ICO Bench
ICObazaar
ICOmarks
Trackico
Top ICO List

blog-thumb
  • 18 Feb, 2019
Faireum in the top ICO listing sites.

Faireum is proud to announce that we have been featured on 5 of the top ICO listing sites

blog-thumb
  • 13 Feb, 2019
Faireum CEO Exclusive Interview.

Faireum CEO Exclusive Interview with Coin Otaku | 2019 Japan Blockchain Conference

blog-thumb
  • 24 Jan, 2019
Faireum has passed the SmartDec's audit.

The Faireum's smart contract has passed the audit from the SmartDec on 24 Jan, 2019.

graph

graph

icon

icon

icon

icon

icon

icon

graph

icon

icon

icon

icon

mockup

30% ~ 40%

5% ~ 25%


chart

chart

                        
pragma solidity 0.4.25;

/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {
    /**
    * @dev Multiplies two numbers, reverts on overflow.
    */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b);

        return c;
    }

    /**
    * @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
    */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
    * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
    */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a);
        uint256 c = a - b;

        return c;
    }

    /**
    * @dev Adds two numbers, reverts on overflow.
    */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);

        return c;
    }

    /**
    * @dev Divides two numbers and returns the remainder (unsigned integer modulo),
    * reverts when dividing by zero.
    */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0);
        return a % b;
    }
}

/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
    struct Role {
        mapping (address => bool) bearer;
    }

    /**
    * @dev give an account access to this role
    */
    function add(Role storage role, address account) internal {
        require(account != address(0));
        require(!has(role, account));

        role.bearer[account] = true;
    }

    /**
    * @dev remove an account's access to this role
    */
    function remove(Role storage role, address account) internal {
        require(account != address(0));
        require(has(role, account));

        role.bearer[account] = false;
    }

    /**
    * @dev check if an account has this role
    * @return bool
    */
    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0));
        return role.bearer[account];
    }
}

contract AdminRole {
    using Roles for Roles.Role;

    event AdminAdded(address indexed account);
    event AdminRemoved(address indexed account);

    Roles.Role private _admins;

    constructor () internal {
        _addAdmin(msg.sender);
    }

    modifier onlyAdmin() {
        require(isAdmin(msg.sender));
        _;
    }

    function isAdmin(address account) public view returns (bool) {
        return _admins.has(account);
    }

    function addAdmin(address account) public onlyAdmin {
        _addAdmin(account);
    }

    function renounceAdmin() public {
        _removeAdmin(msg.sender);
    }

    function _addAdmin(address account) internal {
        _admins.add(account);
        emit AdminAdded(account);
    }

    function _removeAdmin(address account) internal {
        _admins.remove(account);
        emit AdminRemoved(account);
    }
}

/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
interface IERC20 {
    function totalSupply() external view returns (uint256);

    function balanceOf(address who) external view returns (uint256);

    function allowance(address owner, address spender) external view returns (uint256);

    function transfer(address to, uint256 value) external returns (bool);

    function approve(address spender, uint256 value) external returns (bool);

    function transferFrom(address from, address to, uint256 value) external returns (bool);

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

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
* Originally based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*
* This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for
* all accounts just by listening to said events. Note that this isn't required by the specification, and other
* compliant implementations may not do it.
*/
contract ERC20 is IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowed;

    uint256 private _totalSupply;

    /**
    * @dev Total number of tokens in existence
    */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    /**
    * @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) {
        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 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 returns (bool) {
        _transfer(msg.sender, 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 returns (bool) {
        require(spender != address(0));

        _allowed[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    /**
    * @dev Transfer tokens from one address to another.
    * Note that while this function emits an Approval event, this is not required as per the specification,
    * and other compliant implementations may not emit the event.
    * @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) {
        _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
        _transfer(from, to, value);
        emit Approval(from, msg.sender, _allowed[from][msg.sender]);
        return true;
    }

    /**
    * @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
    * Emits an Approval event.
    * @param spender The address which will spend the funds.
    * @param addedValue The amount of tokens to increase the allowance by.
    */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        require(spender != address(0));

        _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
    * Emits an Approval event.
    * @param spender The address which will spend the funds.
    * @param subtractedValue The amount of tokens to decrease the allowance by.
    */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        require(spender != address(0));

        _allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
        emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
        return true;
    }

    /**
    * @dev Transfer token for a specified addresses
    * @param from The address to transfer from.
    * @param to The address to transfer to.
    * @param value The amount to be transferred.
    */
    function _transfer(address from, address to, uint256 value) internal {
        require(to != address(0));

        _balances[from] = _balances[from].sub(value);
        _balances[to] = _balances[to].add(value);
        emit Transfer(from, to, value);
    }

    /**
    * @dev Internal function that mints an amount of the token and assigns it to
    * an account. This encapsulates the modification of balances such that the
    * proper events are emitted.
    * @param account The account that will receive the created tokens.
    * @param value The amount that will be created.
    */
    function _mint(address account, uint256 value) internal {
        require(account != address(0));

        _totalSupply = _totalSupply.add(value);
        _balances[account] = _balances[account].add(value);
        emit Transfer(address(0), account, value);
    }

    /**
    * @dev Internal function that burns an amount of the token of a given
    * account.
    * @param account The account whose tokens will be burnt.
    * @param value The amount that will be burnt.
    */
    function _burn(address account, uint256 value) internal {
        require(account != address(0));

        _totalSupply = _totalSupply.sub(value);
        _balances[account] = _balances[account].sub(value);
        emit Transfer(account, address(0), value);
    }

    /**
    * @dev Internal function that burns an amount of the token of a given
    * account, deducting from the sender's allowance for said account. Uses the
    * internal burn function.
    * Emits an Approval event (reflecting the reduced allowance).
    * @param account The account whose tokens will be burnt.
    * @param value The amount that will be burnt.
    */
    function _burnFrom(address account, uint256 value) internal {
        _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
        _burn(account, value);
        emit Approval(account, msg.sender, _allowed[account][msg.sender]);
    }
}

/**
* @title ERC20Detailed token
* @dev The decimals are only for visualization purposes.
* All the operations are done using the smallest and indivisible token unit,
* just as on Ethereum all the operations are done in wei.
*/
contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

    /**
    * @return the name of the token.
    */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
    * @return the symbol of the token.
    */
    function symbol() public view returns (string memory) {
        return _symbol;
    }

    /**
    * @return the number of decimals of the token.
    */
    function decimals() public view returns (uint8) {
        return _decimals;
    }
}

/**
* @title TokenVault
* @dev TokenVault is a token holder contract that will allow a
* beneficiary to spend the tokens from some function of a specified ERC20 token
*/
contract TokenVault {
    // ERC20 token contract being held
    IERC20 public token;

    constructor(IERC20 _token) public {
        token = _token;
    }

    /**
    * @notice increase the allowance of the token contract
    * to the full amount of tokens held in this vault
    */
    function fillUpAllowance() public {
        uint256 amount = token.balanceOf(this);
        require(amount > 0);

        token.approve(token, amount);
    }

    /**
    * @notice change the allowance for a specific spender
    */
    function approve(address _spender, uint256 _tokensAmount) public {
        require(msg.sender == address(token));

        token.approve(_spender, _tokensAmount);
    }
}

contract FaireumToken is ERC20, ERC20Detailed, AdminRole {
    using SafeMath for uint256;

    uint8 public constant DECIMALS = 18;

    /// Maximum tokens to be allocated (1.2 billion FAIRC)
    uint256 public constant INITIAL_SUPPLY = 1200000000 * 10**uint256(DECIMALS);

    /// This vault is used to keep the Faireum team, developers and advisors tokens
    TokenVault public teamAdvisorsTokensVault;

    /// This vault is used to keep the reward pool tokens
    TokenVault public rewardPoolTokensVault;

    /// This vault is used to keep the founders tokens
    TokenVault public foundersTokensVault;

    /// This vault is used to keep the tokens for marketing/partnership/airdrop
    TokenVault public marketingAirdropTokensVault;

    /// This vault is used to keep the tokens for sale
    TokenVault public saleTokensVault;

    /// The reference time point at which all token locks start
    //  Mon Mar 11 2019 00:00:00 GMT+0000   The begining of Pre ICO
    uint256 public locksStartDate = 1552262400;

    mapping(address => uint256) public lockedHalfYearBalances;
    mapping(address => uint256) public lockedFullYearBalances;

    modifier timeLock(address from, uint256 value) {
        if (lockedHalfYearBalances[from] > 0 && now >= locksStartDate + 182 days) lockedHalfYearBalances[from] = 0;
        if (now < locksStartDate + 365 days) {
            uint256 unlocks = balanceOf(from).sub(lockedHalfYearBalances[from]).sub(lockedFullYearBalances[from]);
            require(value <= unlocks);
        } else if (lockedFullYearBalances[from] > 0) lockedFullYearBalances[from] = 0;
        _;
    }

    constructor () public ERC20Detailed("Faireum Token", "FAIRC", DECIMALS) {
    }

    /// @dev function to lock reward pool tokens
    function lockRewardPoolTokens(address _beneficiary, uint256 _tokensAmount) public onlyAdmin {
        _lockTokens(address(rewardPoolTokensVault), false, _beneficiary, _tokensAmount);
    }

    /// @dev function to lock founders tokens
    function lockFoundersTokens(address _beneficiary, uint256 _tokensAmount) public onlyAdmin {
        _lockTokens(address(foundersTokensVault), false, _beneficiary, _tokensAmount);
    }

    /// @dev function to lock team/devs/advisors tokens
    function lockTeamTokens(address _beneficiary, uint256 _tokensAmount) public onlyAdmin {
        require(_tokensAmount.mod(2) == 0);
        uint256 _half = _tokensAmount.div(2);
        _lockTokens(address(teamAdvisorsTokensVault), false, _beneficiary, _half);
        _lockTokens(address(teamAdvisorsTokensVault), true, _beneficiary, _half);
    }

    /// @dev check the locked balance for an address
    function lockedBalanceOf(address _owner) public view returns (uint256) {
        return lockedFullYearBalances[_owner].add(lockedHalfYearBalances[_owner]);
    }

    /// @dev change the allowance for an ICO sale service provider
    function approveSaleSpender(address _spender, uint256 _tokensAmount) public onlyAdmin {
        saleTokensVault.approve(_spender, _tokensAmount);
    }

    /// @dev change the allowance for an ICO marketing service provider
    function approveMarketingSpender(address _spender, uint256 _tokensAmount) public onlyAdmin {
        marketingAirdropTokensVault.approve(_spender, _tokensAmount);
    }

    function transferFrom(address from, address to, uint256 value) public timeLock(from, value) returns (bool) {
        return super.transferFrom(from, to, value);
    }

    function transfer(address to, uint256 value) public timeLock(msg.sender, value) returns (bool) {
        return super.transfer(to, value);
    }

    function burn(uint256 value) public {
        _burn(msg.sender, value);
    }

    function createTokensVaults() external onlyAdmin {
        require(teamAdvisorsTokensVault == address(0));
        require(rewardPoolTokensVault == address(0));
        require(foundersTokensVault == address(0));
        require(marketingAirdropTokensVault == address(0));
        require(saleTokensVault == address(0));

        // Team, devs and advisors tokens - 120M FAIRC (10%)
        teamAdvisorsTokensVault = createTokenVault(120000000 * (10 ** uint256(DECIMALS)));
        // Reward funding pool tokens - 240M FAIRC (20%)
        rewardPoolTokensVault = createTokenVault(240000000 * (10 ** uint256(DECIMALS)));
        // Founders tokens - 60M FAIRC (5%)
        foundersTokensVault = createTokenVault(60000000 * (10 ** uint256(DECIMALS)));
        // Marketing/partnership/airdrop tokens - 120M FAIRC (10%)
        marketingAirdropTokensVault = createTokenVault(120000000 * (10 ** uint256(DECIMALS)));
        // Sale tokens - 660M FAIRC (55%)
        saleTokensVault = createTokenVault(660000000 * (10 ** uint256(DECIMALS)));

        require(totalSupply() == INITIAL_SUPPLY);
    }

    /// @dev Admin-only function to recover any tokens mistakenly sent to this contract
    function recoverERC20Tokens(address _contractAddress) external onlyAdmin  {
        IERC20 erc20Token = IERC20(_contractAddress);
        if (erc20Token.balanceOf(address(this)) > 0) {
            require(erc20Token.transfer(msg.sender, erc20Token.balanceOf(address(this))));
        }
    }

    /// @dev Create a TokenVault, fill with newly minted tokens and
    /// allow them to be spent only from the token contract
    function createTokenVault(uint256 tokens) internal returns (TokenVault) {
        TokenVault tokenVault = new TokenVault(ERC20(this));
        _mint(address(tokenVault), tokens);
        tokenVault.fillUpAllowance();
        return tokenVault;
    }

    /// @dev generic function to lock tokens from a vault
    function _lockTokens(address _fromVault, bool _halfYear, address _beneficiary, uint256 _tokensAmount) internal {
        require(_beneficiary != address(0));

        if (_halfYear) {
            lockedHalfYearBalances[_beneficiary] = lockedHalfYearBalances[_beneficiary].add(_tokensAmount);
        } else {
            lockedFullYearBalances[_beneficiary] = lockedFullYearBalances[_beneficiary].add(_tokensAmount);
        }

        require(this.transferFrom(_fromVault, _beneficiary, _tokensAmount));
    }
}
                        
                    

team
{{member.name}}
{{member.position}}

team
{{advisor.name}}
{{advisor.position}}

partner

media
media

Facebook
Twitter
Telegram
Medium
Youtube
Github
Instagram
Reddit
BitcoinTalk
Back
-- Loading --