Contract Address Details

0xE3e184a7b75D0Ae6E17B58F5283b91B4E0A2604F

MasterChefVoltV3 Last Balance Update: Block #20503915
Created by 0x5cff77–ca45b4 at 0xe21bbe–e622cf

Balance

0 Fuse

Fetching tokens...

Contract name:
MasterChefVoltV3




Optimization enabled
true
Compiler version
v0.6.12+commit.27d51765




Optimization runs
200
EVM Version
default




Verified at
2022-03-09 12:43:28.830149Z

Constructor Arguments

000000000000000000000000c71e27c7e128d9caeb2b8ca756647f7f199cf39e00000000000000000000000034ef2cc892a88415e9f02b91bfa9c91fc0be6bd40000000000000000000000000000000000000000000000000000000000000000

Arg [0] (address) : 0xc71e27c7e128d9caeb2b8ca756647f7f199cf39e
Arg [1] (address) : 0x34ef2cc892a88415e9f02b91bfa9c91fc0be6bd4
Arg [2] (uint256) : 0

              

Contract source code

// SPDX-License-Identifier: MIXED
// File @openzeppelin/contracts/utils/Context.sol@v3.4.2
// License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File @openzeppelin/contracts/access/Ownable.sol@v3.4.2
// License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File @openzeppelin/contracts/math/SafeMath.sol@v3.4.2
// License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// File @openzeppelin/contracts/utils/EnumerableSet.sol@v3.4.2
// License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// File @openzeppelin/contracts/utils/ReentrancyGuard.sol@v3.4.2
// License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File contracts/interfaces/IERC20.sol
// License-Identifier: MIT
pragma solidity 0.6.12;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
// EIP 2612
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
// File contracts/MasterChefVoltV3.sol
// License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IMasterChef {
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
}
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. VOLT to distribute per block.
uint256 lastRewardTimestamp; // Last block number that VOLT distribution occurs.
uint256 accVoltPerShare; // Accumulated VOLT per share, times 1e12. See below.
}
function poolInfo(uint256 pid) external view returns (IMasterChef.PoolInfo memory);
function totalAllocPoint() external view returns (uint256);
function voltPerSec() external view returns (uint256);
function deposit(uint256 _pid, uint256 _amount) external;
function devPercent() external view returns (uint256);
function treasuryPercent() external view returns (uint256);
function investorPercent() external view returns (uint256);
}
interface IRewarder {
function onVoltReward(address user, uint256 newLpAmount) external;
function pendingTokens(address user) external view returns (uint256 pending);
function rewardToken() external view returns (IERC20);
}
library BoringERC20 {
bytes4 private constant SIG_SYMBOL = 0x95d89b41; // symbol()
bytes4 private constant SIG_NAME = 0x06fdde03; // name()
bytes4 private constant SIG_DECIMALS = 0x313ce567; // decimals()
bytes4 private constant SIG_TRANSFER = 0xa9059cbb; // transfer(address,uint256)
bytes4 private constant SIG_TRANSFER_FROM = 0x23b872dd; // transferFrom(address,address,uint256)
function returnDataToString(bytes memory data) internal pure returns (string memory) {
if (data.length >= 64) {
return abi.decode(data, (string));
} else if (data.length == 32) {
uint8 i = 0;
while (i < 32 && data[i] != 0) {
i++;
}
bytes memory bytesArray = new bytes(i);
for (i = 0; i < 32 && data[i] != 0; i++) {
bytesArray[i] = data[i];
}
return string(bytesArray);
} else {
return "???";
}
}
/// @notice Provides a safe ERC20.symbol version which returns '???' as fallback string.
/// @param token The address of the ERC-20 token contract.
/// @return (string) Token symbol.
function safeSymbol(IERC20 token) internal view returns (string memory) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_SYMBOL));
return success ? returnDataToString(data) : "???";
}
/// @notice Provides a safe ERC20.name version which returns '???' as fallback string.
/// @param token The address of the ERC-20 token contract.
/// @return (string) Token name.
function safeName(IERC20 token) internal view returns (string memory) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_NAME));
return success ? returnDataToString(data) : "???";
}
/// @notice Provides a safe ERC20.decimals version which returns '18' as fallback value.
/// @param token The address of the ERC-20 token contract.
/// @return (uint8) Token decimals.
function safeDecimals(IERC20 token) internal view returns (uint8) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_DECIMALS));
return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
}
/// @notice Provides a safe ERC20.transfer version for different ERC-20 implementations.
/// Reverts on a failed transfer.
/// @param token The address of the ERC-20 token.
/// @param to Transfer tokens to.
/// @param amount The token amount.
function safeTransfer(
IERC20 token,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER, to, amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: Transfer failed");
}
/// @notice Provides a safe ERC20.transferFrom version for different ERC-20 implementations.
/// Reverts on a failed transfer.
/// @param token The address of the ERC-20 token.
/// @param from Transfer tokens from.
/// @param to Transfer tokens to.
/// @param amount The token amount.
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = address(token).call(
abi.encodeWithSelector(SIG_TRANSFER_FROM, from, to, amount)
);
require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: TransferFrom failed");
}
}
/// @notice The (older) MasterChefVoltV2 contract gives out a constant number of VOLT tokens per block.
/// It is the only address with minting rights for VOLT.
/// The idea for this MasterChefVoltV3 (MCJV3) contract is therefore to be the owner of a dummy token
/// that is deposited into the MasterChefVoltV2 (MCJV2) contract.
/// The allocation point for this pool on MCJV3 is the total allocation point for all pools that receive double incentives.
contract MasterChefVoltV3 is Ownable, ReentrancyGuard {
using SafeMath for uint256;
using BoringERC20 for IERC20;
using EnumerableSet for EnumerableSet.AddressSet;
/// @notice Info of each MCJV3 user.
/// `amount` LP token amount the user has provided.
/// `rewardDebt` The amount of VOLT entitled to the user.
struct UserInfo {
uint256 amount;
uint256 rewardDebt;
}
/// @notice Info of each MCJV3 pool.
/// `allocPoint` The amount of allocation points assigned to the pool.
/// Also known as the amount of VOLT to distribute per block.
struct PoolInfo {
IERC20 lpToken;
uint256 accVoltPerShare;
uint256 lastRewardTimestamp;
uint256 allocPoint;
IRewarder rewarder;
}
/// @notice Address of MCJV2 contract.
IMasterChef public immutable MASTER_CHEF_V2;
/// @notice Address of VOLT contract.
IERC20 public immutable VOLT;
/// @notice The index of MCJV3 master pool in MCJV2
uint256 public immutable MASTER_PID;
/// @notice Info of each MCJV3 pool.
PoolInfo[] public poolInfo;
// Set of all LP tokens that have been added as pools
EnumerableSet.AddressSet private lpTokens;
/// @notice Info of each user that stakes LP tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
/// @dev Total allocation points. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint;
uint256 private constant ACC_TOKEN_PRECISION = 1e18;
event Add(uint256 indexed pid, uint256 allocPoint, IERC20 indexed lpToken, IRewarder indexed rewarder);
event Set(uint256 indexed pid, uint256 allocPoint, IRewarder indexed rewarder, bool overwrite);
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event UpdatePool(uint256 indexed pid, uint256 lastRewardTimestamp, uint256 lpSupply, uint256 accVoltPerShare);
event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
event Init();
/// @param _MASTER_CHEF_V2 The VoltSwap MCJV2 contract address.
/// @param _volt The VOLT token contract address.
/// @param _MASTER_PID The pool ID of the dummy token on the base MCJV2 contract.
constructor(
IMasterChef _MASTER_CHEF_V2,
IERC20 _volt,
uint256 _MASTER_PID
) public {
MASTER_CHEF_V2 = _MASTER_CHEF_V2;
VOLT = _volt;
MASTER_PID = _MASTER_PID;
}
/// @notice Deposits a dummy token to `MASTER_CHEF_V2` MCJV2. This is required because MCJV2 holds the minting rights for VOLT.
/// Any balance of transaction sender in `dummyToken` is transferred.
/// The allocation point for the pool on MCJV2 is the total allocation point for all pools that receive double incentives.
/// @param dummyToken The address of the ERC-20 token to deposit into MCJV2.
function init(IERC20 dummyToken) external onlyOwner {
uint256 balance = dummyToken.balanceOf(msg.sender);
require(balance != 0, "MasterChefV2: Balance must exceed 0");
dummyToken.safeTransferFrom(msg.sender, address(this), balance);
dummyToken.approve(address(MASTER_CHEF_V2), balance);
MASTER_CHEF_V2.deposit(MASTER_PID, balance);
emit Init();
}
/// @notice Returns the number of MCJV3 pools.
function poolLength() external view returns (uint256 pools) {
pools = poolInfo.length;
}
/// @notice Add a new LP to the pool. Can only be called by the owner.
/// DO NOT add the same LP token more than once. Rewards will be messed up if you do.
/// @param allocPoint AP of the new pool.
/// @param _lpToken Address of the LP ERC-20 token.
/// @param _rewarder Address of the rewarder delegate.
function add(
uint256 allocPoint,
IERC20 _lpToken,
IRewarder _rewarder
) external onlyOwner {
require(!lpTokens.contains(address(_lpToken)), "add: LP already added");
// Sanity check to ensure _lpToken is an ERC20 token
_lpToken.balanceOf(address(this));
// Sanity check if we add a rewarder
if (address(_rewarder) != address(0)) {
_rewarder.onVoltReward(address(0), 0);
}
uint256 lastRewardTimestamp = block.timestamp;
totalAllocPoint = totalAllocPoint.add(allocPoint);
poolInfo.push(
PoolInfo({
lpToken: _lpToken,
allocPoint: allocPoint,
lastRewardTimestamp: lastRewardTimestamp,
accVoltPerShare: 0,
rewarder: _rewarder
})
);
lpTokens.add(address(_lpToken));
emit Add(poolInfo.length.sub(1), allocPoint, _lpToken, _rewarder);
}
/// @notice Update the given pool's VOLT allocation point and `IRewarder` contract. Can only be called by the owner.
/// @param _pid The index of the pool. See `poolInfo`.
/// @param _allocPoint New AP of the pool.
/// @param _rewarder Address of the rewarder delegate.
/// @param overwrite True if _rewarder should be `set`. Otherwise `_rewarder` is ignored.
function set(
uint256 _pid,
uint256 _allocPoint,
IRewarder _rewarder,
bool overwrite
) external onlyOwner {
PoolInfo memory pool = poolInfo[_pid];
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint);
pool.allocPoint = _allocPoint;
if (overwrite) {
_rewarder.onVoltReward(address(0), 0); // sanity check
pool.rewarder = _rewarder;
}
poolInfo[_pid] = pool;
emit Set(_pid, _allocPoint, overwrite ? _rewarder : pool.rewarder, overwrite);
}
/// @notice View function to see pending VOLT on frontend.
/// @param _pid The index of the pool. See `poolInfo`.
/// @param _user Address of user.
/// @return pendingVolt VOLT reward for a given user.
// bonusTokenAddress The address of the bonus reward.
// bonusTokenSymbol The symbol of the bonus token.
// pendingBonusToken The amount of bonus rewards pending.
function pendingTokens(uint256 _pid, address _user)
external
view
returns (
uint256 pendingVolt,
address bonusTokenAddress,
string memory bonusTokenSymbol,
uint256 pendingBonusToken
)
{
PoolInfo memory pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accVoltPerShare = pool.accVoltPerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.timestamp > pool.lastRewardTimestamp && lpSupply != 0) {
uint256 secondsElapsed = block.timestamp.sub(pool.lastRewardTimestamp);
uint256 voltReward = secondsElapsed.mul(voltPerSec()).mul(pool.allocPoint).div(totalAllocPoint);
accVoltPerShare = accVoltPerShare.add(voltReward.mul(ACC_TOKEN_PRECISION).div(lpSupply));
}
pendingVolt = user.amount.mul(accVoltPerShare).div(ACC_TOKEN_PRECISION).sub(user.rewardDebt);
// If it's a double reward farm, we return info about the bonus token
if (address(pool.rewarder) != address(0)) {
bonusTokenAddress = address(pool.rewarder.rewardToken());
bonusTokenSymbol = IERC20(pool.rewarder.rewardToken()).safeSymbol();
pendingBonusToken = pool.rewarder.pendingTokens(_user);
}
}
/// @notice Update reward variables for all pools. Be careful of gas spending!
/// @param pids Pool IDs of all to be updated. Make sure to update all active pools.
function massUpdatePools(uint256[] calldata pids) external {
uint256 len = pids.length;
for (uint256 i = 0; i < len; ++i) {
updatePool(pids[i]);
}
}
/// @notice Calculates and returns the `amount` of VOLT per block.
function voltPerSec() public view returns (uint256 amount) {
uint256 total = 1000;
uint256 lpPercent = total.sub(MASTER_CHEF_V2.devPercent()).sub(MASTER_CHEF_V2.treasuryPercent()).sub(
MASTER_CHEF_V2.investorPercent()
);
uint256 lpShare = MASTER_CHEF_V2.voltPerSec().mul(lpPercent).div(total);
amount = lpShare.mul(MASTER_CHEF_V2.poolInfo(MASTER_PID).allocPoint).div(MASTER_CHEF_V2.totalAllocPoint());
}
/// @notice Update reward variables of the given pool.
/// @param pid The index of the pool. See `poolInfo`.
function updatePool(uint256 pid) public {
PoolInfo memory pool = poolInfo[pid];
if (block.timestamp > pool.lastRewardTimestamp) {
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (lpSupply > 0) {
uint256 secondsElapsed = block.timestamp.sub(pool.lastRewardTimestamp);
uint256 voltReward = secondsElapsed.mul(voltPerSec()).mul(pool.allocPoint).div(totalAllocPoint);
pool.accVoltPerShare = pool.accVoltPerShare.add((voltReward.mul(ACC_TOKEN_PRECISION).div(lpSupply)));
}
pool.lastRewardTimestamp = block.timestamp;
poolInfo[pid] = pool;
emit UpdatePool(pid, pool.lastRewardTimestamp, lpSupply, pool.accVoltPerShare);
}
}
/// @notice Deposit LP tokens to MCJV3 for VOLT allocation.
/// @param pid The index of the pool. See `poolInfo`.
/// @param amount LP token amount to deposit.
function deposit(uint256 pid, uint256 amount) external nonReentrant {
harvestFromMasterChef();
updatePool(pid);
PoolInfo memory pool = poolInfo[pid];
UserInfo storage user = userInfo[pid][msg.sender];
if (user.amount > 0) {
// Harvest VOLT
uint256 pending = user.amount.mul(pool.accVoltPerShare).div(ACC_TOKEN_PRECISION).sub(user.rewardDebt);
VOLT.safeTransfer(msg.sender, pending);
emit Harvest(msg.sender, pid, pending);
}
uint256 balanceBefore = pool.lpToken.balanceOf(address(this));
pool.lpToken.safeTransferFrom(msg.sender, address(this), amount);
uint256 receivedAmount = pool.lpToken.balanceOf(address(this)).sub(balanceBefore);
// Effects
user.amount = user.amount.add(receivedAmount);
user.rewardDebt = user.amount.mul(pool.accVoltPerShare).div(ACC_TOKEN_PRECISION);
// Interactions
IRewarder _rewarder = pool.rewarder;
if (address(_rewarder) != address(0)) {
_rewarder.onVoltReward(msg.sender, user.amount);
}
emit Deposit(msg.sender, pid, receivedAmount);
}
/// @notice Withdraw LP tokens from MCJV3.
/// @param pid The index of the pool. See `poolInfo`.
/// @param amount LP token amount to withdraw.
function withdraw(uint256 pid, uint256 amount) external nonReentrant {
harvestFromMasterChef();
updatePool(pid);
PoolInfo memory pool = poolInfo[pid];
UserInfo storage user = userInfo[pid][msg.sender];
if (user.amount > 0) {
// Harvest VOLT
uint256 pending = user.amount.mul(pool.accVoltPerShare).div(ACC_TOKEN_PRECISION).sub(user.rewardDebt);
VOLT.safeTransfer(msg.sender, pending);
emit Harvest(msg.sender, pid, pending);
}
// Effects
user.amount = user.amount.sub(amount);
user.rewardDebt = user.amount.mul(pool.accVoltPerShare).div(ACC_TOKEN_PRECISION);
// Interactions
IRewarder _rewarder = pool.rewarder;
if (address(_rewarder) != address(0)) {
_rewarder.onVoltReward(msg.sender, user.amount);
}
pool.lpToken.safeTransfer(msg.sender, amount);
emit Withdraw(msg.sender, pid, amount);
}
/// @notice Harvests VOLT from `MASTER_CHEF_V2` MCJV2 and pool `MASTER_PID` to this MCJV3 contract.
function harvestFromMasterChef() public {
MASTER_CHEF_V2.deposit(MASTER_PID, 0);
}
/// @notice Withdraw without caring about rewards. EMERGENCY ONLY.
/// @param pid The index of the pool. See `poolInfo`.
function emergencyWithdraw(uint256 pid) external nonReentrant {
PoolInfo memory pool = poolInfo[pid];
UserInfo storage user = userInfo[pid][msg.sender];
uint256 amount = user.amount;
user.amount = 0;
user.rewardDebt = 0;
IRewarder _rewarder = pool.rewarder;
if (address(_rewarder) != address(0)) {
_rewarder.onVoltReward(msg.sender, 0);
}
// Note: transfer can fail or succeed if `amount` is zero.
pool.lpToken.safeTransfer(msg.sender, amount);
emit EmergencyWithdraw(msg.sender, pid, amount);
}
}

Contract ABI

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IRewarder","indexed":true}],"anonymous":false},{"type":"event","name":"Deposit","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"EmergencyWithdraw","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Harvest","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Init","inputs":[],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Set","inputs":[{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"allocPoint","internalType":"uint256","indexed":false},{"type":"address","name":"rewarder","internalType":"contract IRewarder","indexed":true},{"type":"bool","name":"overwrite","internalType":"bool","indexed":false}],"anonymous":false},{"type":"event","name":"UpdatePool","inputs":[{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"lastRewardTimestamp","internalType":"uint256","indexed":false},{"type":"uint256","name":"lpSupply","internalType":"uint256","indexed":false},{"type":"uint256","name":"accVoltPerShare","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Withdraw","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IMasterChef"}],"name":"MASTER_CHEF_V2","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"MASTER_PID","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IERC20"}],"name":"VOLT","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"add","inputs":[{"type":"uint256","name":"allocPoint","internalType":"uint256"},{"type":"address","name":"_lpToken","internalType":"contract IERC20"},{"type":"address","name":"_rewarder","internalType":"contract IRewarder"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"deposit","inputs":[{"type":"uint256","name":"pid","internalType":"uint256"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"emergencyWithdraw","inputs":[{"type":"uint256","name":"pid","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"harvestFromMasterChef","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"init","inputs":[{"type":"address","name":"dummyToken","internalType":"contract IERC20"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"massUpdatePools","inputs":[{"type":"uint256[]","name":"pids","internalType":"uint256[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"pendingVolt","internalType":"uint256"},{"type":"address","name":"bonusTokenAddress","internalType":"address"},{"type":"string","name":"bonusTokenSymbol","internalType":"string"},{"type":"uint256","name":"pendingBonusToken","internalType":"uint256"}],"name":"pendingTokens","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"address","name":"_user","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"lpToken","internalType":"contract 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IRewarder"},{"type":"bool","name":"overwrite","internalType":"bool"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalAllocPoint","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"updatePool","inputs":[{"type":"uint256","name":"pid","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"uint256","name":"rewardDebt","internalType":"uint256"}],"name":"userInfo","inputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"amount","internalType":"uint256"}],"name":"voltPerSec","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"withdraw","inputs":[{"type":"uint256","name":"pid","internalType":"uint256"},{"type":"uint256","name":"amount","internalType":"uint256"}]}]
            

Deployed ByteCode

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