pragma solidity ^0.6.0;
import "https://github.com/OpenZeppelin/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/contracts/math/SafeMath.sol";
contract CatnipToken is ERC20 {
struct stakeTracker {
uint256 lastBlockChecked;
uint256 rewards;
uint256 nyanStaked;
}
address private owner;
uint256 private rewardsVar;
using SafeERC20 for IERC20;
using SafeMath for uint256;
address private nyanAddress;
IERC20 private nyanToken;
uint256 private _totalNyanStaked;
mapping(address => stakeTracker) private _stakedBalances;
constructor() public ERC20("Catnip", "NIP") {
owner = msg.sender;
_mint(msg.sender, 1000 * (10 ** 18));
rewardsVar = 100000;
}
event Staked(address indexed user, uint256 amount, uint256 totalNyanStaked);
event Withdrawn(address indexed user, uint256 amount);
event Rewards(address indexed user, uint256 reward);
modifier _onlyOwner() {
require(msg.sender == owner);
_;
}
modifier updateStakingReward(address account) {
if (block.number > _stakedBalances[account].lastBlockChecked) {
uint256 rewardBlocks = block.number
.sub(_stakedBalances[account].lastBlockChecked);
if (_stakedBalances[account].nyanStaked > 0) {
_stakedBalances[account].rewards = _stakedBalances[account].rewards
.add(
_stakedBalances[account].nyanStaked
.mul(rewardBlocks)
/ rewardsVar);
}
_stakedBalances[account].lastBlockChecked = block.number;
emit Rewards(account, _stakedBalances[account].rewards);
}
_;
}
function setNyanAddress(address _nyanAddress) public _onlyOwner returns(uint256) {
nyanAddress = _nyanAddress;
nyanToken = IERC20(_nyanAddress);
}
function updatingStakingReward(address account) public returns(uint256) {
if (block.number > _stakedBalances[account].lastBlockChecked) {
uint256 rewardBlocks = block.number
.sub(_stakedBalances[account].lastBlockChecked);
if (_stakedBalances[account].nyanStaked > 0) {
_stakedBalances[account].rewards = _stakedBalances[account].rewards
.add(
_stakedBalances[account].nyanStaked
.mul(rewardBlocks)
/ rewardsVar);
}
_stakedBalances[account].lastBlockChecked = block.number;
emit Rewards(account, _stakedBalances[account].rewards);
}
return(_stakedBalances[account].rewards);
}
function getBlockNum() public view returns (uint256) {
return block.number;
}
function getLastBlockCheckedNum(address _account) public view returns (uint256) {
return _stakedBalances[_account].lastBlockChecked;
}
function getAddressStakeAmount(address _account) public view returns (uint256) {
return _stakedBalances[_account].nyanStaked;
}
function setRewardsVar(uint256 _amount) public _onlyOwner {
rewardsVar = _amount;
}
function totalStakedSupply() public view returns (uint256) {
return _totalNyanStaked;
}
function myRewardsBalance(address account) public view returns (uint256) {
if (block.number > _stakedBalances[account].lastBlockChecked) {
uint256 rewardBlocks = block.number
.sub(_stakedBalances[account].lastBlockChecked);
if (_stakedBalances[account].nyanStaked > 0) {
return _stakedBalances[account].rewards
.add(
_stakedBalances[account].nyanStaked
.mul(rewardBlocks)
/ rewardsVar);
}
}
}
function stake(uint256 amount) public updateStakingReward(msg.sender) {
_totalNyanStaked = _totalNyanStaked.add(amount);
_stakedBalances[msg.sender].nyanStaked = _stakedBalances[msg.sender].nyanStaked.add(amount);
nyanToken.safeTransferFrom(msg.sender, address(this), amount);
emit Staked(msg.sender, amount, _totalNyanStaked);
}
function withdraw(uint256 amount) public updateStakingReward(msg.sender) {
_totalNyanStaked = _totalNyanStaked.sub(amount);
_stakedBalances[msg.sender].nyanStaked = _stakedBalances[msg.sender].nyanStaked.sub(amount);
nyanToken.safeTransfer(msg.sender, amount);
emit Withdrawn(msg.sender, amount);
}
function getReward() public updateStakingReward(msg.sender) {
uint256 reward = _stakedBalances[msg.sender].rewards;
_stakedBalances[msg.sender].rewards = 0;
_mint(msg.sender, reward.mul(8) / 10);
uint256 fundingPoolReward = reward.mul(2) / 10;
_mint(nyanAddress, fundingPoolReward);
emit Rewards(msg.sender, reward);
}
}
{
"compilationTarget": {
"browser/CatnipToken.sol": "CatnipToken"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
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nction"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"updatingStakingReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]