Contract Source Code:
File 1 of 1 : vDODOToken
// File: contracts/intf/IERC20.sol
// This is a file copied from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.6.9;
pragma experimental ABIEncoderV2;
/**
* @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);
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
/**
* @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);
}
// File: contracts/lib/SafeMath.sol
/**
* @title SafeMath
* @author DODO Breeder
*
* @notice Math operations with safety checks that revert on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "MUL_ERROR");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "DIVIDING_ERROR");
return a / b;
}
function divCeil(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 quotient = div(a, b);
uint256 remainder = a - quotient * b;
if (remainder > 0) {
return quotient + 1;
} else {
return quotient;
}
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SUB_ERROR");
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "ADD_ERROR");
return c;
}
function sqrt(uint256 x) internal pure returns (uint256 y) {
uint256 z = x / 2 + 1;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
}
// File: contracts/lib/DecimalMath.sol
/**
* @title DecimalMath
* @author DODO Breeder
*
* @notice Functions for fixed point number with 18 decimals
*/
library DecimalMath {
using SafeMath for uint256;
uint256 internal constant ONE = 10**18;
uint256 internal constant ONE2 = 10**36;
function mulFloor(uint256 target, uint256 d) internal pure returns (uint256) {
return target.mul(d) / (10**18);
}
function mulCeil(uint256 target, uint256 d) internal pure returns (uint256) {
return target.mul(d).divCeil(10**18);
}
function divFloor(uint256 target, uint256 d) internal pure returns (uint256) {
return target.mul(10**18).div(d);
}
function divCeil(uint256 target, uint256 d) internal pure returns (uint256) {
return target.mul(10**18).divCeil(d);
}
function reciprocalFloor(uint256 target) internal pure returns (uint256) {
return uint256(10**36).div(target);
}
function reciprocalCeil(uint256 target) internal pure returns (uint256) {
return uint256(10**36).divCeil(target);
}
}
// File: contracts/lib/InitializableOwnable.sol
/**
* @title Ownable
* @author DODO Breeder
*
* @notice Ownership related functions
*/
contract InitializableOwnable {
address public _OWNER_;
address public _NEW_OWNER_;
bool internal _INITIALIZED_;
// ============ Events ============
event OwnershipTransferPrepared(address indexed previousOwner, address indexed newOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
// ============ Modifiers ============
modifier notInitialized() {
require(!_INITIALIZED_, "DODO_INITIALIZED");
_;
}
modifier onlyOwner() {
require(msg.sender == _OWNER_, "NOT_OWNER");
_;
}
// ============ Functions ============
function initOwner(address newOwner) public notInitialized {
_INITIALIZED_ = true;
_OWNER_ = newOwner;
}
function transferOwnership(address newOwner) public onlyOwner {
emit OwnershipTransferPrepared(_OWNER_, newOwner);
_NEW_OWNER_ = newOwner;
}
function claimOwnership() public {
require(msg.sender == _NEW_OWNER_, "INVALID_CLAIM");
emit OwnershipTransferred(_OWNER_, _NEW_OWNER_);
_OWNER_ = _NEW_OWNER_;
_NEW_OWNER_ = address(0);
}
}
// File: contracts/lib/SafeERC20.sol
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(
token,
abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
);
}
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: contracts/intf/IDODOApprove.sol
interface IDODOApprove {
function claimTokens(address token,address who,address dest,uint256 amount) external;
function getDODOProxy() external view returns (address);
}
// File: contracts/SmartRoute/DODOApproveProxy.sol
interface IDODOApproveProxy {
function isAllowedProxy(address _proxy) external view returns (bool);
function claimTokens(address token,address who,address dest,uint256 amount) external;
}
/**
* @title DODOApproveProxy
* @author DODO Breeder
*
* @notice Allow different version dodoproxy to claim from DODOApprove
*/
contract DODOApproveProxy is InitializableOwnable {
// ============ Storage ============
uint256 private constant _TIMELOCK_DURATION_ = 3 days;
mapping (address => bool) public _IS_ALLOWED_PROXY_;
uint256 public _TIMELOCK_;
address public _PENDING_ADD_DODO_PROXY_;
address public immutable _DODO_APPROVE_;
// ============ Modifiers ============
modifier notLocked() {
require(
_TIMELOCK_ <= block.timestamp,
"SetProxy is timelocked"
);
_;
}
constructor(address dodoApporve) public {
_DODO_APPROVE_ = dodoApporve;
}
function init(address owner, address[] memory proxies) external {
initOwner(owner);
for(uint i = 0; i < proxies.length; i++)
_IS_ALLOWED_PROXY_[proxies[i]] = true;
}
function unlockAddProxy(address newDodoProxy) public onlyOwner {
_TIMELOCK_ = block.timestamp + _TIMELOCK_DURATION_;
_PENDING_ADD_DODO_PROXY_ = newDodoProxy;
}
function lockAddProxy() public onlyOwner {
_PENDING_ADD_DODO_PROXY_ = address(0);
_TIMELOCK_ = 0;
}
function addDODOProxy() external onlyOwner notLocked() {
_IS_ALLOWED_PROXY_[_PENDING_ADD_DODO_PROXY_] = true;
lockAddProxy();
}
function removeDODOProxy (address oldDodoProxy) public onlyOwner {
_IS_ALLOWED_PROXY_[oldDodoProxy] = false;
}
function claimTokens(
address token,
address who,
address dest,
uint256 amount
) external {
require(_IS_ALLOWED_PROXY_[msg.sender], "DODOApproveProxy:Access restricted");
IDODOApprove(_DODO_APPROVE_).claimTokens(
token,
who,
dest,
amount
);
}
function isAllowedProxy(address _proxy) external view returns (bool) {
return _IS_ALLOWED_PROXY_[_proxy];
}
}
// File: contracts/DODOToken/vDODOToken.sol
interface IGovernance {
function getLockedvDODO(address account) external view returns (uint256);
}
interface IDODOCirculationHelper {
// Locked vDOOD not counted in circulation
function getCirculation() external view returns (uint256);
function getDodoWithdrawFeeRatio() external view returns (uint256);
}
contract vDODOToken is InitializableOwnable {
using SafeMath for uint256;
// ============ Storage(ERC20) ============
string public name = "vDODO Membership Token";
string public symbol = "vDODO";
uint8 public decimals = 18;
mapping(address => mapping(address => uint256)) internal _ALLOWED_;
// ============ Storage ============
address public immutable _DODO_TOKEN_;
address public immutable _DODO_APPROVE_PROXY_;
address public immutable _DODO_TEAM_;
address public _DOOD_GOV_;
address public _DODO_CIRCULATION_HELPER_;
bool public _CAN_TRANSFER_;
// staking reward parameters
uint256 public _DODO_PER_BLOCK_;
uint256 public constant _SUPERIOR_RATIO_ = 10**17; // 0.1
uint256 public constant _DODO_RATIO_ = 100; // 100
uint256 public _DODO_FEE_BURN_RATIO_;
// accounting
uint112 public alpha = 10**18; // 1
uint112 public _TOTAL_BLOCK_DISTRIBUTION_;
uint32 public _LAST_REWARD_BLOCK_;
uint256 public _TOTAL_BLOCK_REWARD_;
uint256 public _TOTAL_STAKING_POWER_;
mapping(address => UserInfo) public userInfo;
struct UserInfo {
uint128 stakingPower;
uint128 superiorSP;
address superior;
uint256 credit;
}
// ============ Events ============
event MintVDODO(address user, address superior, uint256 mintDODO);
event RedeemVDODO(address user, uint256 receiveDODO, uint256 burnDODO, uint256 feeDODO);
event DonateDODO(address user, uint256 donateDODO);
event SetCantransfer(bool allowed);
event PreDeposit(uint256 dodoAmount);
event ChangePerReward(uint256 dodoPerBlock);
event UpdateDODOFeeBurnRatio(uint256 dodoFeeBurnRatio);
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
// ============ Modifiers ============
modifier canTransfer() {
require(_CAN_TRANSFER_, "vDODOToken: not allowed transfer");
_;
}
modifier balanceEnough(address account, uint256 amount) {
require(availableBalanceOf(account) >= amount, "vDODOToken: available amount not enough");
_;
}
// ============ Constructor ============
constructor(
address dodoGov,
address dodoToken,
address dodoApproveProxy,
address dodoTeam
) public {
_DOOD_GOV_ = dodoGov;
_DODO_TOKEN_ = dodoToken;
_DODO_APPROVE_PROXY_ = dodoApproveProxy;
_DODO_TEAM_ = dodoTeam;
}
// ============ Ownable Functions ============`
function setCantransfer(bool allowed) public onlyOwner {
_CAN_TRANSFER_ = allowed;
emit SetCantransfer(allowed);
}
function changePerReward(uint256 dodoPerBlock) public onlyOwner {
_updateAlpha();
_DODO_PER_BLOCK_ = dodoPerBlock;
emit ChangePerReward(dodoPerBlock);
}
function updateDODOFeeBurnRatio(uint256 dodoFeeBurnRatio) public onlyOwner {
_DODO_FEE_BURN_RATIO_ = dodoFeeBurnRatio;
emit UpdateDODOFeeBurnRatio(_DODO_FEE_BURN_RATIO_);
}
function updateDODOCirculationHelper(address helper) public onlyOwner {
_DODO_CIRCULATION_HELPER_ = helper;
}
function updateGovernance(address governance) public onlyOwner {
_DOOD_GOV_ = governance;
}
function emergencyWithdraw() public onlyOwner {
uint256 dodoBalance = IERC20(_DODO_TOKEN_).balanceOf(address(this));
IERC20(_DODO_TOKEN_).transfer(_OWNER_, dodoBalance);
}
// ============ Mint & Redeem & Donate ============
function mint(uint256 dodoAmount, address superiorAddress) public {
require(
superiorAddress != address(0) && superiorAddress != msg.sender,
"vDODOToken: Superior INVALID"
);
require(dodoAmount > 0, "vDODOToken: must mint greater than 0");
UserInfo storage user = userInfo[msg.sender];
if (user.superior == address(0)) {
require(
superiorAddress == _DODO_TEAM_ || userInfo[superiorAddress].superior != address(0),
"vDODOToken: INVALID_SUPERIOR_ADDRESS"
);
user.superior = superiorAddress;
}
_updateAlpha();
IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens(
_DODO_TOKEN_,
msg.sender,
address(this),
dodoAmount
);
uint256 newStakingPower = DecimalMath.divFloor(dodoAmount, alpha);
_mint(user, newStakingPower);
emit MintVDODO(msg.sender, superiorAddress, dodoAmount);
}
function redeem(uint256 vdodoAmount, bool all) public balanceEnough(msg.sender, vdodoAmount) {
_updateAlpha();
UserInfo storage user = userInfo[msg.sender];
uint256 dodoAmount;
uint256 stakingPower;
if (all) {
stakingPower = uint256(user.stakingPower).sub(DecimalMath.divFloor(user.credit, alpha));
dodoAmount = DecimalMath.mulFloor(stakingPower, alpha);
} else {
dodoAmount = vdodoAmount.mul(_DODO_RATIO_);
stakingPower = DecimalMath.divFloor(dodoAmount, alpha);
}
_redeem(user, stakingPower);
(uint256 dodoReceive, uint256 burnDodoAmount, uint256 withdrawFeeDodoAmount) = getWithdrawResult(dodoAmount);
IERC20(_DODO_TOKEN_).transfer(msg.sender, dodoReceive);
if (burnDodoAmount > 0) {
IERC20(_DODO_TOKEN_).transfer(address(0), burnDodoAmount);
}
if (withdrawFeeDodoAmount > 0) {
alpha = uint112(
uint256(alpha).add(
DecimalMath.divFloor(withdrawFeeDodoAmount, _TOTAL_STAKING_POWER_)
)
);
}
emit RedeemVDODO(msg.sender, dodoReceive, burnDodoAmount, withdrawFeeDodoAmount);
}
function donate(uint256 dodoAmount) public {
IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens(
_DODO_TOKEN_,
msg.sender,
address(this),
dodoAmount
);
alpha = uint112(
uint256(alpha).add(DecimalMath.divFloor(dodoAmount, _TOTAL_STAKING_POWER_))
);
emit DonateDODO(msg.sender, dodoAmount);
}
function preDepositedBlockReward(uint256 dodoAmount) public {
IDODOApproveProxy(_DODO_APPROVE_PROXY_).claimTokens(
_DODO_TOKEN_,
msg.sender,
address(this),
dodoAmount
);
_TOTAL_BLOCK_REWARD_ = _TOTAL_BLOCK_REWARD_.add(dodoAmount);
emit PreDeposit(dodoAmount);
}
// ============ ERC20 Functions ============
function totalSupply() public view returns (uint256 vDODOSupply) {
uint256 totalDODO = IERC20(_DODO_TOKEN_).balanceOf(address(this));
(,uint256 curDistribution) = getLatestAlpha();
uint256 actualDODO = totalDODO.sub(_TOTAL_BLOCK_REWARD_.sub(curDistribution.add(_TOTAL_BLOCK_DISTRIBUTION_)));
vDODOSupply = actualDODO / _DODO_RATIO_;
}
function balanceOf(address account) public view returns (uint256 vDODOAmount) {
vDODOAmount = dodoBalanceOf(account) / _DODO_RATIO_;
}
function transfer(address to, uint256 vDODOAmount) public returns (bool) {
_updateAlpha();
_transfer(msg.sender, to, vDODOAmount);
return true;
}
function approve(address spender, uint256 vDODOAmount) canTransfer public returns (bool) {
_ALLOWED_[msg.sender][spender] = vDODOAmount;
emit Approval(msg.sender, spender, vDODOAmount);
return true;
}
function transferFrom(
address from,
address to,
uint256 vDODOAmount
) public returns (bool) {
require(vDODOAmount <= _ALLOWED_[from][msg.sender], "ALLOWANCE_NOT_ENOUGH");
_updateAlpha();
_transfer(from, to, vDODOAmount);
_ALLOWED_[from][msg.sender] = _ALLOWED_[from][msg.sender].sub(vDODOAmount);
return true;
}
function allowance(address owner, address spender) public view returns (uint256) {
return _ALLOWED_[owner][spender];
}
// ============ Helper Functions ============
function getLatestAlpha() public view returns (uint256 newAlpha, uint256 curDistribution) {
if (_LAST_REWARD_BLOCK_ == 0) {
curDistribution = 0;
} else {
curDistribution = _DODO_PER_BLOCK_ * (block.number - _LAST_REWARD_BLOCK_);
}
if (_TOTAL_STAKING_POWER_ > 0) {
newAlpha = uint256(alpha).add(DecimalMath.divFloor(curDistribution, _TOTAL_STAKING_POWER_));
} else {
newAlpha = alpha;
}
}
function availableBalanceOf(address account) public view returns (uint256 vDODOAmount) {
if (_DOOD_GOV_ == address(0)) {
vDODOAmount = balanceOf(account);
} else {
uint256 lockedvDODOAmount = IGovernance(_DOOD_GOV_).getLockedvDODO(account);
vDODOAmount = balanceOf(account).sub(lockedvDODOAmount);
}
}
function dodoBalanceOf(address account) public view returns (uint256 dodoAmount) {
UserInfo memory user = userInfo[account];
(uint256 newAlpha,) = getLatestAlpha();
uint256 nominalDodo = DecimalMath.mulFloor(uint256(user.stakingPower), newAlpha);
if(nominalDodo > user.credit) {
dodoAmount = nominalDodo - user.credit;
}else {
dodoAmount = 0;
}
}
function getWithdrawResult(uint256 dodoAmount)
public
view
returns (
uint256 dodoReceive,
uint256 burnDodoAmount,
uint256 withdrawFeeDodoAmount
)
{
uint256 feeRatio =
IDODOCirculationHelper(_DODO_CIRCULATION_HELPER_).getDodoWithdrawFeeRatio();
withdrawFeeDodoAmount = DecimalMath.mulFloor(dodoAmount, feeRatio);
dodoReceive = dodoAmount.sub(withdrawFeeDodoAmount);
burnDodoAmount = DecimalMath.mulFloor(withdrawFeeDodoAmount, _DODO_FEE_BURN_RATIO_);
withdrawFeeDodoAmount = withdrawFeeDodoAmount.sub(burnDodoAmount);
}
function getDODOWithdrawFeeRatio() public view returns (uint256 feeRatio) {
feeRatio = IDODOCirculationHelper(_DODO_CIRCULATION_HELPER_).getDodoWithdrawFeeRatio();
}
function getSuperior(address account) public view returns (address superior) {
return userInfo[account].superior;
}
// ============ Internal Functions ============
function _updateAlpha() internal {
(uint256 newAlpha, uint256 curDistribution) = getLatestAlpha();
uint256 newTotalDistribution = curDistribution.add(_TOTAL_BLOCK_DISTRIBUTION_);
require(newAlpha <= uint112(-1) && newTotalDistribution <= uint112(-1), "OVERFLOW");
alpha = uint112(newAlpha);
_TOTAL_BLOCK_DISTRIBUTION_ = uint112(newTotalDistribution);
_LAST_REWARD_BLOCK_ = uint32(block.number);
}
function _mint(UserInfo storage to, uint256 stakingPower) internal {
require(stakingPower <= uint128(-1), "OVERFLOW");
UserInfo storage superior = userInfo[to.superior];
uint256 superiorIncreSP = DecimalMath.mulFloor(stakingPower, _SUPERIOR_RATIO_);
uint256 superiorIncreCredit = DecimalMath.mulFloor(superiorIncreSP, alpha);
to.stakingPower = uint128(uint256(to.stakingPower).add(stakingPower));
to.superiorSP = uint128(uint256(to.superiorSP).add(superiorIncreSP));
superior.stakingPower = uint128(uint256(superior.stakingPower).add(superiorIncreSP));
superior.credit = uint128(uint256(superior.credit).add(superiorIncreCredit));
_TOTAL_STAKING_POWER_ = _TOTAL_STAKING_POWER_.add(stakingPower).add(superiorIncreSP);
}
function _redeem(UserInfo storage from, uint256 stakingPower) internal {
from.stakingPower = uint128(uint256(from.stakingPower).sub(stakingPower));
// superior decrease sp = min(stakingPower*0.1, from.superiorSP)
uint256 superiorDecreSP = DecimalMath.mulFloor(stakingPower, _SUPERIOR_RATIO_);
superiorDecreSP = from.superiorSP <= superiorDecreSP ? from.superiorSP : superiorDecreSP;
from.superiorSP = uint128(uint256(from.superiorSP).sub(superiorDecreSP));
UserInfo storage superior = userInfo[from.superior];
uint256 creditSP = DecimalMath.divFloor(superior.credit, alpha);
if (superiorDecreSP >= creditSP) {
superior.credit = 0;
superior.stakingPower = uint128(uint256(superior.stakingPower).sub(creditSP));
} else {
superior.credit = uint128(
uint256(superior.credit).sub(DecimalMath.mulFloor(superiorDecreSP, alpha))
);
superior.stakingPower = uint128(uint256(superior.stakingPower).sub(superiorDecreSP));
}
_TOTAL_STAKING_POWER_ = _TOTAL_STAKING_POWER_.sub(stakingPower).sub(superiorDecreSP);
}
function _transfer(
address from,
address to,
uint256 vDODOAmount
) internal canTransfer balanceEnough(from, vDODOAmount) {
require(from != address(0), "transfer from the zero address");
require(to != address(0), "transfer to the zero address");
require(from != to, "transfer from same with to");
uint256 stakingPower = DecimalMath.divFloor(vDODOAmount * _DODO_RATIO_, alpha);
UserInfo storage fromUser = userInfo[from];
UserInfo storage toUser = userInfo[to];
_redeem(fromUser, stakingPower);
_mint(toUser, stakingPower);
emit Transfer(from, to, vDODOAmount);
}
}