Contract Name:
RewardReader
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @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, 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) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* 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);
uint256 c = a - b;
return c;
}
/**
* @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) {
// 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 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts 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) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts 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) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @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);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "../libraries/token/IERC20.sol";
import "../libraries/math/SafeMath.sol";
import "../staking/interfaces/IVester.sol";
import "../staking/interfaces/IRewardTracker.sol";
contract RewardReader {
using SafeMath for uint256;
function getDepositBalances(address _account, address[] memory _depositTokens, address[] memory _rewardTrackers) public view returns (uint256[] memory) {
uint256[] memory amounts = new uint256[](_rewardTrackers.length);
for (uint256 i = 0; i < _rewardTrackers.length; i++) {
IRewardTracker rewardTracker = IRewardTracker(_rewardTrackers[i]);
amounts[i] = rewardTracker.depositBalances(_account, _depositTokens[i]);
}
return amounts;
}
function getStakingInfo(address _account, address[] memory _rewardTrackers) public view returns (uint256[] memory) {
uint256 propsLength = 5;
uint256[] memory amounts = new uint256[](_rewardTrackers.length * propsLength);
for (uint256 i = 0; i < _rewardTrackers.length; i++) {
IRewardTracker rewardTracker = IRewardTracker(_rewardTrackers[i]);
amounts[i * propsLength] = rewardTracker.claimable(_account);
amounts[i * propsLength + 1] = rewardTracker.tokensPerInterval();
amounts[i * propsLength + 2] = rewardTracker.averageStakedAmounts(_account);
amounts[i * propsLength + 3] = rewardTracker.cumulativeRewards(_account);
amounts[i * propsLength + 4] = IERC20(_rewardTrackers[i]).totalSupply();
}
return amounts;
}
function getVestingInfoV2(address _account, address[] memory _vesters) public view returns (uint256[] memory) {
uint256 propsLength = 12;
uint256[] memory amounts = new uint256[](_vesters.length * propsLength);
for (uint256 i = 0; i < _vesters.length; i++) {
IVester vester = IVester(_vesters[i]);
IRewardTracker rewardTracker = IRewardTracker(vester.rewardTracker());
amounts[i * propsLength] = vester.pairAmounts(_account);
amounts[i * propsLength + 1] = vester.getVestedAmount(_account);
amounts[i * propsLength + 2] = IERC20(_vesters[i]).balanceOf(_account);
amounts[i * propsLength + 3] = vester.claimedAmounts(_account);
amounts[i * propsLength + 4] = vester.claimable(_account);
amounts[i * propsLength + 5] = vester.getMaxVestableAmount(_account);
amounts[i * propsLength + 6] = vester.getCombinedAverageStakedAmount(_account);
amounts[i * propsLength + 7] = rewardTracker.cumulativeRewards(_account);
amounts[i * propsLength + 8] = vester.transferredCumulativeRewards(_account);
amounts[i * propsLength + 9] = vester.bonusRewards(_account);
amounts[i * propsLength + 10] = rewardTracker.averageStakedAmounts(_account);
amounts[i * propsLength + 11] = vester.transferredAverageStakedAmounts(_account);
}
return amounts;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
interface IRewardTracker {
function depositBalances(address _account, address _depositToken) external view returns (uint256);
function stakedAmounts(address _account) external view returns (uint256);
function updateRewards() external;
function stake(address _depositToken, uint256 _amount) external;
function stakeForAccount(address _fundingAccount, address _account, address _depositToken, uint256 _amount) external;
function unstake(address _depositToken, uint256 _amount) external;
function unstakeForAccount(address _account, address _depositToken, uint256 _amount, address _receiver) external;
function tokensPerInterval() external view returns (uint256);
function claim(address _receiver) external returns (uint256);
function claimForAccount(address _account, address _receiver) external returns (uint256);
function claimable(address _account) external view returns (uint256);
function averageStakedAmounts(address _account) external view returns (uint256);
function cumulativeRewards(address _account) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
interface IVester {
function rewardTracker() external view returns (address);
function claimForAccount(address _account, address _receiver) external returns (uint256);
function claimable(address _account) external view returns (uint256);
function cumulativeClaimAmounts(address _account) external view returns (uint256);
function claimedAmounts(address _account) external view returns (uint256);
function pairAmounts(address _account) external view returns (uint256);
function getVestedAmount(address _account) external view returns (uint256);
function transferredAverageStakedAmounts(address _account) external view returns (uint256);
function transferredCumulativeRewards(address _account) external view returns (uint256);
function cumulativeRewardDeductions(address _account) external view returns (uint256);
function bonusRewards(address _account) external view returns (uint256);
function transferStakeValues(address _sender, address _receiver) external;
function setTransferredAverageStakedAmounts(address _account, uint256 _amount) external;
function setTransferredCumulativeRewards(address _account, uint256 _amount) external;
function setCumulativeRewardDeductions(address _account, uint256 _amount) external;
function setBonusRewards(address _account, uint256 _amount) external;
function getMaxVestableAmount(address _account) external view returns (uint256);
function getCombinedAverageStakedAmount(address _account) external view returns (uint256);
}