * 32) public returns (bool success) {
require(_to != address(0));
require(_amount <= balances[msg.sender]);
require( locked[msg.sender] == false );
require( locked[_to] == false );
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
function transferFrom(address _from, address _to, uint256 _amount) onlyPayloadSize(3 * 32) public returns (bool success) {
require(_to != address(0));
require(_amount <= balances[_from]);
require(_amount <= allowed[_from][msg.sender]);
require( locked[msg.sender] == false );
require( locked[_to] == false );
balances[_from] = balances[_from].sub(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
// mitigates the ERC20 spend/approval race condition
if (_value != 0 && allowed[msg.sender][_spender] != 0) { return false; }
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant public returns (uint256) {
return allowed[_owner][_spender];
}
function getTokenBalance(address tokenAddress, address who) constant public returns (uint){
ForeignToken t = ForeignToken(tokenAddress);
uint bal = t.balanceOf(who);
return bal;
}
function withdraw() onlyOwner public {
address myAddress = this;
uint256 etherBalance = myAddress.balance;
owner.transfer(etherBalance);
}
function burn(uint256 _value) onlyOwner 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);
totalDistributed = totalDistributed.sub(_value);
emit Burn(burner, _value);
}
function withdrawForeignTokens(address _tokenContract) onlyOwner public returns (bool) {
ForeignToken token = ForeignToken(_tokenContract);
uint256 amount = token.balanceOf(address(this));
return token.transfer(owner, amount);
}
// External functions ---------------
/* Reclaiming of funds by contributors in case of a failed crowdsale */
/* (it will fail if account is empty after ownerClawback) */
function reclaimFund(address _participant) public {
uint tokens; // tokens to destroy
uint amount; // refund amount
// ico is finished and was not successful
require( atNow() > DATE_ICO_END && !icoThresholdReached() );
// check if refund has already been claimed
require( !refundClaimed[_participant] );
// check if there is anything to refund
require( icoEtherContributed[_participant] > 0 );
// update variables affected by refund
tokens = icoTokensReceived[_participant];
amount = icoEtherContributed[_participant];
balances[_participant] = balances[_participant].sub(tokens);
totalDistributed = totalDistributed.sub(tokens);
refundClaimed[_participant] = true;
_participant.transfer(amount);
// log
emit Transfer(_participant, 0x0, tokens);
emit Refund(_participant, amount, tokens);
}
function reclaimFundMultiple(address[] _participants) public {
for (uint i = 0; i < _participants.length; i++) {
reclaimFund(_participants[i]);
}
}
}