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veRGT #2

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1e98fd5
veRGT
sriyantra Oct 8, 2021
9c5efd4
Update hardhat.config.js
sriyantra Oct 8, 2021
02314f1
add test
sriyantra Oct 8, 2021
2ff1179
tests
sriyantra Oct 8, 2021
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222 changes: 222 additions & 0 deletions ERC20_abi.json
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Original file line number Diff line number Diff line change
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[
{
"constant": true,
"inputs": [],
"name": "name",
"outputs": [
{
"name": "",
"type": "string"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "_spender",
"type": "address"
},
{
"name": "_value",
"type": "uint256"
}
],
"name": "approve",
"outputs": [
{
"name": "",
"type": "bool"
}
],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "totalSupply",
"outputs": [
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "_from",
"type": "address"
},
{
"name": "_to",
"type": "address"
},
{
"name": "_value",
"type": "uint256"
}
],
"name": "transferFrom",
"outputs": [
{
"name": "",
"type": "bool"
}
],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "decimals",
"outputs": [
{
"name": "",
"type": "uint8"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "_owner",
"type": "address"
}
],
"name": "balanceOf",
"outputs": [
{
"name": "balance",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "symbol",
"outputs": [
{
"name": "",
"type": "string"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "_to",
"type": "address"
},
{
"name": "_value",
"type": "uint256"
}
],
"name": "transfer",
"outputs": [
{
"name": "",
"type": "bool"
}
],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "_owner",
"type": "address"
},
{
"name": "_spender",
"type": "address"
}
],
"name": "allowance",
"outputs": [
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
{
"payable": true,
"stateMutability": "payable",
"type": "fallback"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"name": "owner",
"type": "address"
},
{
"indexed": true,
"name": "spender",
"type": "address"
},
{
"indexed": false,
"name": "value",
"type": "uint256"
}
],
"name": "Approval",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"name": "from",
"type": "address"
},
{
"indexed": true,
"name": "to",
"type": "address"
},
{
"indexed": false,
"name": "value",
"type": "uint256"
}
],
"name": "Transfer",
"type": "event"
}
]
136 changes: 136 additions & 0 deletions contracts/FuseBorrowGauge.sol
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pragma solidity ^0.5.16;

import "./CToken.sol";
import "./ExponentialNoError.sol";
import "./ComptrollerStorage.sol";
import "./IveRGT.sol";
import "./IFuseGaugeController.sol";
import "./Math.sol";
import "./SafeMath.sol";
import "./EIP20Interface.sol";
import "./RewardsDistributor.sol";
import "./ReentrancyGuard.sol";

contract FuseBorrowGauge is ReentrancyGuard {
using SafeMath for uint256;

/* ========== STATE VARIABLES ========== */

// Instances
IveRGT private veRGT;
IFuseGaugeController public gaugeController;
RewardsDistributor public rewardsDistributor;
CToken public cToken;

// Admin address
address public admin;

// Constant for various precisions
uint256 private constant MULTIPLIER_PRECISION = 1e18;

// Reward and period related
uint256 private periodFinish;
uint256 private lastUpdateTime;
uint256 public reward_rate_manual;
uint256 public rewardsDuration = 604800; // 7 * 86400 (7 days)

// Rewards tracking
uint256 private rewardPerTokenStored;
mapping(address => uint256) private userRewardPerTokenPaid;
mapping(address => uint256) private rewards;

uint256 private _totalSupply;
uint public derivedSupply;
mapping(address => uint256) private _balances;
mapping(address => uint256) public derivedBalances;
mapping(address => uint) private _base;

uint256 private last_gauge_relative_weight;
uint256 private last_gauge_time_total;

/* ========== CONSTRUCTOR ========== */

constructor(
address _cToken_address,
address _rewardsDistributor_address,
address _veRGT_address
) public {
admin = msg.sender;
cToken = CToken(_cToken_address);
rewardsDistributor = RewardsDistributor(_rewardsDistributor_address);
veRGT = IveRGT(_veRGT_address);

// Manual reward rate
reward_rate_manual = 0;

// Initialize
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(rewardsDuration);
}

/* ========== VIEWS ========== */
function totalSupply() external view returns (uint256) {
return cToken.totalSupply();
}

function balanceOf(address account) external view returns (uint256) {
return cToken.balanceOf(account);
}

/**
* @notice Get rewards boost multiplier for account, based on amount of
* veRGT the user holds, up to max boost
* @param account the account which is being queried
* @dev earned weight is calculated: default boost is 1x
* rewards and max boost factor is 2.5x rewards
* Example: There are 1,000 veRGT total and 10,000 supply of CTokens.
* User A has 0 veRGT and 1,000 CTokens for this gauge's market --> BF = 0.4 --> 0.4/0.4 = 1x boost
* User B has 100 veRGT and 1,000 CTokens --> BF = 1 --> 1/0.4 = 2.5x boost
*/
function getBoostMultiplier(address account) public view returns (uint256) {
uint derivedBalance = derivedBalance(account);
return ((derivedBalance * MULTIPLIER_PRECISION) / cToken.balanceOf(account));
}

function derivedBalance(address account) public view returns (uint) {
if (veRGT.totalSupply() == 0) return 0;
uint _balance = cToken.balanceOf(account);
uint _derived = _balance.mul(40).div(100);
uint _adjusted = (cToken.totalSupply().mul(veRGT.balanceOf(account)).div(veRGT.totalSupply())).mul(60).div(100);
return Math.min(_derived.add(_adjusted), _balance);
}

function lastTimeRewardApplicable() internal view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}

function rewardRate() public view returns (uint256 rwd_rate) {
if (address(gaugeController) != address(0)) {
rwd_rate = (gaugeController.global_emission_rate()).mul(last_gauge_relative_weight).div(1e18);
}
else {
rwd_rate = reward_rate_manual;
}
}

function getRewardForDuration() external view returns (uint256) {
return rewardRate().mul(rewardsDuration);
}

/* ========== MUTATIVE FUNCTIONS ========== */

// Two different getReward functions are needed because of delegateCall and msg.sender issues (important for migration)
function getReward() external nonReentrant returns (uint256) {
sync(false);
rewardsDistributor.claimRewards(msg.sender);
}

function sync(bool force_update) public {
if (address(gaugeController) != address(0) && (force_update || (block.timestamp > last_gauge_time_total))) {
// Update the gauge_relative_weight
last_gauge_relative_weight = gaugeController.gauge_relative_weight_write(address(this), block.timestamp);
last_gauge_time_total = gaugeController.time_total();
rewardsDistributor._setCompBorrowSpeed(address(this));
}
}
}
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