pragma solidity 0.5.0;
pragma experimental ABIEncoderV2;
/**
* @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 a / b;
}
/**
* @dev Subtracts 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 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
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
uint256 private _totalSupply;
string public name;
string public symbol;
uint8 public decimals;
/**
* @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 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) {
require(value <= _balances[msg.sender]);
require(to != address(0));
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(value);
emit 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
* @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)
{
require(value <= _balances[from]);
require(value <= _allowed[from][msg.sender]);
require(to != address(0));
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(value);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
emit Transfer(from, to, value);
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
* @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
* @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 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 amount The amount that will be created.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0));
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account.
* @param account The account whose tokens will be burnt.
* @param amount The amount that will be burnt.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0));
require(amount <= _balances[account]);
_totalSupply = _totalSupply.sub(amount);
_balances[account] = _balances[account].sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @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.
* @param account The account whose tokens will be burnt.
* @param amount The amount that will be burnt.
*/
function _burnFrom(address account, uint256 amount) internal {
require(amount <= _allowed[account][msg.sender]);
// Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted,
// this function needs to emit an event with the updated approval.
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(
amount);
_burn(account, amount);
}
function burnFrom(address account, uint256 amount) public {
_burnFrom(account, amount);
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
function getOwner() public view returns (address) {
return owner;
}
function getOwnerStatic(address ownableContract) internal view returns (address) {
bytes memory callcodeOwner = abi.encodeWithSignature("getOwner()");
(bool success, bytes memory returnData) = address(ownableContract).staticcall(callcodeOwner);
require(success, "input address has to be a valid ownable contract");
return parseAddr(returnData);
}
function getTokenVestingStatic(address tokenFactoryContract) internal view returns (address) {
bytes memory callcodeTokenVesting = abi.encodeWithSignature("getTokenVesting()");
(bool success, bytes memory returnData) = address(tokenFactoryContract).staticcall(callcodeTokenVesting);
require(success, "input address has to be a valid TokenFactory contract");
return parseAddr(returnData);
}
function parseAddr(bytes memory data) public pure returns (address parsed){
assembly {parsed := mload(add(data, 32))}
}
}
/**
* @title TokenVesting contract for linearly vesting tokens to the respective vesting beneficiary
* @dev This contract receives accepted proposals from the Manager contract, and holds in lieu
* @dev all the tokens to be vested by the vesting beneficiary. It releases these tokens when called
* @dev upon in a continuous-like linear fashion.
* @notice This contract was written with reference to the TokenVesting contract from openZeppelin
* @notice @ https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/drafts/TokenVesting.sol
* @author Jake Goh Si Yuan @ jakegsy, jake@jakegsy.com
*/
contract TokenVesting is Ownable{
using SafeMath for uint256;
event Released(address indexed token, address vestingBeneficiary, uint256 amount);
event LogTokenAdded(address indexed token, address vestingBeneficiary, uint256 vestingPeriodInWeeks);
uint256 constant public WEEKS_IN_SECONDS = 1 * 7 * 24 * 60 * 60;
struct VestingInfo {
address vestingBeneficiary;
uint256 releasedSupply;
uint256 start;
uint256 duration;
}
mapping(address => VestingInfo) public vestingInfo;
/**
* @dev Method to add a token into TokenVesting
* @param _token address Address of token
* @param _vestingBeneficiary address Address of vesting beneficiary
* @param _vestingPeriodInWeeks uint256 Period of vesting, in units of Weeks, to be converted
* @notice This emits an Event LogTokenAdded which is indexed by the token address
*/
function addToken
(
address _token,
address _vestingBeneficiary,
uint256 _vestingPeriodInWeeks
)
external
onlyOwner
{
vestingInfo[_token] = VestingInfo({
vestingBeneficiary : _vestingBeneficiary,
releasedSupply : 0,
start : now,
duration : uint256(_vestingPeriodInWeeks).mul(WEEKS_IN_SECONDS)
});
emit LogTokenAdded(_token, _vestingBeneficiary, _vestingPeriodInWeeks);
}
/**
* @dev Method to release any already vested but not yet received tokens
* @param _token address Address of Token
* @notice This emits an Event LogTokenAdded which is indexed by the token address
*/
function release
(
address _token
)
external
{
uint256 unreleased = releaseableAmount(_token);
require(unreleased > 0);
vestingInfo[_token].releasedSupply = vestingInfo[_token].releasedSupply.add(unreleased);
bool success = ERC20(_token).transfer(vestingInfo[_token].vestingBeneficiary, unreleased);
require(success, "transfer from vesting to beneficiary has to succeed");
emit Released(_token, vestingInfo[_token].vestingBeneficiary, unreleased);
}
/**
* @dev Method to check the quantity of token that is already vested but not yet received
* @param _token address Address of Token
* @return uint256 Quantity of token that is already vested but not yet received
*/
function releaseableAmount
(
address _token
)
public
view
returns(uint256)
{
return vestedAmount(_token).sub(vestingInfo[_token].releasedSupply);
}
/**
* @dev Method to check the quantity of token vested at current block
* @param _token address Address of Token
* @return uint256 Quantity of token that is vested at current block
*/
function vestedAmount
(
address _token
)
public
view
returns(uint256)
{
VestingInfo memory info = vestingInfo[_token];
uint256 currentBalance = ERC20(_token).balanceOf(address(this));
uint256 totalBalance = currentBalance.add(info.releasedSupply);
if (now >= info.start.add(info.duration)) {
return totalBalance;
} else {
return totalBalance.mul(now.sub(info.start)).div(info.duration);
}
}
function getVestingInfo
(
address _token
)
external
view
returns(VestingInfo memory)
{
return vestingInfo[_token];
}
}
{
"compilationTarget": {
"TokenVesting.sol": "TokenVesting"
},
"evmVersion": "byzantium",
"libraries": {},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
[{"constant":false,"inputs":[{"name":"_token","type":"address"}],"name":"release","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"WEEKS_IN_SECONDS","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_token","type":"address"}],"name":"vestedAmount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_token","type":"address"}],"name":"releaseableAmount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_token","type":"address"},{"name":"_vestingBeneficiary","type":"address"},{"name":"_vestingPeriodInWeeks","type":"uint256"}],"name":"addToken","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"getOwner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"data","type":"bytes"}],"name":"parseAddr","outputs":[{"name":"parsed","type":"address"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"vestingInfo","outputs":[{"name":"vestingBeneficiary","type":"address"},{"name":"releasedSupply","type":"uint256"},{"name":"start","type":"uint256"},{"name":"duration","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_token","type":"address"}],"name":"getVestingInfo","outputs":[{"components":[{"name":"vestingBeneficiary","type":"address"},{"name":"releasedSupply","type":"uint256"},{"name":"start","type":"uint256"},{"name":"duration","type":"uint256"}],"name":"","type":"tuple"}],"payable":false,"stateMutability":"view","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"token","type":"address"},{"indexed":false,"name":"vestingBeneficiary","type":"address"},{"indexed":false,"name":"amount","type":"uint256"}],"name":"Released","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"token","type":"address"},{"indexed":false,"name":"vestingBeneficiary","type":"address"},{"indexed":false,"name":"vestingPeriodInWeeks","type":"uint256"}],"name":"LogTokenAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"}]