Contract Source Code:
File 1 of 1 : Vanilla
pragma solidity ^0.6.0;
// SPDX-License-Identifier: UNLICENSED
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot 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-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
function ceil(uint256 a, uint256 m) internal pure returns (uint256 r) {
require(m != 0, "SafeMath: to ceil number shall not be zero");
return (a + m - 1) / m * m;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: 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
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address payable public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address payable _newOwner) public onlyOwner {
owner = _newOwner;
emit OwnershipTransferred(msg.sender, _newOwner);
}
}
// ----------------------------------------------------------------------------
// 'VANILLA' token AND staking contract
// Symbol : VNLA
// Name : Vanilla Network
// Total supply: 1,000,000 (1 million)
// Min supply : 100k
// Decimals : 18
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract Vanilla is IERC20, Owned {
using SafeMath for uint256;
string public symbol = "VNLA";
string public name = "Vanilla Network";
uint256 public decimals = 18;
address airdropContract;
uint256 _totalSupply = 98447685 * 10 ** (16); // 984,476.85
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor(address icoContract, address _airdropContract) public {
airdropContract = _airdropContract;
owner = 0xFa50b82cbf2942008A097B6289F39b1bb797C5Cd;
balances[icoContract] = 150000 * 10 ** (18); // 150,000
emit Transfer(address(0), icoContract, 150000 * 10 ** (18));
balances[address(owner)] = 54195664 * 10 ** (16); // 541,956.64
emit Transfer(address(0), address(owner), 54195664 * 10 ** (16));
balances[address(airdropContract)] = 2925202086 * 10 ** (14); // 292520.2086
emit Transfer(address(0), address(airdropContract), 2925202086 * 10 ** (14));
}
/** ERC20Interface function's implementation **/
function totalSupply() external override view returns (uint256){
return _totalSupply;
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) external override view returns (uint256 balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
// ------------------------------------------------------------------------
function approve(address spender, uint256 tokens) external override returns (bool success){
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender,spender,tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) external override view returns (uint256 remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint256 tokens) public override returns (bool success) {
// prevent transfer to 0x0, use burn instead
require(address(to) != address(0));
require(balances[msg.sender] >= tokens );
require(balances[to] + tokens >= balances[to]);
balances[msg.sender] = balances[msg.sender].sub(tokens);
uint256 deduction = deductionsToApply(tokens);
applyDeductions(deduction);
balances[to] = balances[to].add(tokens.sub(deduction));
emit Transfer(msg.sender, to, tokens.sub(deduction));
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint256 tokens) external override returns (bool success){
require(tokens <= allowed[from][msg.sender]); //check allowance
require(balances[from] >= tokens);
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
uint256 deduction = deductionsToApply(tokens);
applyDeductions(deduction);
balances[to] = balances[to].add(tokens.sub(deduction));
emit Transfer(from, to, tokens.sub(tokens));
return true;
}
function _transfer(address to, uint256 tokens, bool rewards) internal returns(bool){
// prevent transfer to 0x0, use burn instead
require(address(to) != address(0));
require(balances[address(this)] >= tokens );
require(balances[to] + tokens >= balances[to]);
balances[address(this)] = balances[address(this)].sub(tokens);
uint256 deduction = 0;
if(!rewards){
deduction = deductionsToApply(tokens);
applyDeductions(deduction);
}
balances[to] = balances[to].add(tokens.sub(deduction));
emit Transfer(address(this),to,tokens.sub(deduction));
return true;
}
function deductionsToApply(uint256 tokens) private view returns(uint256){
uint256 deduction = 0;
uint256 minSupply = 100000 * 10 ** (18);
if(_totalSupply > minSupply && msg.sender != airdropContract){
deduction = onePercent(tokens).mul(5); // 5% transaction cost
if(_totalSupply.sub(deduction) < minSupply)
deduction = _totalSupply.sub(minSupply);
}
return deduction;
}
function applyDeductions(uint256 deduction) private{
if(stakedCoins == 0){
burnTokens(deduction);
}
else{
burnTokens(deduction.div(2));
disburse(deduction.div(2));
}
}
// ------------------------------------------------------------------------
// Burn the ``value` amount of tokens from the `account`
// ------------------------------------------------------------------------
function burnTokens(uint256 value) internal{
require(_totalSupply >= value); // burn only unsold tokens
_totalSupply = _totalSupply.sub(value);
emit Transfer(msg.sender, address(0), value);
}
// ------------------------------------------------------------------------
// Calculates onePercent of the uint256 amount sent
// ------------------------------------------------------------------------
function onePercent(uint256 _tokens) internal pure returns (uint256){
uint256 roundValue = _tokens.ceil(100);
uint onePercentofTokens = roundValue.mul(100).div(100 * 10**uint(2));
return onePercentofTokens;
}
/********************************STAKING CONTRACT**********************************/
uint256 deployTime;
uint256 private totalDividentPoints;
uint256 private unclaimedDividendPoints;
uint256 pointMultiplier = 1000000000000000000;
uint256 public stakedCoins;
uint256 public totalRewardsClaimed;
bool public stakingOpen;
struct Account {
uint256 balance;
uint256 lastDividentPoints;
uint256 timeInvest;
uint256 lastClaimed;
uint256 rewardsClaimed;
uint256 pending;
}
mapping(address => Account) accounts;
function openStaking() external onlyOwner{
require(!stakingOpen, "staking already open");
stakingOpen = true;
}
function STAKE(uint256 _tokens) external returns(bool){
require(stakingOpen, "staking is close");
// gets VANILLA tokens from user to contract address
require(transfer(address(this), _tokens), "In sufficient tokens in user wallet");
// require(_tokens >= 100 * 10 ** (18), "Minimum stake allowed is 100 EZG");
uint256 owing = dividendsOwing(msg.sender);
if(owing > 0) // early stakes
accounts[msg.sender].pending = owing;
addToStake(_tokens);
return true;
}
function addToStake(uint256 _tokens) private{
uint256 deduction = deductionsToApply(_tokens);
if(accounts[msg.sender].balance == 0 ) // first time staking
accounts[msg.sender].timeInvest = now;
stakedCoins = stakedCoins.add(_tokens.sub(deduction));
accounts[msg.sender].balance = accounts[msg.sender].balance.add(_tokens.sub(deduction));
accounts[msg.sender].lastDividentPoints = totalDividentPoints;
accounts[msg.sender].lastClaimed = now;
}
function stakingStartedAt(address user) external view returns(uint256){
return accounts[user].timeInvest;
}
function pendingReward(address _user) external view returns(uint256){
uint256 owing = dividendsOwing(_user);
return owing;
}
function dividendsOwing(address investor) internal view returns (uint256){
uint256 newDividendPoints = totalDividentPoints.sub(accounts[investor].lastDividentPoints);
return (((accounts[investor].balance).mul(newDividendPoints)).div(pointMultiplier)).add(accounts[investor].pending);
}
function updateDividend(address investor) internal returns(uint256){
uint256 owing = dividendsOwing(investor);
if (owing > 0){
unclaimedDividendPoints = unclaimedDividendPoints.sub(owing);
accounts[investor].lastDividentPoints = totalDividentPoints;
accounts[investor].pending = 0;
}
return owing;
}
function activeStake(address _user) external view returns (uint256){
return accounts[_user].balance;
}
function UNSTAKE(uint256 tokens) external returns (bool){
require(accounts[msg.sender].balance > 0);
uint256 owing = updateDividend(msg.sender);
if(owing > 0) // unclaimed reward
accounts[msg.sender].pending = owing;
stakedCoins = stakedCoins.sub(tokens);
require(_transfer(msg.sender, tokens, false));
accounts[msg.sender].balance = accounts[msg.sender].balance.sub(tokens);
return true;
}
function disburse(uint256 amount) internal{
balances[address(this)] = balances[address(this)].add(amount);
uint256 unnormalized = amount.mul(pointMultiplier);
totalDividentPoints = totalDividentPoints.add(unnormalized.div(stakedCoins));
unclaimedDividendPoints = unclaimedDividendPoints.add(amount);
}
function claimReward() external returns(bool){
uint256 owing = updateDividend(msg.sender);
require(owing > 0);
require(_transfer(msg.sender, owing, true));
accounts[msg.sender].rewardsClaimed = accounts[msg.sender].rewardsClaimed.add(owing);
totalRewardsClaimed = totalRewardsClaimed.add(owing);
return true;
}
function rewardsClaimed(address _user) external view returns(uint256 rewardClaimed){
return accounts[_user].rewardsClaimed;
}
function reinvest() external {
uint256 owing = updateDividend(msg.sender);
require(owing > 0);
// if there is any pending reward, people can add it to existing stake
addToStake(owing);
}
}