Address Contract Verified
Address
0xE5f24791E273Cb96A1f8E5B67Bc2397F0AD9B8B4
Balance
0 ETH
Nonce
1
Code Size
6046 bytes
Creator
0x11EC7849...710D at tx 0x7c516925...a44978
Indexed Transactions
0 (1 on-chain, 1.2% indexed)
Contract Bytecode
6046 bytes
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Verified Source Code Full Match
Compiler: v0.8.21+commit.d9974bed
EVM: paris
Optimization: Yes (200 runs)
DolaSavings.sol 206 lines
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.21;
interface IERC20 {
function transfer(address, uint) external returns (bool);
function transferFrom(address, address, uint) external returns (bool);
function balanceOf(address) external view returns (uint);
}
interface IDBR {
function mint(address, uint) external;
}
/**
* @title DolaSavings
* @dev Smart contract for staking DOLA tokens to earn DBR rewards.
*/
contract DolaSavings {
IDBR public immutable dbr;
IERC20 public immutable dola;
address public gov;
address public pendingGov;
address public operator;
uint public constant mantissa = 10**18;
uint public maxYearlyRewardBudget;
uint public maxRewardPerDolaMantissa = 10**18; // 1 DBR per DOLA
uint public yearlyRewardBudget; // starts at 0
uint public lastUpdate;
uint public rewardIndexMantissa;
uint public totalSupply;
mapping (address => uint) public balanceOf;
mapping (address => uint) public stakerIndexMantissa;
mapping (address => uint) public accruedRewards;
/**
* @dev Modifier to update the reward index for the whole contract as well as for a specific user.
* Calculates rewards based on the time elapsed and the total supply staked.
* @param user Address of the user for whom to update the index.
*/
modifier updateIndex(address user) {
uint deltaT = block.timestamp - lastUpdate;
if(deltaT > 0) {
if(yearlyRewardBudget > 0 && totalSupply > 0) {
uint _totalSupply = totalSupply;
uint _yearlyRewardBudget = yearlyRewardBudget;
uint maxBudget = maxRewardPerDolaMantissa * _totalSupply / mantissa;
uint budget = _yearlyRewardBudget > maxBudget ? maxBudget : _yearlyRewardBudget;
uint rewardsAccrued = deltaT * budget * mantissa / 365 days;
rewardIndexMantissa += rewardsAccrued / _totalSupply;
}
lastUpdate = block.timestamp;
}
uint deltaIndex = rewardIndexMantissa - stakerIndexMantissa[user];
uint bal = balanceOf[user];
uint stakerDelta = bal * deltaIndex;
stakerIndexMantissa[user] = rewardIndexMantissa;
accruedRewards[user] += stakerDelta / mantissa;
_;
}
modifier onlyGov() {
require(msg.sender == gov, "ONLY GOV");
_;
}
modifier onlyOperator() {
require(msg.sender == operator, "ONLY OPERATOR");
_;
}
/**
* @dev Constructor for DolaSavings.
* @param _dbr Address of the DBR token contract.
* @param _dola Address of the DOLA token contract.
* @param _gov Address of governance.
* @param _operator Address of the operator.
*/
constructor (address _dbr, address _dola, address _gov, address _operator) {
dbr = IDBR(_dbr);
dola = IERC20(_dola);
gov = _gov;
operator = _operator;
lastUpdate = block.timestamp;
}
function setOperator(address _operator) external onlyGov { operator = _operator; }
function setPendingGov(address _gov) external onlyGov { pendingGov = _gov; }
function acceptGov() external {
require(msg.sender == pendingGov, "Only pendingGov");
gov = pendingGov;
pendingGov = address(0);
}
/**
* @dev Sets the maximum yearly reward budget.
* @param _max The maximum yearly reward budget.
*/
function setMaxYearlyRewardBudget(uint _max) external onlyGov updateIndex(msg.sender) {
maxYearlyRewardBudget = _max;
if(yearlyRewardBudget > _max) {
yearlyRewardBudget = _max;
emit SetYearlyRewardBudget(_max);
}
emit SetMaxYearlyRewardBudget(_max);
}
/**
* @dev Sets the maximum reward per DOLA in mantissa.
* @param _max The maximum reward per DOLA in mantissa.
*/
function setMaxRewardPerDolaMantissa(uint _max) external onlyGov updateIndex(msg.sender) {
require(_max < type(uint).max / (mantissa * 10 ** 13)); //May overflow if set to max and more than 10 trillion DOLA has been deposited
maxRewardPerDolaMantissa = _max;
emit SetMaxRewardPerDolaMantissa(_max);
}
/**
* @dev Sets the yearly reward budget.
* @param _yearlyRewardBudget The yearly reward budget.
*/
function setYearlyRewardBudget(uint _yearlyRewardBudget) external onlyOperator updateIndex(msg.sender) {
require(_yearlyRewardBudget <= maxYearlyRewardBudget, "REWARD BUDGET ABOVE MAX");
yearlyRewardBudget = _yearlyRewardBudget;
emit SetYearlyRewardBudget(_yearlyRewardBudget);
}
/**
* @dev Stakes DOLA tokens.
* @param amount The amount of DOLA tokens to stake.
* @param recipient The address of the recipient.
*/
function stake(uint amount, address recipient) external updateIndex(recipient) {
require(recipient != address(0), "Zero address");
balanceOf[recipient] += amount;
totalSupply += amount;
dola.transferFrom(msg.sender, address(this), amount);
emit Stake(msg.sender, recipient, amount);
}
/**
* @dev Unstakes DOLA tokens.
* @param amount The amount of DOLA tokens to unstake.
*/
function unstake(uint amount) external updateIndex(msg.sender) {
balanceOf[msg.sender] -= amount;
totalSupply -= amount;
dola.transfer(msg.sender, amount);
emit Unstake(msg.sender, amount);
}
/**
* @dev Calculates the claimable rewards for a user.
* @param user The address of the user.
* @return The amount of claimable rewards.
*/
function claimable(address user) external view returns(uint) {
uint _totalSupply = totalSupply;
uint _yearlyRewardBudget = yearlyRewardBudget;
uint _rewardIndexMantissa = rewardIndexMantissa;
uint deltaT = block.timestamp - lastUpdate;
uint maxBudget = maxRewardPerDolaMantissa * _totalSupply / mantissa;
uint budget = _yearlyRewardBudget > maxBudget ? maxBudget : _yearlyRewardBudget;
uint rewardsAccrued = deltaT * budget * mantissa / 365 days;
_rewardIndexMantissa = _totalSupply > 0 ? _rewardIndexMantissa + rewardsAccrued / _totalSupply : _rewardIndexMantissa;
uint deltaIndex = _rewardIndexMantissa - stakerIndexMantissa[user];
uint bal = balanceOf[user];
uint stakerDelta = bal * deltaIndex / mantissa;
return (accruedRewards[user] + stakerDelta);
}
/**
* @dev Claims the accrued rewards of the msg.sender and mints DBR tokens to the specified address.
* @param to The address to receive the claimed DBR tokens.
*/
function claim(address to) external updateIndex(msg.sender) {
uint accrued = accruedRewards[msg.sender];
dbr.mint(to, accrued);
accruedRewards[msg.sender] = 0;
emit Claim(msg.sender, to, accrued);
}
/**
* @dev Transfers out any ERC20 tokens from the contract.
* Ensures that user staked DOLA cannot be swept.
* @param token The address of the ERC20 token to sweep.
* @param amount The amount of tokens to sweep.
* @param to The recipient address of the swept tokens.
*/
function sweep(address token, uint amount, address to) external onlyGov {
if(token == address(dola)) {
require(IERC20(token).balanceOf(address(this)) - totalSupply >= amount, "CANNOT SWEEP USER DOLA");
}
IERC20(token).transfer(to, amount);
}
event Stake(address indexed caller, address indexed recipient, uint amount);
event Unstake(address indexed caller, uint amount);
event Claim(address indexed caller, address indexed recipient, uint claimed);
event SetYearlyRewardBudget(uint newYearlyRewardBudget);
event SetMaxRewardPerDolaMantissa(uint newMax);
event SetMaxYearlyRewardBudget(uint newMax);
}
Read Contract
accruedRewards 0x128fced1 → uint256
balanceOf 0x70a08231 → uint256
claimable 0x402914f5 → uint256
dbr 0xc7ed69cd → address
dola 0xea0593e4 → address
gov 0x12d43a51 → address
lastUpdate 0xc0463711 → uint256
mantissa 0x5c8177a2 → uint256
maxRewardPerDolaMantissa 0x5668a734 → uint256
maxYearlyRewardBudget 0xb43612e3 → uint256
operator 0x570ca735 → address
pendingGov 0x25240810 → address
rewardIndexMantissa 0x4ae4ab92 → uint256
stakerIndexMantissa 0x233e4daa → uint256
totalSupply 0x18160ddd → uint256
yearlyRewardBudget 0x1112b183 → uint256
Write Contract 10 functions
These functions modify contract state and require a wallet transaction to execute.
acceptGov 0x7bc6729b
No parameters
claim 0x1e83409a
address to
setMaxRewardPerDolaMantissa 0xb80eacc2
uint256 _max
setMaxYearlyRewardBudget 0x7496cbb2
uint256 _max
setOperator 0xb3ab15fb
address _operator
setPendingGov 0xefdf0bb0
address _gov
setYearlyRewardBudget 0x2ff3e04e
uint256 _yearlyRewardBudget
stake 0x7acb7757
uint256 amount
address recipient
sweep 0xdc2c256f
address token
uint256 amount
address to
unstake 0x2e17de78
uint256 amount
Recent Transactions
This address has 1 on-chain transactions, but only 1.2% of the chain is indexed. Transactions will appear as indexing progresses. View on Etherscan →