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Contract Overview | KinToken
ETH Balance: 0 Ether
ETH USD Value: $0
No Of Transactions: 28024 txns
Token Tracker Kin
  Latest 25 txns from a total Of 28024 transactions View All

TxHash Age From To Value [TxFee]
0x832175bfbba7750fa380f22465e645e9667577fc2bd63d666fdf4f31f814d37b 24 secs ago0xd3b80cc08e2de7c99f5ed8d7c2e6b1700f19a537  IN   KinToken0 Ether0.00115955
0x0ab1d0218dfaf1032e8484f5013c5ae6ff334fc1c3e9581a48b7540b9a86b7bd3 mins ago0x20f629dde065254efc0729c06c65fd67170bf7bc  IN   KinToken0 Ether0.000779772
0xb295c16a6fee521483c4bd351a80006678c8f9751b229a35d78456d4ae6d472615 mins ago0xe716b5295f8bb70582e3895c698620b5729cc178  IN   KinToken0 Ether0.00139146
0x9497a86f14480fb69ab708af9a43237598493dbff16db5a0a8795772ea589e5317 mins ago0x9d810ea010d53d921c34686d681a53ddffa1dfc1  IN   KinToken0 Ether0.000371568
0x71a3cce66d3ae09317531ecdaf7a9e580bb2480a18e1ce8cbf2fe0bc18294b6d27 mins ago0xb345ca3053aa39bff581c5dddcc18bbf520fe3ae  IN   KinToken0 Ether0.0000052068
0x1b379b1447911dbbc4130cc3ea8ee0d847db395919691cbc594ace7eb73ac55127 mins ago0x2c6c98071672523463d39f040c70cde92572dfd0  IN   KinToken0 Ether0.000186296
0x017a608ca5b77730af9b23c8d5526afab23b2da7edb18aa1e9b67451327bc9ca28 mins ago0x5ae88e962ccb51f135ffd54985392fd0a4270da1  IN   KinToken0 Ether0.000185528
0xe122cc67c8acda3f949221ba15fab0246a3eb03c1b3848856c3395f2acf2d34c32 mins ago0x69e47e228f3bb957711a01250802930889fe4a12  IN   KinToken0 Ether0.00055812
0x7707225c707485269316193f3912067d18fc8f296a1a7c226a58e2244fee924034 mins ago0x9df67880ac60aad08065a5c605e6458d05c94c31  IN   KinToken0 Ether0.000778428
0xcdda53ab192a0be5581bfa713ad37b2ca225eddd9f008f9fb32a8d9eb116168659 mins ago0xb9b00f3192cb42d7099bc5c185b19916d6e5d3da  IN   KinToken0 Ether0.000185784
0xecda2f509a19426c332ebe577f702482927e4556a16fa0d7210a17915cc6cf1b1 hr 31 mins ago0x7b387c7cb552bc5e83022b347cf59e4c18feb876  IN   KinToken0 Ether0.000371568
0x29c1c33d0aa54518210e0b61ad22a9a577c3fcd3cf0f82d92fb695bcced5e1af1 hr 34 mins ago0x5728bc8028f9b7b1143236fc2bfdf9100814e90a  IN   KinToken0 Ether0.000779772
0xc8cea020371b949217f525e6b9285b7c0855367dca68fb7636e9daaa7fccab5d1 hr 35 mins ago0x3531addf2ce7877d54aa4ba0748ab261c3e5149a  IN   KinToken0 Ether0.000826941546
0x2363ea2c8a48b33b663859536c6945edea2ec5742fdccdcb67cae992899b1ad21 hr 36 mins ago0xec4f550b24b6c0bc1ce225dd3668ddd9a0d00303  IN   KinToken0 Ether0.000781116
0x4679708b5fbc99470880a40a3c3d8628ede224c61879e444284f40c9a53fbbaf2 hrs 3 mins ago0x856be9ef79876ac28e65604bf28ec668e89d611f  IN   KinToken0 Ether0.001092084
0x7d586619a72d61d9ea42d41e27af8f8bcd0a1d68c254af301500c0a20cde91952 hrs 6 mins ago0x9df67880ac60aad08065a5c605e6458d05c94c31  IN   KinToken0 Ether0.000777084
0xeb3926b5209123eab77d96a98df749cd5abd2df50e8db80264ea4713ca81d0fe2 hrs 7 mins ago0x0d6b5a54f940bf3d52e438cab785981aaefdf40c  IN   KinToken0 Ether0.00057974
0x0a1243983a8e36aee28060b6410b173e72daee62a4d92204eea0821e503214352 hrs 16 mins ago0x856be9ef79876ac28e65604bf28ec668e89d611f  IN   KinToken0 Ether0.000487032
0x75671d6a19b60b4107fbe3d28a876a32b794ed23817f23d189d115c2bd4c86cf2 hrs 30 mins ago0x17b2d6c040e07c5cb1a62ef77d6c5b7c46aa63f0  IN   KinToken0 Ether0.000185784
0x4dc02a6fd3c990da2259880a3f775ae3af1c2856130feed27080a10e75ce61282 hrs 31 mins ago0x9c0ad7c25a2e313b4d62f71478728659384a90b2  IN   KinToken0 Ether0.000074392
0xa9d7c7430a56355d7d9445ebdbd8ba01662c3b0e51996ce5fa8130fe46c82e722 hrs 38 mins ago0x4c5720f2b605da535e0e7efb6a315a9eebea5171  IN   KinToken0 Ether0.000185784
0x9cb5dfdbed54a3e96edb1cc469c3c68fe975bb5dcb3c505e41641cc5bd4b33d72 hrs 43 mins ago0x86d905bf78e4aa978fd21b9bdc0fb9ad3458ed16  IN   KinToken0 Ether0.001094772
0xbfb840beb7df8b91791717c8437c2692122c76ca294e9bcb8c2af0553c965cb82 hrs 43 mins ago0x9c0ad7c25a2e313b4d62f71478728659384a90b2  IN   KinToken0 Ether0.000104008
0x4b41923b8590dad01c827ed2d1f9b9396d409d1d80013cc5251847e220c5c7622 hrs 54 mins ago0xe5766a0fd8f5bd9e823c0c4861dfd5d25c1d97b9  IN   KinToken0 Ether0.00093404
0x300bc794d73662222c411efcaa5eee27146d456f402799cdb6f105286ce3ed602 hrs 58 mins ago0x7ce575cbe83c791fa5d43657ad83909cb45a81fa  IN   KinToken0 Ether0.000464772
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 Internal Transactions as a result of Contract Execution
  Latest 1 Internal Transaction

ParentTxHash Block Age From To Value
0x76ee7eabf92f4c276ffeae083d40ffb68522d035ad73153aaefcc5a8bc68e33a426139370 days 7 hrs ago0x8bfe5ebb128ee82f4ba80f56bb32409cc87bc6fb  Contract Creation0 Ether
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Warning: The compiled contract might be susceptible to ZeroFunctionSelector (very low-severity) Solidity compiler bugs.

Contract Source Code Verified
Contract Name: KinToken
Compiler Version: v0.4.15+commit.bbb8e64f
Optimization Enabled: Yes
Runs (Optimiser):  200

  Contract Source Code   Find Similiar Contracts
pragma solidity ^0.4.15;

/// @title Ownable
/// @dev The Ownable contract has an owner address, and provides basic authorization control functions, this simplifies
/// and the implementation of "user permissions".
contract Ownable {
    address public owner;
    address public newOwnerCandidate;

    event OwnershipRequested(address indexed _by, address indexed _to);
    event OwnershipTransferred(address indexed _from, address indexed _to);

    /// @dev The Ownable constructor sets the original `owner` of the contract to the sender
    /// account.
    function Ownable() {
        owner = msg.sender;

    /// @dev Reverts if called by any account other than the owner.
    modifier onlyOwner() {
        if (msg.sender != owner) {


    modifier onlyOwnerCandidate() {
        if (msg.sender != newOwnerCandidate) {


    /// @dev Proposes to transfer control of the contract to a newOwnerCandidate.
    /// @param _newOwnerCandidate address The address to transfer ownership to.
    function requestOwnershipTransfer(address _newOwnerCandidate) external onlyOwner {
        require(_newOwnerCandidate != address(0));

        newOwnerCandidate = _newOwnerCandidate;

        OwnershipRequested(msg.sender, newOwnerCandidate);

    /// @dev Accept ownership transfer. This method needs to be called by the previously proposed owner.
    function acceptOwnership() external onlyOwnerCandidate {
        address previousOwner = owner;

        owner = newOwnerCandidate;
        newOwnerCandidate = address(0);

        OwnershipTransferred(previousOwner, owner);

/// @title Math operations with safety checks
library SafeMath {
    function mul(uint256 a, uint256 b) internal returns (uint256) {
        uint256 c = a * b;
        assert(a == 0 || c / a == b);
        return c;

    function div(uint256 a, uint256 b) internal 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 c;

    function sub(uint256 a, uint256 b) internal returns (uint256) {
        assert(b <= a);
        return a - b;

    function add(uint256 a, uint256 b) internal returns (uint256) {
        uint256 c = a + b;
        assert(c >= a);
        return c;

    function max64(uint64 a, uint64 b) internal constant returns (uint64) {
        return a >= b ? a : b;

    function min64(uint64 a, uint64 b) internal constant returns (uint64) {
        return a < b ? a : b;

    function max256(uint256 a, uint256 b) internal constant returns (uint256) {
        return a >= b ? a : b;

    function min256(uint256 a, uint256 b) internal constant returns (uint256) {
        return a < b ? a : b;

/// @title ERC Token Standard #20 Interface (https://github.com/ethereum/EIPs/issues/20)
contract ERC20 {
    uint256 public totalSupply;
    function balanceOf(address _owner) constant returns (uint256 balance);
    function transfer(address _to, uint256 _value) returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
    function approve(address _spender, uint256 _value) returns (bool success);
    function allowance(address _owner, address _spender) constant returns (uint256 remaining);
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

/// @title Basic ERC20 token contract implementation.
/// @dev Based on OpenZeppelin's StandardToken.
contract BasicToken is ERC20 {
    using SafeMath for uint256;

    uint256 public totalSupply;
    mapping (address => mapping (address => uint256)) allowed;
    mapping (address => uint256) balances;

    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Transfer(address indexed from, address indexed to, uint256 value);

    /// @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
    /// @param _spender address The address which will spend the funds.
    /// @param _value uint256 The amount of tokens to be spent.
    function approve(address _spender, uint256 _value) public returns (bool) {
        // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
        if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) {

        allowed[msg.sender][_spender] = _value;

        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 uint256 specifying the amount of tokens still available for the spender.
    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
        return allowed[_owner][_spender];

    /// @dev Gets the balance of the specified address.
    /// @param _owner address The address to query the the balance of.
    /// @return uint256 representing the amount owned by the passed address.
    function balanceOf(address _owner) constant returns (uint256 balance) {
        return balances[_owner];

    /// @dev transfer token to a specified address.
    /// @param _to address The address to transfer to.
    /// @param _value uint256 The amount to be transferred.
    function transfer(address _to, uint256 _value) public returns (bool) {
        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(_value);

        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) {
        uint256 _allowance = allowed[_from][msg.sender];

        balances[_from] = balances[_from].sub(_value);
        balances[_to] = balances[_to].add(_value);

        allowed[_from][msg.sender] = _allowance.sub(_value);

        Transfer(_from, _to, _value);

        return true;

/// @title Token holder contract.
contract TokenHolder is Ownable {
    /// @dev Allow the owner to transfer out any accidentally sent ERC20 tokens.
    /// @param _tokenAddress address The address of the ERC20 contract.
    /// @param _amount uint256 The amount of tokens to be transferred.
    function transferAnyERC20Token(address _tokenAddress, uint256 _amount) onlyOwner returns (bool success) {
        return ERC20(_tokenAddress).transfer(owner, _amount);

/// @title Kin token contract.
contract KinToken is Ownable, BasicToken, TokenHolder {
    using SafeMath for uint256;

    string public constant name = "Kin";
    string public constant symbol = "KIN";

    // Using same decimal value as ETH (makes ETH-KIN conversion much easier).
    uint8 public constant decimals = 18;

    // States whether creating more tokens is allowed or not.
    // Used during token sale.
    bool public isMinting = true;

    event MintingEnded();

    modifier onlyDuringMinting() {


    modifier onlyAfterMinting() {


    /// @dev Mint Kin tokens.
    /// @param _to address Address to send minted Kin to.
    /// @param _amount uint256 Amount of Kin tokens to mint.
    function mint(address _to, uint256 _amount) external onlyOwner onlyDuringMinting {
        totalSupply = totalSupply.add(_amount);
        balances[_to] = balances[_to].add(_amount);

        Transfer(0x0, _to, _amount);

    /// @dev End minting mode.
    function endMinting() external onlyOwner {
        if (isMinting == false) {

        isMinting = false;


    /// @dev Same ERC20 behavior, but reverts if still minting.
    /// @param _spender address The address which will spend the funds.
    /// @param _value uint256 The amount of tokens to be spent.
    function approve(address _spender, uint256 _value) public onlyAfterMinting returns (bool) {
        return super.approve(_spender, _value);

    /// @dev Same ERC20 behavior, but reverts if still minting.
    /// @param _to address The address to transfer to.
    /// @param _value uint256 The amount to be transferred.
    function transfer(address _to, uint256 _value) public onlyAfterMinting returns (bool) {
        return super.transfer(_to, _value);

    /// @dev Same ERC20 behavior, but reverts if still minting.
    /// @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 onlyAfterMinting returns (bool) {
        return super.transferFrom(_from, _to, _value);

/// @title Vesting trustee contract for Kin token.
contract VestingTrustee is Ownable {
    using SafeMath for uint256;

    // Kin token contract.
    KinToken public kin;

    // Vesting grant for a speicifc holder.
    struct Grant {
        uint256 value;
        uint256 start;
        uint256 cliff;
        uint256 end;
        uint256 installmentLength; // In seconds.
        uint256 transferred;
        bool revokable;

    // Holder to grant information mapping.
    mapping (address => Grant) public grants;

    // Total tokens available for vesting.
    uint256 public totalVesting;

    event NewGrant(address indexed _from, address indexed _to, uint256 _value);
    event TokensUnlocked(address indexed _to, uint256 _value);
    event GrantRevoked(address indexed _holder, uint256 _refund);

    /// @dev Constructor that initializes the address of the Kin token contract.
    /// @param _kin KinToken The address of the previously deployed Kin token contract.
    function VestingTrustee(KinToken _kin) {
        require(_kin != address(0));

        kin = _kin;

    /// @dev Grant tokens to a specified address. Please note, that the trustee must have enough ungranted tokens to
    /// accomodate the new grant. Otherwise, the call with fail.
    /// @param _to address The holder address.
    /// @param _value uint256 The amount of tokens to be granted.
    /// @param _start uint256 The beginning of the vesting period.
    /// @param _cliff uint256 Duration of the cliff period (when the first installment is made).
    /// @param _end uint256 The end of the vesting period.
    /// @param _installmentLength uint256 The length of each vesting installment (in seconds).
    /// @param _revokable bool Whether the grant is revokable or not.
    function grant(address _to, uint256 _value, uint256 _start, uint256 _cliff, uint256 _end,
        uint256 _installmentLength, bool _revokable)
        external onlyOwner {

        require(_to != address(0));
        require(_to != address(this)); // Protect this contract from receiving a grant.
        require(_value > 0);

        // Require that every holder can be granted tokens only once.
        require(grants[_to].value == 0);

        // Require for time ranges to be consistent and valid.
        require(_start <= _cliff && _cliff <= _end);

        // Require installment length to be valid and no longer than (end - start).
        require(_installmentLength > 0 && _installmentLength <= _end.sub(_start));

        // Grant must not exceed the total amount of tokens currently available for vesting.
        require(totalVesting.add(_value) <= kin.balanceOf(address(this)));

        // Assign a new grant.
        grants[_to] = Grant({
            value: _value,
            start: _start,
            cliff: _cliff,
            end: _end,
            installmentLength: _installmentLength,
            transferred: 0,
            revokable: _revokable

        // Since tokens have been granted, reduce the total amount available for vesting.
        totalVesting = totalVesting.add(_value);

        NewGrant(msg.sender, _to, _value);

    /// @dev Revoke the grant of tokens of a specifed address.
    /// @param _holder The address which will have its tokens revoked.
    function revoke(address _holder) public onlyOwner {
        Grant memory grant = grants[_holder];

        // Grant must be revokable.

        // Calculate amount of remaining tokens that can still be returned.
        uint256 refund = grant.value.sub(grant.transferred);

        // Remove the grant.
        delete grants[_holder];

        // Update total vesting amount and transfer previously calculated tokens to owner.
        totalVesting = totalVesting.sub(refund);
        kin.transfer(msg.sender, refund);

        GrantRevoked(_holder, refund);

    /// @dev Calculate the total amount of vested tokens of a holder at a given time.
    /// @param _holder address The address of the holder.
    /// @param _time uint256 The specific time to calculate against.
    /// @return a uint256 Representing a holder's total amount of vested tokens.
    function vestedTokens(address _holder, uint256 _time) external constant returns (uint256) {
        Grant memory grant = grants[_holder];
        if (grant.value == 0) {
            return 0;

        return calculateVestedTokens(grant, _time);

    /// @dev Calculate amount of vested tokens at a specifc time.
    /// @param _grant Grant The vesting grant.
    /// @param _time uint256 The time to be checked
    /// @return An uint256 Representing the amount of vested tokens of a specific grant.
    function calculateVestedTokens(Grant _grant, uint256 _time) private constant returns (uint256) {
        // If we're before the cliff, then nothing is vested.
        if (_time < _grant.cliff) {
            return 0;

        // If we're after the end of the vesting period - everything is vested;
        if (_time >= _grant.end) {
            return _grant.value;

        // Calculate amount of installments past until now.
        // NOTE result gets floored because of integer division.
        uint256 installmentsPast = _time.sub(_grant.start).div(_grant.installmentLength);

        // Calculate amount of days in entire vesting period.
        uint256 vestingDays = _grant.end.sub(_grant.start);

        // Calculate and return the number of tokens according to vesting days that have passed.
        return _grant.value.mul(installmentsPast.mul(_grant.installmentLength)).div(vestingDays);

    /// @dev Unlock vested tokens and transfer them to the grantee.
    function unlockVestedTokens() external {
        Grant storage grant = grants[msg.sender];

        // Make sure the grant has tokens available.
        require(grant.value != 0);

        // Get the total amount of vested tokens, acccording to grant.
        uint256 vested = calculateVestedTokens(grant, now);
        if (vested == 0) {

        // Make sure the holder doesn't transfer more than what he already has.
        uint256 transferable = vested.sub(grant.transferred);
        if (transferable == 0) {

        // Update transferred and total vesting amount, then transfer remaining vested funds to holder.
        grant.transferred = grant.transferred.add(transferable);
        totalVesting = totalVesting.sub(transferable);
        kin.transfer(msg.sender, transferable);

        TokensUnlocked(msg.sender, transferable);

/// @title Kin token sale contract.
contract KinTokenSale is Ownable, TokenHolder {
    using SafeMath for uint256;

    // External parties:

    // KIN token contract.
    KinToken public kin;

    // Vesting contract for pre-sale participants.
    VestingTrustee public trustee;

    // Received funds are forwarded to this address.
    address public fundingRecipient;

    // Kin token unit.
    // Using same decimal value as ETH (makes ETH-KIN conversion much easier).
    // This is the same as in Kin token contract.
    uint256 public constant TOKEN_UNIT = 10 ** 18;

    // Maximum number of tokens in circulation: 10 trillion.
    uint256 public constant MAX_TOKENS = 10 ** 13 * TOKEN_UNIT;

    // Maximum tokens offered in the sale.
    uint256 public constant MAX_TOKENS_SOLD = 512195121951 * TOKEN_UNIT;

    // Wei to 1 USD ratio.
    uint256 public constant WEI_PER_USD = uint256(1 ether) / 289;

    // KIN to 1 USD ratio,
    // such that MAX_TOKENS_SOLD / KIN_PER_USD is the $75M cap.
    uint256 public constant KIN_PER_USD = 6829 * TOKEN_UNIT;

    // KIN to 1 wei ratio.
    uint256 public constant KIN_PER_WEI = KIN_PER_USD / WEI_PER_USD;

    // Sale start and end timestamps.
    uint256 public constant SALE_DURATION = 14 days;
    uint256 public startTime;
    uint256 public endTime;

    // Amount of tokens sold until now in the sale.
    uint256 public tokensSold = 0;

    // Participation caps, according to KYC tiers.
    uint256 public constant TIER_1_CAP = 100000 * WEI_PER_USD;
    uint256 public constant TIER_2_CAP = uint256(-1); // Maximum uint256 value

    // Accumulated amount each participant has contributed so far.
    mapping (address => uint256) public participationHistory;

    // Maximum amount that each participant is allowed to contribute (in WEI).
    mapping (address => uint256) public participationCaps;

    // Maximum amount ANYBODY is currently allowed to contribute.
    uint256 public hardParticipationCap = 4393 * WEI_PER_USD;

    // Vesting information for special addresses:
    struct TokenGrant {
        uint256 value;
        uint256 startOffset;
        uint256 cliffOffset;
        uint256 endOffset;
        uint256 installmentLength;
        uint8 percentVested;

    address[] public tokenGrantees;
    mapping (address => TokenGrant) public tokenGrants;
    uint256 public lastGrantedIndex = 0;
    uint256 public constant MAX_TOKEN_GRANTEES = 100;
    uint256 public constant GRANT_BATCH_SIZE = 10;

    // Post-TDE multisig addresses.
    address public constant KIN_FOUNDATION_ADDRESS = 0x56aE76573EC54754bC5B6A8cBF04bBd7Dc86b0A0;
    address public constant KIK_ADDRESS = 0x3bf4BbE253153678E9E8E540395C22BFf7fCa87d;

    event TokensIssued(address indexed _to, uint256 _tokens);

    /// @dev Reverts if called when not during sale.
    modifier onlyDuringSale() {
        require(!saleEnded() && now >= startTime);


    /// @dev Reverts if called before sale ends.
    modifier onlyAfterSale() {


    /// @dev Constructor that initializes the sale conditions.
    /// @param _fundingRecipient address The address of the funding recipient.
    /// @param _startTime uint256 The start time of the token sale.
    function KinTokenSale(address _fundingRecipient, uint256 _startTime) {
        require(_fundingRecipient != address(0));
        require(_startTime > now);

        // Deploy new KinToken contract.
        kin = new KinToken();

        // Deploy new VestingTrustee contract.
        trustee = new VestingTrustee(kin);

        fundingRecipient = _fundingRecipient;
        startTime = _startTime;
        endTime = startTime + SALE_DURATION;

        // Initialize special vesting grants.

    /// @dev Initialize token grants.
    function initTokenGrants() private onlyOwner {
        // Issue the remaining 60% to Kin Foundation's multisig wallet. In a few days, after the token sale is
        // finalized, these tokens will be loaded into the KinVestingTrustee smart contract, according to the white
        // paper. Please note, that this is implied by setting a 0% vesting percent.
        tokenGrants[KIN_FOUNDATION_ADDRESS] = TokenGrant(MAX_TOKENS.mul(60).div(100), 0, 0, 3 years, 1 days, 0);

        // Kik, 30%
        tokenGrants[KIK_ADDRESS] = TokenGrant(MAX_TOKENS.mul(30).div(100), 0, 0, 120 weeks, 12 weeks, 100);

    /// @dev Adds a Kin token vesting grant.
    /// @param _grantee address The address of the token grantee. Can be granted only once.
    /// @param _value uint256 The value of the grant.
    function addTokenGrant(address _grantee, uint256 _value) external onlyOwner {
        require(_grantee != address(0));
        require(_value > 0);
        require(tokenGrantees.length + 1 <= MAX_TOKEN_GRANTEES);

        // Verify the grant doesn't already exist.
        require(tokenGrants[_grantee].value == 0);
        for (uint i = 0; i < tokenGrantees.length; i++) {
            require(tokenGrantees[i] != _grantee);

        // Add grant and add to grantee list.
        tokenGrants[_grantee] = TokenGrant(_value, 0, 1 years, 1 years, 1 days, 50);

    /// @dev Deletes a Kin token grant.
    /// @param _grantee address The address of the token grantee.
    function deleteTokenGrant(address _grantee) external onlyOwner {
        require(_grantee != address(0));

        // Delete the grant from the keys array.
        for (uint i = 0; i < tokenGrantees.length; i++) {
            if (tokenGrantees[i] == _grantee) {
                delete tokenGrantees[i];


        // Delete the grant from the mapping.
        delete tokenGrants[_grantee];

    /// @dev Add a list of participants to a capped participation tier.
    /// @param _participants address[] The list of participant addresses.
    /// @param _cap uint256 The cap amount (in ETH).
    function setParticipationCap(address[] _participants, uint256 _cap) private onlyOwner {
        for (uint i = 0; i < _participants.length; i++) {
            participationCaps[_participants[i]] = _cap;

    /// @dev Add a list of participants to cap tier #1.
    /// @param _participants address[] The list of participant addresses.
    function setTier1Participants(address[] _participants) external onlyOwner {
        setParticipationCap(_participants, TIER_1_CAP);

    /// @dev Add a list of participants to tier #2.
    /// @param _participants address[] The list of participant addresses.
    function setTier2Participants(address[] _participants) external onlyOwner {
        setParticipationCap(_participants, TIER_2_CAP);

    /// @dev Set hard participation cap for all participants.
    /// @param _cap uint256 The hard cap amount.
    function setHardParticipationCap(uint256 _cap) external onlyOwner {
        require(_cap > 0);

        hardParticipationCap = _cap;

    /// @dev Fallback function that will delegate the request to create().
    function () external payable onlyDuringSale {

    /// @dev Create and sell tokens to the caller.
    /// @param _recipient address The address of the recipient receiving the tokens.
    function create(address _recipient) public payable onlyDuringSale {
        require(_recipient != address(0));

        // Enforce participation cap (in Wei received).
        uint256 weiAlreadyParticipated = participationHistory[msg.sender];
        uint256 participationCap = SafeMath.min256(participationCaps[msg.sender], hardParticipationCap);
        uint256 cappedWeiReceived = SafeMath.min256(msg.value, participationCap.sub(weiAlreadyParticipated));
        require(cappedWeiReceived > 0);

        // Accept funds and transfer to funding recipient.
        uint256 weiLeftInSale = MAX_TOKENS_SOLD.sub(tokensSold).div(KIN_PER_WEI);
        uint256 weiToParticipate = SafeMath.min256(cappedWeiReceived, weiLeftInSale);
        participationHistory[msg.sender] = weiAlreadyParticipated.add(weiToParticipate);

        // Issue tokens and transfer to recipient.
        uint256 tokensLeftInSale = MAX_TOKENS_SOLD.sub(tokensSold);
        uint256 tokensToIssue = weiToParticipate.mul(KIN_PER_WEI);
        if (tokensLeftInSale.sub(tokensToIssue) < KIN_PER_WEI) {
            // If purchase would cause less than KIN_PER_WEI tokens left then nobody could ever buy them.
            // So, gift them to the last buyer.
            tokensToIssue = tokensLeftInSale;
        tokensSold = tokensSold.add(tokensToIssue);
        issueTokens(_recipient, tokensToIssue);

        // Partial refund if full participation not possible
        // e.g. due to cap being reached.
        uint256 refund = msg.value.sub(weiToParticipate);
        if (refund > 0) {

    /// @dev Finalizes the token sale event, by stopping token minting.
    function finalize() external onlyAfterSale onlyOwner {
        if (!kin.isMinting()) {

        require(lastGrantedIndex == tokenGrantees.length);

        // Finish minting.

    /// @dev Grants pre-configured token grants in batches. When the method is called, it'll resume from the last grant,
    /// from its previous run, and will finish either after granting GRANT_BATCH_SIZE grants or finishing the whole list
    /// of grants.
    function grantTokens() external onlyAfterSale onlyOwner {
        uint endIndex = SafeMath.min256(tokenGrantees.length, lastGrantedIndex + GRANT_BATCH_SIZE);
        for (uint i = lastGrantedIndex; i < endIndex; i++) {
            address grantee = tokenGrantees[i];

            // Calculate how many tokens have been granted, vested, and issued such that: granted = vested + issued.
            TokenGrant memory tokenGrant = tokenGrants[grantee];
            uint256 tokensGranted = tokenGrant.value.mul(tokensSold).div(MAX_TOKENS_SOLD);
            uint256 tokensVesting = tokensGranted.mul(tokenGrant.percentVested).div(100);
            uint256 tokensIssued = tokensGranted.sub(tokensVesting);

            // Transfer issued tokens that have yet to be transferred to grantee.
            if (tokensIssued > 0) {
                issueTokens(grantee, tokensIssued);

            // Transfer vested tokens that have yet to be transferred to vesting trustee, and initialize grant.
            if (tokensVesting > 0) {
                issueTokens(trustee, tokensVesting);
                trustee.grant(grantee, tokensVesting, now.add(tokenGrant.startOffset), now.add(tokenGrant.cliffOffset),
                    now.add(tokenGrant.endOffset), tokenGrant.installmentLength, true);


    /// @dev Issues tokens for the recipient.
    /// @param _recipient address The address of the recipient.
    /// @param _tokens uint256 The amount of tokens to issue.
    function issueTokens(address _recipient, uint256 _tokens) private {
        // Request Kin token contract to mint the requested tokens for the buyer.
        kin.mint(_recipient, _tokens);

        TokensIssued(_recipient, _tokens);

    /// @dev Returns whether the sale has ended.
    /// @return bool Whether the sale has ended or not.
    function saleEnded() private constant returns (bool) {
        return tokensSold >= MAX_TOKENS_SOLD || now >= endTime;

    /// @dev Requests to transfer control of the Kin token contract to a new owner.
    /// @param _newOwnerCandidate address The address to transfer ownership to.
    /// NOTE:
    ///   1. The new owner will need to call Kin token contract's acceptOwnership directly in order to accept the ownership.
    ///   2. Calling this method during the token sale will prevent the token sale to continue, since only the owner of
    ///      the Kin token contract can issue new tokens.
    function requestKinTokenOwnershipTransfer(address _newOwnerCandidate) external onlyOwner {

    /// @dev Accepts new ownership on behalf of the Kin token contract.
    // This can be used by the sale contract itself to claim back ownership of the Kin token contract.
    function acceptKinTokenOwnership() external onlyOwner {

    /// @dev Requests to transfer control of the VestingTrustee contract to a new owner.
    /// @param _newOwnerCandidate address The address to transfer ownership to.
    /// NOTE:
    ///   1. The new owner will need to call VestingTrustee's acceptOwnership directly in order to accept the ownership.
    ///   2. Calling this method during the token sale will prevent the token sale from finalizaing, since only the owner
    ///      of the VestingTrustee contract can issue new token grants.
    function requestVestingTrusteeOwnershipTransfer(address _newOwnerCandidate) external onlyOwner {

    /// @dev Accepts new ownership on behalf of the VestingTrustee contract.
    /// This can be used by the token sale contract itself to claim back ownership of the VestingTrustee contract.
    function acceptVestingTrusteeOwnership() external onlyOwner {

    Contract ABI  

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