Contract Source Code:
File 1 of 1 : FTT
pragma solidity ^0.4.18;
contract ERC20Basic {
uint256 public totalSupply;
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);
}
contract ERC20 is ERC20Basic {
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);
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
assert(token.transfer(to, value));
}
function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal {
assert(token.transferFrom(from, to, value));
}
function safeApprove(ERC20 token, address spender, uint256 value) internal {
assert(token.approve(spender, value));
}
}
contract Ownable {
address public owner;
modifier onlyOwner {
require(isOwner(msg.sender));
_;
}
function Ownable() public {
owner = msg.sender;
}
function transferOwnership(address _newOwner) public onlyOwner {
owner = _newOwner;
}
function isOwner(address _address) public constant returns (bool) {
return owner == _address;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 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 c;
}
/**
* @dev Substracts 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) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title TokenVesting
* @dev A token holder contract that can release its token balance gradually like a
* typical vesting scheme, with a cliff and vesting period. Optionally revocable by the
* owner.
*/
contract TokenVesting is Ownable {
using SafeMath for uint256;
using SafeERC20 for ERC20Basic;
event Released(uint256 amount);
event Revoked();
// beneficiary of tokens after they are released
address public beneficiary;
uint256 public cliff;
uint256 public start;
uint256 public duration;
bool public revocable;
mapping (address => uint256) public released;
mapping (address => bool) public revoked;
/**
* @dev Creates a vesting contract that vests its balance of any ERC20 token to the
* _beneficiary, gradually in a linear fashion until _start + _duration. By then all
* of the balance will have vested.
* @param _beneficiary address of the beneficiary to whom vested tokens are transferred
* @param _cliff duration in seconds of the cliff in which tokens will begin to vest
* @param _duration duration in seconds of the period in which the tokens will vest
* @param _revocable whether the vesting is revocable or not
*/
function TokenVesting(address _beneficiary, uint256 _start, uint256 _cliff, uint256 _duration, bool _revocable) public {
require(_beneficiary != address(0));
require(_cliff <= _duration);
beneficiary = _beneficiary;
revocable = _revocable;
duration = _duration;
cliff = _start.add(_cliff);
start = _start;
}
/**
* @notice Transfers vested tokens to beneficiary.
* @param token ERC20 token which is being vested
*/
function release(ERC20Basic token) public {
uint256 unreleased = releasableAmount(token);
require(unreleased > 0);
released[token] = released[token].add(unreleased);
token.safeTransfer(beneficiary, unreleased);
Released(unreleased);
}
/**
* @notice Allows the owner to revoke the vesting. Tokens already vested
* remain in the contract, the rest are returned to the owner.
* @param token ERC20 token which is being vested
*/
function revoke(ERC20Basic token) public onlyOwner {
require(revocable);
require(!revoked[token]);
uint256 balance = token.balanceOf(this);
uint256 unreleased = releasableAmount(token);
uint256 refund = balance.sub(unreleased);
revoked[token] = true;
token.safeTransfer(owner, refund);
Revoked();
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
* @param token ERC20 token which is being vested
*/
function releasableAmount(ERC20Basic token) public view returns (uint256) {
return vestedAmount(token).sub(released[token]);
}
/**
* @dev Calculates the amount that has already vested.
* @param token ERC20 token which is being vested
*/
function vestedAmount(ERC20Basic token) public view returns (uint256) {
uint256 currentBalance = token.balanceOf(this);
uint256 totalBalance = currentBalance.add(released[token]);
if (now < cliff) {
return 0;
} else if (now >= start.add(duration) || revoked[token]) {
return totalBalance;
} else {
return totalBalance.mul(now.sub(start)).div(duration);
}
}
}
contract FTT is Ownable {
using SafeMath for uint256;
uint256 public totalSupply = 1000000000 * 10**uint256(decimals);
string public constant name = "FarmaTrust Token";
string public symbol = "FTT";
uint8 public constant decimals = 18;
mapping(address => uint256) public balances;
mapping (address => mapping (address => uint256)) internal allowed;
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
event FTTIssued(address indexed from, address indexed to, uint256 indexed amount, uint256 timestamp);
event TdeStarted(uint256 startTime);
event TdeStopped(uint256 stopTime);
event TdeFinalized(uint256 finalizeTime);
// Amount of FTT available during tok0x2Ec9F52A5e4E7B5e20C031C1870Fd952e1F01b3Een distribution event.
uint256 public constant FT_TOKEN_SALE_CAP = 600000000 * 10**uint256(decimals);
// Amount held for operational usage.
uint256 public FT_OPERATIONAL_FUND = totalSupply - FT_TOKEN_SALE_CAP;
// Amount held for team usage.
uint256 public FT_TEAM_FUND = FT_OPERATIONAL_FUND / 10;
// Amount of FTT issued.
uint256 public fttIssued = 0;
address public tdeIssuer = 0x2Ec9F52A5e4E7B5e20C031C1870Fd952e1F01b3E;
address public teamVestingAddress;
address public unsoldVestingAddress;
address public operationalReserveAddress;
bool public tdeActive;
bool public tdeStarted;
bool public isFinalized = false;
bool public capReached;
uint256 public tdeDuration = 60 days;
uint256 public tdeStartTime;
function FTT() public {
}
modifier onlyTdeIssuer {
require(msg.sender == tdeIssuer);
_;
}
modifier tdeRunning {
require(tdeActive && block.timestamp < tdeStartTime + tdeDuration);
_;
}
modifier tdeEnded {
require(((!tdeActive && block.timestamp > tdeStartTime + tdeDuration) && tdeStarted) || capReached);
_;
}
/**
* @dev Allows contract owner to start the TDE.
*/
function startTde()
public
onlyOwner
{
require(!isFinalized);
tdeActive = true;
tdeStarted = true;
if (tdeStartTime == 0) {
tdeStartTime = block.timestamp;
}
TdeStarted(tdeStartTime);
}
/**
* @dev Allows contract owner to stop and optionally restart the TDE.
* @param _restart Resets the tdeStartTime if true.
*/
function stopTde(bool _restart)
external
onlyOwner
{
tdeActive = false;
if (_restart) {
tdeStartTime = 0;
}
TdeStopped(block.timestamp);
}
/**
* @dev Allows contract owner to increase TDE period.
* @param _time amount of time to increase TDE period by.
*/
function extendTde(uint256 _time)
external
onlyOwner
{
tdeDuration = tdeDuration.add(_time);
}
/**
* @dev Allows contract owner to reduce TDE period.
* @param _time amount of time to reduce TDE period by.
*/
function shortenTde(uint256 _time)
external
onlyOwner
{
tdeDuration = tdeDuration.sub(_time);
}
/**
* @dev Allows contract owner to set the FTT issuing authority.
* @param _tdeIssuer address of FTT issuing authority.
*/
function setTdeIssuer(address _tdeIssuer)
external
onlyOwner
{
tdeIssuer = _tdeIssuer;
}
/**
* @dev Allows contract owner to set the beneficiary of the FT operational reserve amount of FTT.
* @param _operationalReserveAddress address of FT operational reserve beneficiary.
*/
function setOperationalReserveAddress(address _operationalReserveAddress)
external
onlyOwner
tdeRunning
{
operationalReserveAddress = _operationalReserveAddress;
}
/**
* @dev Issues FTT to entitled accounts.
* @param _user address to issue FTT to.
* @param _fttAmount amount of FTT to issue.
*/
function issueFTT(address _user, uint256 _fttAmount)
public
onlyTdeIssuer
tdeRunning
returns(bool)
{
uint256 newAmountIssued = fttIssued.add(_fttAmount);
require(_user != address(0));
require(_fttAmount > 0);
require(newAmountIssued <= FT_TOKEN_SALE_CAP);
balances[_user] = balances[_user].add(_fttAmount);
fttIssued = newAmountIssued;
FTTIssued(tdeIssuer, _user, _fttAmount, block.timestamp);
if (fttIssued == FT_TOKEN_SALE_CAP) {
capReached = true;
}
return true;
}
/**
* @dev Returns amount of FTT issued.
*/
function fttIssued()
external
view
returns (uint256)
{
return fttIssued;
}
/**
* @dev Allows the contract owner to finalize the TDE.
*/
function finalize()
external
tdeEnded
onlyOwner
{
require(!isFinalized);
// Deposit team fund amount into team vesting contract.
uint256 teamVestingCliff = 15778476; // 6 months
uint256 teamVestingDuration = 1 years;
TokenVesting teamVesting = new TokenVesting(owner, now, teamVestingCliff, teamVestingDuration, true);
teamVesting.transferOwnership(owner);
teamVestingAddress = address(teamVesting);
balances[teamVestingAddress] = FT_TEAM_FUND;
if (!capReached) {
// Deposit unsold FTT into unsold vesting contract.
uint256 unsoldVestingCliff = 3 years;
uint256 unsoldVestingDuration = 10 years;
TokenVesting unsoldVesting = new TokenVesting(owner, now, unsoldVestingCliff, unsoldVestingDuration, true);
unsoldVesting.transferOwnership(owner);
unsoldVestingAddress = address(unsoldVesting);
balances[unsoldVestingAddress] = FT_TOKEN_SALE_CAP - fttIssued;
}
// Allocate operational reserve of FTT.
balances[operationalReserveAddress] = FT_OPERATIONAL_FUND - FT_TEAM_FUND;
isFinalized = true;
TdeFinalized(block.timestamp);
}
/**
* @dev Transfer tokens from one address to another. Trading limited - requires the TDE to have ended.
* @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)
{
if (!isFinalized) return false;
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Transfer token for a specified address. Trading limited - requires the TDE to have ended.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value)
public
returns (bool)
{
if (!isFinalized) return false;
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
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;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the 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];
}
/**
* approve should be called when allowed[_spender] == 0. To increment
* allowed value, it is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
*/
function increaseApproval(address _spender, uint _addedValue)
public
returns (bool success)
{
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue)
public
returns (bool success)
{
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}