Contract Name:
DistributionV2
Contract Source Code:
File 1 of 1 : DistributionV2
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/Context.sol
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
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: contracts/access/Operator.sol
pragma solidity >=0.7.0 <0.8.0;
abstract contract Operator is Context, Ownable {
address private _operator;
event OperatorTransferred(
address indexed previousOperator,
address indexed newOperator
);
constructor() {
_operator = _msgSender();
emit OperatorTransferred(address(0), _operator);
}
function operator() public view returns (address) {
return _operator;
}
modifier onlyOperator() {
require(
_operator == _msgSender(),
'operator: caller is not the operator'
);
_;
}
function isOperator() public view returns (bool) {
return _msgSender() == _operator;
}
function transferOperator(address newOperator_) public onlyOwner {
_transferOperator(newOperator_);
}
function _transferOperator(address newOperator_) internal {
require(
newOperator_ != address(0),
'operator: zero address given for new operator'
);
emit OperatorTransferred(address(0), newOperator_);
_operator = newOperator_;
}
}
// File: @openzeppelin/contracts/math/Math.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/math/SafeMath.sol
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/token/ERC20/SafeERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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 IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
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));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
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));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @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. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "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: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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);
/**
* @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);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: contracts/distribution/PoolStore.sol
pragma solidity >=0.7.0 <0.8.0;
interface IPoolStore {
/* ================= EVENTS ================= */
event Deposit(
address indexed operator,
address indexed owner,
uint256 indexed pid,
uint256 amount
);
event Withdraw(
address indexed operator,
address indexed owner,
uint256 indexed pid,
uint256 amount
);
/* ================= CALLS ================= */
// common
function totalWeight() external view returns (uint256);
function poolLength() external view returns (uint256);
// index
function poolIdsOf(address _token) external view returns (uint256[] memory);
// pool info
function nameOf(uint256 _pid) external view returns (string memory);
function tokenOf(uint256 _pid) external view returns (address);
function weightOf(uint256 _pid) external view returns (uint256);
function totalSupply(uint256 _pid) external view returns (uint256);
function balanceOf(uint256 _pid, address _owner)
external
view
returns (uint256);
/* ================= TXNS ================= */
function deposit(
uint256 _pid,
address _owner,
uint256 _amount
) external;
function withdraw(
uint256 _pid,
address _owner,
uint256 _amount
) external;
function emergencyWithdraw(uint256 _pid) external;
}
interface IPoolStoreGov {
/* ================= EVENTS ================= */
event EmergencyReported(address indexed reporter);
event EmergencyResolved(address indexed resolver);
event WeightFeederChanged(
address indexed operator,
address indexed oldFeeder,
address indexed newFeeder
);
event PoolAdded(
address indexed operator,
uint256 indexed pid,
string name,
address token,
uint256 weight
);
event PoolWeightChanged(
address indexed operator,
uint256 indexed pid,
uint256 from,
uint256 to
);
event PoolNameChanged(
address indexed operator,
uint256 indexed pid,
string from,
string to
);
/* ================= TXNS ================= */
// emergency
function reportEmergency() external;
function resolveEmergency() external;
// feeder
function setWeightFeeder(address _newFeeder) external;
// pool setting
function addPool(
string memory _name,
IERC20 _token,
uint256 _weight
) external;
function setPool(uint256 _pid, uint256 _weight) external;
function setPool(uint256 _pid, string memory _name) external;
}
contract PoolStore is IPoolStore, IPoolStoreGov, Operator {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/* ================= DATA STRUCTURE ================= */
struct Pool {
string name;
IERC20 token;
uint256 weight;
uint256 totalSupply;
}
/* ================= STATES ================= */
uint256 public override totalWeight = 0;
Pool[] public pools;
mapping(uint256 => mapping(address => uint256)) balances;
mapping(address => uint256[]) public indexByToken;
bool public emergency = false;
address public weightFeeder;
constructor() Operator() {
weightFeeder = _msgSender();
}
/* ================= GOV - OWNER ONLY ================= */
/**
* @dev CAUTION: DO NOT USE IN NORMAL SITUATION
* @notice Enable emergency withdraw
*/
function reportEmergency() public override onlyOwner {
emergency = true;
emit EmergencyReported(_msgSender());
}
/**
* @dev CAUTION: DO NOT USE IN NORMAL SITUATION
* @notice Disable emergency withdraw
*/
function resolveEmergency() public override onlyOwner {
emergency = false;
emit EmergencyResolved(_msgSender());
}
/*
* @param _newFeeder weight feeder address to change
*/
function setWeightFeeder(address _newFeeder) public override onlyOwner {
address oldFeeder = weightFeeder;
weightFeeder = _newFeeder;
emit WeightFeederChanged(_msgSender(), oldFeeder, _newFeeder);
}
/**
* @param _token pool token
* @param _weight pool weight
*/
function addPool(
string memory _name,
IERC20 _token,
uint256 _weight
) public override onlyOwner {
totalWeight = totalWeight.add(_weight);
uint256 index = pools.length;
indexByToken[address(_token)].push(index);
pools.push(
Pool({name: _name, token: _token, weight: _weight, totalSupply: 0})
);
emit PoolAdded(_msgSender(), index, _name, address(_token), _weight);
}
/**
* @param _pid pool id
* @param _weight target pool weight
*/
function setPool(uint256 _pid, uint256 _weight)
public
override
onlyWeightFeeder
checkPoolId(_pid)
{
Pool memory pool = pools[_pid];
uint256 oldWeight = pool.weight;
totalWeight = totalWeight.add(_weight).sub(pool.weight);
pool.weight = _weight;
pools[_pid] = pool;
emit PoolWeightChanged(_msgSender(), _pid, oldWeight, _weight);
}
/**
* @param _pid pool id
* @param _name name of pool
*/
function setPool(uint256 _pid, string memory _name)
public
override
checkPoolId(_pid)
onlyOwner
{
string memory oldName = pools[_pid].name;
pools[_pid].name = _name;
emit PoolNameChanged(_msgSender(), _pid, oldName, _name);
}
/* ================= MODIFIER ================= */
modifier onlyWeightFeeder {
require(_msgSender() == weightFeeder, 'PoolStore: unauthorized');
_;
}
modifier checkPoolId(uint256 _pid) {
require(_pid <= pools.length, 'PoolStore: invalid pid');
_;
}
/* ================= CALLS - ANYONE ================= */
/**
* @return total pool length
*/
function poolLength() public view override returns (uint256) {
return pools.length;
}
/**
* @param _token pool token address
* @return pool id
*/
function poolIdsOf(address _token)
public
view
override
returns (uint256[] memory)
{
return indexByToken[_token];
}
/**
* @param _pid pool id
* @return name of pool
*/
function nameOf(uint256 _pid)
public
view
override
checkPoolId(_pid)
returns (string memory)
{
return pools[_pid].name;
}
/**
* @param _pid pool id
* @return pool token
*/
function tokenOf(uint256 _pid)
public
view
override
checkPoolId(_pid)
returns (address)
{
return address(pools[_pid].token);
}
/**
* @param _pid pool id
* @return pool weight
*/
function weightOf(uint256 _pid)
public
view
override
checkPoolId(_pid)
returns (uint256)
{
return pools[_pid].weight;
}
/**
* @param _pid pool id
* @return total staked token amount
*/
function totalSupply(uint256 _pid)
public
view
override
checkPoolId(_pid)
returns (uint256)
{
return pools[_pid].totalSupply;
}
/**
* @param _pid pool id
* @param _sender staker address
* @return staked amount of user
*/
function balanceOf(uint256 _pid, address _sender)
public
view
override
checkPoolId(_pid)
returns (uint256)
{
return balances[_pid][_sender];
}
/* ================= TXNS - OPERATOR ONLY ================= */
/**
* @param _pid pool id
* @param _owner stake address
* @param _amount stake amount
*/
function deposit(
uint256 _pid,
address _owner,
uint256 _amount
) public override checkPoolId(_pid) onlyOperator {
pools[_pid].totalSupply = pools[_pid].totalSupply.add(_amount);
balances[_pid][_owner] = balances[_pid][_owner].add(_amount);
IERC20(tokenOf(_pid)).safeTransferFrom(
_msgSender(),
address(this),
_amount
);
emit Deposit(_msgSender(), _owner, _pid, _amount);
}
function _withdraw(
uint256 _pid,
address _owner,
uint256 _amount
) internal {
pools[_pid].totalSupply = pools[_pid].totalSupply.sub(_amount);
balances[_pid][_owner] = balances[_pid][_owner].sub(_amount);
IERC20(tokenOf(_pid)).safeTransfer(_msgSender(), _amount);
emit Withdraw(_msgSender(), _owner, _pid, _amount);
}
/**
* @param _pid pool id
* @param _owner stake address
* @param _amount stake amount
*/
function withdraw(
uint256 _pid,
address _owner,
uint256 _amount
) public override checkPoolId(_pid) onlyOperator {
_withdraw(_pid, _owner, _amount);
}
/**
* @notice Anyone can withdraw its balance even if is not the operator
* @param _pid pool id
*/
function emergencyWithdraw(uint256 _pid) public override checkPoolId(_pid) {
require(emergency, 'PoolStore: not in emergency');
_withdraw(_pid, msg.sender, balanceOf(_pid, _msgSender()));
}
}
// File: contracts/distribution/PoolStoreWrapper.sol
pragma solidity >=0.7.0 <0.8.0;
abstract contract PoolStoreWrapper is Context {
using SafeERC20 for IERC20;
IPoolStore public store;
function deposit(uint256 _pid, uint256 _amount) public virtual {
IERC20(store.tokenOf(_pid)).safeTransferFrom(
_msgSender(),
address(this),
_amount
);
store.deposit(_pid, _msgSender(), _amount);
}
function withdraw(uint256 _pid, uint256 _amount) public virtual {
store.withdraw(_pid, _msgSender(), _amount);
IERC20(store.tokenOf(_pid)).safeTransfer(_msgSender(), _amount);
}
}
// File: contracts/distribution/IPool.sol
pragma solidity >=0.7.0 <0.8.0;
interface IPool {
/* ================= EVENTS ================= */
event DepositToken(
address indexed owner,
uint256 indexed pid,
uint256 amount
);
event WithdrawToken(
address indexed owner,
uint256 indexed pid,
uint256 amount
);
event RewardClaimed(
address indexed owner,
uint256 indexed pid,
uint256 amount
);
/* ================= CALLS ================= */
function tokenOf(uint256 _pid) external view returns (address);
function poolIdsOf(address _token) external view returns (uint256[] memory);
function totalSupply(uint256 _pid) external view returns (uint256);
function balanceOf(uint256 _pid, address _owner)
external
view
returns (uint256);
function rewardRatePerPool(uint256 _pid) external view returns (uint256);
function rewardPerToken(uint256 _pid) external view returns (uint256);
function rewardEarned(uint256 _pid, address _target)
external
view
returns (uint256);
/* ================= TXNS ================= */
function massUpdate(uint256[] memory _pids) external;
function update(uint256 _pid) external;
function deposit(uint256 _pid, uint256 _amount) external;
function withdraw(uint256 _pid, uint256 _amount) external;
function claimReward(uint256 _pid) external;
function exit(uint256 _pid) external;
}
interface IPoolGov {
/* ================= EVENTS ================= */
event RewardNotified(
address indexed operator,
uint256 amount,
uint256 period
);
/* ================= TXNS ================= */
function setPeriod(uint256 _startTime, uint256 _period) external;
function setReward(uint256 _amount) external;
function setExtraRewardRate(uint256 _extra) external;
function stop() external;
function migrate(address _newPool, uint256 _amount) external;
}
// File: contracts/distribution/DistributionV2.sol
pragma solidity >=0.7.0 <0.8.0;
contract DistributionV2 is IPool, IPoolGov, PoolStoreWrapper, Operator {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/* ================= DATA STRUCTURE ================= */
struct User {
uint256 amount;
uint256 reward;
uint256 rewardPerTokenPaid;
}
struct Pool {
bool initialized;
uint256 rewardRate;
uint256 lastUpdateTime;
uint256 rewardPerTokenStored;
}
/* ================= STATE VARIABLES ================= */
// share
address public share;
mapping(address => bool) public approvals;
// poolId => Pool
mapping(uint256 => Pool) public pools;
// poolId => sender => User
mapping(uint256 => mapping(address => User)) public users;
// poolId => sender => bool
mapping(uint256 => mapping(address => bool)) public oldPoolClaimed;
address oldPool;
bool public stopped = false;
uint256 public rewardRate = 0;
uint256 public rewardRateExtra = 0;
// halving
uint256 public rewardRateBeforeHalve = 0;
// year2=>4%, year3=>3.5%, year4=>3%
uint256[] public inflationRate = [0, 0, 400, 350, 300];
uint256 public year = 1;
uint256 public startSupply = 860210511822372000000000;
// control
uint256 public period = 0;
uint256 public periodFinish = 0;
uint256 public startTime = 0;
/* ================= CONSTRUCTOR ================= */
constructor(address _share, address _poolStore) Ownable() {
share = _share;
store = IPoolStore(_poolStore);
}
/* ================= GOV - OWNER ONLY ================= */
/**
* @param _startTime starting time to distribute
* @param _period distribution period
*/
function setPeriod(uint256 _startTime, uint256 _period)
public
override
onlyOperator
{
// re-calc
if (startTime <= block.timestamp && block.timestamp < periodFinish) {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = leftover.div(_period);
}
period = _period;
startTime = _startTime;
periodFinish = _startTime.add(_period);
}
/**
* @param _amount token amount to distribute
*/
function setReward(uint256 _amount) public override onlyOperator {
require(block.timestamp < periodFinish, 'BACPool: already finished');
if (startTime <= block.timestamp) {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = _amount.add(leftover).div(
periodFinish.sub(block.timestamp)
);
} else {
rewardRate = rewardRate.add(
_amount.div(periodFinish.sub(startTime))
);
}
}
function setExtraRewardRate(uint256 _extra) public override onlyOwner {
rewardRateExtra = _extra;
}
function setOldPool(address _oldPool) public onlyOwner {
oldPool = _oldPool;
}
/**
* @dev STOP DISTRIBUTION
*/
function stop() public override onlyOwner {
periodFinish = block.timestamp;
stopped = true;
}
/**
* @dev MUST UPDATE ALL POOL REWARD BEFORE MIGRATION!!!!!
* @param _newPool new pool address to migrate
*/
function migrate(address _newPool, uint256 _amount)
public
override
onlyOwner
{
require(stopped, 'BACPool: not stopped');
IERC20(share).safeTransfer(_newPool, _amount);
uint256 remaining = startTime.add(period).sub(periodFinish);
uint256 leftover = remaining.mul(rewardRate);
IPoolGov(_newPool).setPeriod(block.timestamp.add(1), remaining);
IPoolGov(_newPool).setReward(leftover);
}
/* ================= MODIFIER ================= */
/**
* @param _pid pool id
* @param _target update target. if is empty, skip individual update.
*/
modifier updateReward(uint256 _pid, address _target) {
if (!approvals[store.tokenOf(_pid)]) {
IERC20(store.tokenOf(_pid)).safeApprove(
address(store),
type(uint256).max
);
approvals[store.tokenOf(_pid)] = true;
}
if (block.timestamp >= startTime) {
if (!pools[_pid].initialized) {
pools[_pid] = Pool({
initialized: true,
rewardRate: rewardRate,
lastUpdateTime: startTime,
rewardPerTokenStored: 0
});
}
// halve
if (!stopped && block.timestamp >= periodFinish) {
// 11% weekly decrease reward rate
if (block.timestamp < 1638144000) {
// 2021-11-29 00:00:00 UTC
rewardRateBeforeHalve = rewardRate;
rewardRate = rewardRate.mul(89).div(100);
} else {
period = 365 days;
year += 1;
uint256 periodAll =
startSupply.mul(inflationRate[year]).div(10000);
rewardRate = periodAll.div(31536000);
rewardRateBeforeHalve = rewardRate;
startSupply += periodAll;
// 2% for the year5 and beyond
inflationRate.push(200);
}
// set period
startTime = block.timestamp;
periodFinish = block.timestamp.add(period);
}
Pool memory pool = pools[_pid];
pool.rewardPerTokenStored = rewardPerToken(_pid);
if (pool.rewardRate == rewardRateBeforeHalve) {
pool.rewardRate = rewardRate;
}
pool.lastUpdateTime = applicableRewardTime();
pools[_pid] = pool;
if (_target != address(0x0)) {
User memory user = users[_pid][_target];
user.reward = rewardEarned(_pid, _target);
if (!oldPoolClaimed[_pid][_target]) {
oldPoolClaimed[_pid][_target] = true;
}
user.rewardPerTokenPaid = pool.rewardPerTokenStored;
users[_pid][_target] = user;
}
}
_;
}
/* ================= CALLS - ANYONE ================= */
/**
* @param _pid pool id
* @return pool token address
*/
function tokenOf(uint256 _pid) external view override returns (address) {
return store.tokenOf(_pid);
}
/**
* @param _token pool token address
* @return pool id
*/
function poolIdsOf(address _token)
external
view
override
returns (uint256[] memory)
{
return store.poolIdsOf(_token);
}
/**
* @param _pid pool id
* @return pool's total staked amount
*/
function totalSupply(uint256 _pid)
external
view
override
returns (uint256)
{
return store.totalSupply(_pid);
}
/**
* @param _owner staker address
* @return staker balance
*/
function balanceOf(uint256 _pid, address _owner)
external
view
override
returns (uint256)
{
return store.balanceOf(_pid, _owner);
}
/**
* @return applicable reward time
*/
function applicableRewardTime() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
/**
* @param _pid pool id
* @param _crit reward rate
*/
function _rewardRatePerPool(uint256 _pid, uint256 _crit)
internal
view
returns (uint256)
{
return _crit.mul(store.weightOf(_pid)).div(store.totalWeight());
}
/**
* @param _pid pool id
* @return calculated reward rate per pool
*/
function rewardRatePerPool(uint256 _pid)
public
view
override
returns (uint256)
{
return _rewardRatePerPool(_pid, rewardRate.add(rewardRateExtra));
}
/**
* @param _pid pool id
* @return RPT per pool
*/
function rewardPerToken(uint256 _pid)
public
view
override
returns (uint256)
{
Pool memory pool = pools[_pid];
if (store.totalSupply(_pid) == 0 || block.timestamp < startTime) {
return pool.rewardPerTokenStored;
}
if (pool.rewardRate != 0 && pool.rewardRate == rewardRateBeforeHalve) {
uint256 beforeHalve =
startTime
.sub(pool.lastUpdateTime)
.mul(_rewardRatePerPool(_pid, rewardRateBeforeHalve))
.mul(1e18)
.div(store.totalSupply(_pid));
uint256 afterHalve =
applicableRewardTime()
.sub(startTime)
.mul(rewardRatePerPool(_pid))
.mul(1e18)
.div(store.totalSupply(_pid));
return pool.rewardPerTokenStored.add(beforeHalve).add(afterHalve);
} else {
return
pool.rewardPerTokenStored.add(
applicableRewardTime()
.sub(pool.lastUpdateTime)
.mul(rewardRatePerPool(_pid))
.mul(1e18)
.div(store.totalSupply(_pid))
);
}
}
/**
* @param _pid pool id
* @param _target target address
* @return reward amount per pool
*/
function rewardEarned(uint256 _pid, address _target)
public
view
override
returns (uint256)
{
User memory user = users[_pid][_target];
uint256 oldUnclaim = 0;
if (oldPool != address(0x0) && !oldPoolClaimed[_pid][_target]) {
oldUnclaim += IPool(oldPool).rewardEarned(_pid, _target);
}
return
store
.balanceOf(_pid, _target)
.mul(rewardPerToken(_pid).sub(user.rewardPerTokenPaid))
.div(1e18)
.add(user.reward)
.add(oldUnclaim);
}
/* ================= TXNS - ANYONE ================= */
/**
* @param _pids array of pool ids
*/
function massUpdate(uint256[] memory _pids) public override {
for (uint256 i = 0; i < _pids.length; i++) {
update(_pids[i]);
}
}
/**
* @param _pid pool id
*/
function update(uint256 _pid)
public
override
updateReward(_pid, address(0x0))
{}
/**
* @param _pid pool id
* @param _amount deposit amount
*/
function deposit(uint256 _pid, uint256 _amount)
public
override(IPool, PoolStoreWrapper)
updateReward(_pid, _msgSender())
{
require(!stopped, 'BASPool: stopped');
super.deposit(_pid, _amount);
emit DepositToken(_msgSender(), _pid, _amount);
}
/**
* @param _pid pool id
* @param _amount withdraw amount
*/
function withdraw(uint256 _pid, uint256 _amount)
public
override(IPool, PoolStoreWrapper)
updateReward(_pid, _msgSender())
{
require(!stopped, 'BASPool: stopped');
super.withdraw(_pid, _amount);
emit WithdrawToken(_msgSender(), _pid, _amount);
}
/**
* @param _pid pool id
*/
function claimReward(uint256 _pid)
public
override
updateReward(_pid, _msgSender())
{
claimReward(_pid, _msgSender());
}
/**
* @param _pid pool id
* @param _owner claim for owner
*/
function claimReward(uint256 _pid, address _owner)
public
updateReward(_pid, _owner)
{
uint256 reward = users[_pid][_owner].reward;
if (reward > 0) {
users[_pid][_owner].reward = 0;
IERC20(share).safeTransfer(_owner, reward);
emit RewardClaimed(_owner, _pid, reward);
}
}
/**
* @dev withdraw + claim
* @param _pid pool id
*/
function exit(uint256 _pid) external override {
withdraw(_pid, store.balanceOf(_pid, _msgSender()));
claimReward(_pid);
}
}